Jordan, officially the Hashemite Kingdom of Jordan, is a country in the Southern Levant region of West Asia. Jordan is bordered by Syria to the north, Iraq to the east, Saudi Arabia to the south, and
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ad1633caab1680678b64dde39af62375c96d51810c065469d26ed58badcc1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/035c55a7-39b2-4bac-be60-7dad4286553d.json and https://artists.proofprofile.net/proofs/artist/035c55a7-39b2-4bac-be60-7dad4286553d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e11b0e419807147b3677a72f9f870e46a1175d60496fcb7616883fceb2bb6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0289a30ddcffe8bfe492a90eb309722afaf978adb1a948203194465f22c1ec1. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e1238fe71bab4e101d8d70ec945897df582b032582b8634c6ecc0faef3807d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ea460887642ff3f4f3a01cb6933a969e1e8ea7f0a01d10e8c38af95c2b40b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558b5ee3365d9bd9cc6db0c2a81bdd909c6cf2682aef450874aad1ddd440be46. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe686e1faf3ada837ac1070d5c5c48befd588302291a35a69030513a0f1ab6d6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e974e5da413569d8839519729a25dd7fc0f2c0ca021ee64e518b662e314f496. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1889e8aa1304fe8e571c60cee2f4bf9b408808e89737fd1566d71fb18c18082e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0fe1af45a755d21953eb795882db133e12a4396e60851f8cb13dcaf99f8739. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430772e900560cae7272921621d91f270e50fea415de7772dcc4c03e7920066. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e11b0e419807147b3677a72f9f870e46a1175d60496fcb7616883fceb2bb6. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2be6dea787cfb24e006607ad14f678664c4c6f95d76a07c84b336fed231c0c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:07:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999e665e16e2661fb1b09931b7fe6eabcafaad29800e6ce0bc5df9e92cec0ecd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:43:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577daeec881f04a687e6bc16ee0b8b262a1a79ba3444e8acbe068b2a0317f6da. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF061000893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ba6ad2b2fb63937f6a67325cd3c2ef520e3e0e580c40243bf8c7b3ae18eef. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1616352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581d083a5f1a14256243fd72a7a4b968207fd69c014cb09c75f5be2ba273cb3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414f8a473abaf8957948e4f82f658a6acdf8722fe3b6530d805d8b0b21997bb5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd177a8e1a0ac8e20d847319ab5a01fc17704732b8d27bdde3abdfdb7fd8ebb36. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a17ae257ea0af36c61ab6174d7f90b7d3c2163dc34d711a537fbbfea49e2ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97234e1349299854cfaa65ffc2d74a240e0f536c97219609962bea5e929a5b50. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1615923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d345637549f68740fbda77b48dc00cb6476d71e9f5c74912ecc1f7fdbc6c19b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1611480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bbce2f0b3e69729bdec142573586b49255352750cc06e2a7b81dd8b3a90a41. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1614602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cac158f0a9faacbb20f24a8d9103c6668fcd8a153325c76934ecd85db52d3df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1744881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b458b7e14b57e25add73e3bb0d73f4bbf5ea8e2767e3b46fc1a413201a2d4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2042978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec71a4962b339cefb219c9a95263e60e4e692ea3e1fe67c770a572b4cb31be2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282095285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac98540f5036a897bc0892436374a05945b7cd4cd5744dfb04d761e066d35ee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282095289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146b37704b2379f1b12da93c0f29d9034afeda37eaa54ac0434ce81f4fa97bd2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282095290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41d8acfc22277c52ac21a880072dc233b2654c6a66c6ad6b8774404000c1294. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282095297.
Mix Sound /La Temporera / Cumbia / Furia Loca - En Vivo - Teatro Teletón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567179526aedd24bda195217ad250d2ddab208c39a4e543dee32b23503ab30a6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282095298.
Mix la Cumbia del Pueblo: Corsario del Amor / Esta Noche / La Cumbia del Pueblo / Sin Tu Querer / Llévame / Yo Te Haré el Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fbbb6bb0668a06148300286db5c922c18926e2426c4014141e09f9250e0042. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92247728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0939a87db39efbf3b22c0b0e67994fb255b8b64acbb5e39dba09fb8129d305. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:21:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2209787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cac158f0a9faacbb20f24a8d9103c6668fcd8a153325c76934ecd85db52d3df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1744881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce71a22de7971687f80caa148971fec1364489f18547dd5cdbe0450421bebdd1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72396718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033cc1158084ff946b3b1fc49283c43c828a98d15c38a6cd24ae7ea5423292a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG2330931.
Aquello Que Pasó (En Vivo - Teatro Coliseo)
Caparazón Contento (En Vivo Teatro Coliseo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718178e2ce19f826e381c074671b24d566f9d644bac25c01a7ea5a9f0feba608. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEP1915101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83307d5f7345f529ce3d42bb26a83ba9cec7cda27eec395cf9d8db98ce3cc6e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2045211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83307d5f7345f529ce3d42bb26a83ba9cec7cda27eec395cf9d8db98ce3cc6e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2045211.
Dj Pinky Presenta: Megamix - los Mejores Mix de la Música
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41bfd8544816d08525c22fda923b48b0a42ae200d438bc5011aab7b79717a05. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLAB20903320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedd833c80fe186ff8347d325200465a8b13b4e12cdba6d65d21ad3641e2c99f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLAB20903322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903aa439de750fa712911861253c7c9278af61d925c0ccfd7fc88919a36d2687. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLAB20903342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4fde07d398741c66e9d6db298ff57cd5cecc4e1fce18a50c673621a37fac6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARQIH2291601.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch