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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 0xdb88faef4af428cab4fa8204713bdce9609f3c2d1d4e5d0dc5a5ed95f0fa4a79. 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/388efc8b-dd3f-4e55-9bd3-8d33880a922a.json and https://artists.proofprofile.net/proofs/artist/388efc8b-dd3f-4e55-9bd3-8d33880a922a.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 0xda7a01d7da831f73f5e1b7f06a290a40e96892774aa4cec1ddfb3d994f7c417c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITB551714779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51125cbff464b7a65c216d247cf9c69664b6af3eb43c04f982e210747b3e2b2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITUM71800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b413d929f37df91ba64818ecdf25ec04b80a7388a90249e36b6fc09ad2bb5. 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/ITUM71801085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87130dd5fabe89f37ac0454d63cea731c0bc68648da4f9cec3f92065a837a8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:15Z), 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/ITUM71900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8603291045dc225ad209a2da753ddd455de79d009baae75f3f5cccd8171192f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ITUM71900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2eb6516fe8c3b72e42cdb64607678b7933f3526169a129b6514e716e72b4e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITUM71900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be2db06e0a283a30f684161a576e92052cf898f854c5cf511878130f94ec221. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITUM71900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082ee28144aa5afd09c1139e96fb7a9f8afe4eb65ed0c099ac89664c0d786087. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:14:56Z), 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/ITUM71900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b1540ae75373fdc31a59a160a78d8371af2ef3170db36646572bcf187b8f01. 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/ITUM72000779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0495a25a384ff877417239407f932f405e70baab1fa3c4e8cbdaf2f37c04e65b. 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/ITUM72000843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aa8b819d6ef76b201555b95fb7ecdc205904983e81aa34733cd066f595d1d4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:01Z), 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/ITUM72000846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fcb7aaadae527795cbbd9fdcd29bdd8256ffceab7d18a4ad74668591638118. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ITUM72000519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589741a9e259e36b4e6cbfd68b7dcc1f42d708097357e9a59fac4152a87b4613. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/ITUM72000849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f03b02c71df8fcb278cb62668c0c74e50f61a154177adfbeacbbfebcfe9d71. 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/FRX872159237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c016d398deb4196d7f854c8f005af93d57a00afb88c8670c6e8aab7edfb393d. 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/IT9VB2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8009ad763a10a43d858c33edff4c5481ca7d75c6ea326699a268f15c8f190. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITQ002300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb89a33e8536b8315ec7dfc4f727163c9866bcf7336c29ff8593fe555105cf4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITQ002300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459d9edf6c77c8f01edb80887ca54a20560eb3cc518105c01e4e90c22ce924c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:14:28Z), 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/ITQ002300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddc258e9748d219dd0438e7c34c66b32a789515565b74065ef97195e24615d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ITQ002300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b190864f6c369b7edff67c622f976181c8fcbcc1e9cb7bfb79a876ed2a573f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITQ002300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226982213b134a91219aab4788790a7ed49b01d6b459ba4b5445c33fb0ad91b2. 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/ITQ002300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a92896fb9104020d5638f4701f3258b02f0d314c194fb49a29657f90b90c767. 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/ITQ002400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b059601dcbd4dc3f64fce35eae0657009a018058e469ddcffd7206fc49ab887. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ITQ002400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc93c3e2e5f9da52163e1131493771c24d18924604bd4d1c79e5aff10c1d2f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ITQ002400807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3050fdbb89425aca82d48d3d23c3b9f17e495acc8ec55c8294e8a868da217eb. 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/TCAFJ2177220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69374b8f7e30bf09ca25e0c68a88e18a81a95ea9810a1339903264eab4178f83. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITGGO2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69374b8f7e30bf09ca25e0c68a88e18a81a95ea9810a1339903264eab4178f83. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITGGO2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5ed22330a215d511e7099bf2251dd2c009c4200db34ce013de36f3d3b9da9. 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/ITUM72000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6ece8ea8a603b21823bd3e55b0fb7e89b66b4cae865f900dfc691fc887ca85. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITDF62077182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9420257d7cbdb9cff638a8f96520e03c2b8073ba5322058753daeaa9b53631. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITDF62077180.
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