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 0x2786429435ce82b8a6828f95a9a7eac358b83428b4672297b8408b1524e7e84a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/511c0cfc-2a5c-4a88-97c2-6b5510c84ace.json and https://artists.proofprofile.net/proofs/artist/511c0cfc-2a5c-4a88-97c2-6b5510c84ace.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 0xeaf597f9360161537b4b48187a09c851946caea9de9ad53c9aaba02dfa27f05c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ71938368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2226a07b61ee573d91d298a113d7ca81fb24acc9c9c46955de057dde1e8941ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN91903626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676e014a80fef184c860f2b7a7c3a35ccfab329eb50acb3beb7c848b99716fc6. 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/QZHNA1914638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009fadd88ded794d50d812d21d481f771a34edbef3755e5d5857ea48b5f10028. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:33Z), 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/QZFZ62043650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da938cdc2bf08f14c4ac4ae39cf758d0eb6f7e4693ab34c37fdba6806ebbecb. 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/QZDA82080996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7409a5efd6b58b64f4079c48e251a9076dacfe205aad9324d71f2cf4786ad693. 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/QZHN42069769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc603c62f44a076cdad9194b1812ecfba7efe8143b987043353c0fc7d6090c007. 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/QZK6G2037829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4eb91493dfade652621ba5710b8e02d13bb06f78fb8787ec0642617a951fb8. 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/QZNWQ2096902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad7d579920d490adccd1684c0b6306d5b794720e3d4e299c252cfad96923be. 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/QZNWT2027113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b56aa4152821929427deeead47f616e9f8a804200793575010a50fef5704402. 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/AR03G2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528b98c91a98c762dc660419dae609d1c4f4597285ba1704be9fdee94f92cfa3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AR03G2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38364f1dd105799bb87334caa85a5dd5f11644a91979bf4d7a86afb339ce2b06. 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/QZHN62226733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17d95dd5fb239bc093cb9f7a30747c68bdf2bf8c74013d37cb05cba5ef7eb8. 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/QZK6H2251271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0feae3c97150846e606ed211452643cda70ad2d22a59bc8d4ded206860c3d9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZRP42290422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb210efc8d05616b96045dc37ccf8c21b04ebdc00c70232642151a300182d4f06. 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/QZNWV2402724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aec6a5de73d041c28007b3600cc5b1ac10b6363550ab9cf757d42d5eec481b. 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/QZNWV2402725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014464dd702812f4a44e0f59a647842b7a23802520313c97c8ed51f151b55b7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNWV2402726.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b6e7448783a13c915af0983df773156a938565d6d6d6125daf37e2e9ff4181. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNWV2402727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528f1fe82ac4af084aa8f7363b08abab095d4594e7c4f97986a6a751156b62fa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7U2416420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66172924dedfec12868661afcef4069261956f50b01792543efef00a8176bba7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:03:33Z), 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/QZFYY2588527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae9c21e6cd55f80e32bc969243347292efd4a1e0597f6fc2058247eb0c50f75. 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/QZHNC2594863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4653c63dc789a3709ab29cd2b1803db5fedcd7849ccacbb9898953812f54b47b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTAT2528741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e394fc2cb41ab3214563085b538f5c616299021306454f3f73c79e9325918f7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:53Z), 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/QZTB62520667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91266d3f3ca39135e0c348285f9623fa1ec1c268436b8955b95952d878ec16a9. 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/QZTBF2543795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6162fd4f71e2ea61984233cbe1502269478735ccd78fcdbbcc3098eb57682bc7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7X2593164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe90bf2ec5918ad66ffd4528ccb26e09e97f25eb13d6e34fb51b0cf6191f29ee. 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/QMDA62147953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633817df517da85b01395effc31e81db4ca3212f07ffda92029b9be4ab4d03a9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USP6L2201350.
Octavos de Final (Tata vs. Kusa 草) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ef5055408e5acd77697a9e0e2113ccae1de5a21d30cb2ed41ecdcd79e4b63. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ATRG72006916.