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 0x3d3054ecc456c01caa182f93175cb9c6b02b2b882726c6e9aa9eb32e20053346. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c4959f4-1fe1-462f-8423-536839a9c89b.json and https://artists.proofprofile.net/proofs/artist/5c4959f4-1fe1-462f-8423-536839a9c89b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chantre de la négritude et sa guitare africaine (Bolibana Collection)
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 0xa7608e06c08d3efe5f6dd930898a3ff0c1443ca29b09bdf3dcd1c351cd903889. 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/FR3GQ1101970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c21285596c9828d54e2aa651002795567c95895755b33b2514b0d4705500a6. 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/FR3GQ1101980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d719dae9db87519772ec1fe8fe232677326c38cd2f87601a8d78f2a2297cc14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR3GQ1101990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8a3d1f24cc181fcbf98a030f4bb0687c362fa32a469bf3ceba08aaaa7fbef. 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/FR3GQ1102000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e68db4fcf00245d34aa10f99fb8b0a3f024d9abf9dd8bdfdbab15e2926b03e. 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/FR3GQ1102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec797c40bd041a7754ee15e2d08633fd969cbf1871e6d761a83e926a6b4970c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR3GQ1102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0455938c8fd77eff9605f640d2954c7514cd8f7a6bd0ac56d4af62f6bb8e26. 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/FR3GQ1102030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f0ce8f40abaef867d7374d1dcb7094685bf55fb7bb6a37b65bc5b3264f0cf7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR3GQ1102040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8dbffc4181b2a799e454c526fa5000b66b9af977272dc16978b8c4b9c25194. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:53Z), 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/FR3GQ1102050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4e392f646dd381b6e7ce3b4f3ff85a9238ce1f1d2f23ea22a0a5fd6ee3e3b2. 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/FR3GQ1102060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095e4631b61ab24783b3b45e5c4426495e10fc986d4122818b6fb417bccc6ca7. 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/FR3GQ1102070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082533ff2eef1fed73baad96ad0efaa6b5761e048011eee5a3696908c2355ab4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR3GQ1102080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4e3c4f0dcc96ec011053b7918181289db0b2b28908f881e3ea4821b71cffb8. 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/FR3GQ1102090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd0e37e31c877c8d409a504e4c513f1761688675135da9fbdec5821d48c4d9. 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/FR3GQ1102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c4015219370fc1fad40064a6d19efa17da9b7c3fbb88455f5069568d0dbce. 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/FR3GQ1102120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974be68eff37ab85f299b30a4b78c9f50a63bb6c45862fb77680b32242952f62. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR3GQ1102100.
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
Chantre De La Négritude Et Sa Guitare Africaine
Benin Passion, Vol. 2 (Le meilleur des années 60 au Bénin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcc853477f3ec9bb611f75ef9ce0aa07840fbad8c319200749e796251ed092b. 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/FR3GQ1101600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92937073d069e629af8a0e3429d9f291534920320d714a38d109a122717e8227. 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/FR3GQ1101610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1765632bacfa5d24c153270972c28f63229c12c6bc03b47f84bd32edb5cb3605. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR3GQ1101620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3f90a0b5f83972380c6e0dc54f867128f1febd03040c9aa6ccf9c5fe4f165. 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/FR3GQ1101640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d379d5ca905a549391b45ae3cf54b6f95d604b985ec66e3e7c701fa0288552. 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/FR3GQ1101660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee441afd127a9fb47be1d1d43e8ad99be0fd78ce2de85739854d7531aa17d1. 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/FR3GQ1101670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7944d19ab7050e119bfaa0e3ef8660ee24707b6ebf01c5a9902a560b5bd48086. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR3GQ1101680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373022c896bfc47c2e7af11bf23583b55054cb9da2abaea5d7d2a51d9c697ad9. 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/FR3GQ1101690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc86d999bcfb26238f6302673f1501f41bf41d931a0e58869c257023f9a5f61. 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/FR3GQ1101720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f25d4ed520d275ec49e1adae9f35f2397326c4e1bc4ae4f610228904aee35f3. 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/FR3GQ1101730.