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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d8b288ffad5bb788e8c2841b75200fb667bbd074a0a4f4e1c921538086edf4. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/334d4c04-947e-4c94-98d2-fc402742990d.json and https://artists.proofprofile.net/proofs/artist/334d4c04-947e-4c94-98d2-fc402742990d.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe548fbfaecbd5b8bef62f667a551b7ff70f1ea3256b8ad6a56a7025b30a981. 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/FR6V81189206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b15bc72181a682c4901e0ca41f03ef0b449bcb1d814e51f75870d30dc83a4b. 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/USQFK1200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2337133892a4cf85dcb02cedd98e30550fb79ec95040441b4c8142684f375d0. 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/USQFK1200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47c8dc97f4656eb3cda7db88c44191bd185c6dd4a14424cfa5e19564ad952af. 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/USQFK1200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e5557b32bceaf628cbd3c6d2660473a0eb27b1a96d4b12b929a79f536be3c5. 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/USQFK1200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a0b2ed6e26d3543048e9312a8f8e00dbd058e1977d502adc696eba1c8c636a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USQFK1200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a574a3acd88baeacaecc4f335f7bfb21459b5bf3bcd229214f7b7f6028da55a. 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/USQFK1200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea844b9e1eebee29571d09b33c40e34f290b17629911913b0bc36b7bd6682a95. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR6V81048279.
On n'oublie pas - Hommage aux 152 victimes martiniquaises du crash du 16 août 2005
On n'oublie pas (Hommage aux 152 victimes martiniquaises du crash du 16 août 2005)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9421af7cb03772d950392919a77cc62ae436df6c38df731fd8def6ed090ca051. 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/FR9P21301360.
Jeux de dames, Best Of, vol. 1 (Réalisé par Ronald Rubinel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740ddc8ffa9e70917346c1659225631a4668b393f9e93f588f5e2f14a07011ab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR6V80301852.