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 0xdf329b45231d4663924e530efe50e0a3d6d0167a1eb529eb655f4ec200a76e67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e91c1e05-999a-4b53-8a25-892f4f38c18f.json and https://artists.proofprofile.net/proofs/artist/e91c1e05-999a-4b53-8a25-892f4f38c18f.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 0x8d0ff40fa7e94ab50a6dbd32137e03d042d66cd48b73af45a9ed3de880951d8b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:24:09Z), 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/CAG609998403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b54ceff7c356c016308fa8f9643a151811ae2e74048f893436a9ad1777deee. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:30:13Z), 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/CAG609998405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaf2dde8668decebebfe36204390deffcc05008d4a9f84d325e4baa07210ac9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:32:48Z), 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/CAG609998410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf09e1b538dd819e4c5e1918a0f1cf305871571f30c6bc7a25bd6b378255e43. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:19Z), 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/CAG600712310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a1a2838d7a0b5080e0fc79cd0fe948c74ad3c08d9ccc4a2750b2cc44a1f23. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:39:55Z), 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/CAG600823703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a0c08b4634145d1d80872766b1b133e3a78cfcf7184d36e0ee91c9c1a37c96. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:53:50Z), 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/CAG600823713.
Embarques-tu ? (Single Version) (Single Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36554b5a780222660bd93a3cbb0489bd7ec176c3e6515e44b19ad3f72eb58a. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/CADC41411897.
Les grands déçus domptés du grand lundi docile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd6341f9d9e8f14c7c1967f286547798d8742e90cba98f27e44d55e8035b14e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:04Z), 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/CAG609998401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc666c182888f1034a0fa26537f5165e15a599bc09ce272d1ef20da759c6e80b2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CAB642500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1ad803f814fe145ee72c0b4b3b05dfa13698576a25217f5f7ffceca08adfb0. 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/CAQ521096019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1658e5136f58abe8548f7b4f4a9bbe02d5b2e6879507a163aebd91ff53cbc77d. 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/FR6V80625321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1c3a3aa20a7fc0f232fc0a03591f69dbe8e346e65e7531242c4d747fa72bc1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAD941083404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf577ce2321b22e750c2518a3bfbe9b9dda97034fcdc101bc6262b72e62eb82ab. 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/CAD941083410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bc0f3d62f18f99f6e62932f2e0b531c4a6a08d691b5605ad7dd96c5746db34. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAK861900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d9bd6e77156de5ebb5d8971f35fe137b566117f77125d35e0cd2e017109e8. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CAQ521096016.
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 0xc2445ad299cbfaccea50cb0331d7f96924c7e5afb788babf7cf235e49ba90136. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CAD941083408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7f0287e4d1e5a832b995807cb6b7c290ed84a9b91673646f25c9b66c7aa42b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CAA501943010.
Festival en chanson de Petite-Vallée [Deviens-tu c'que t'as voulu? (L'année Daniel Boucher)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bf6ddee3ad082fc56004cadc84a285d5e4f0aeb80c3818e225561bdc865068. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CAV700819503.