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 0xce224d07f687eaca9f05d5ad677850364e568b8fc0b84bebf73263fc1fc72c72. 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/3b1a6163-5427-4ab1-b203-f21cd4178492.json and https://artists.proofprofile.net/proofs/artist/3b1a6163-5427-4ab1-b203-f21cd4178492.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 0xda8d4ccf907b6f78e9a8dde96648861a83e7b7ddbb69b6b3e479e6bb91d7aed2. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FRZ049701410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2d58bb26e80298b1745c90154c1110846756f403503b58d17971f91fa18a87. 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/FRZ049701090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388bdf52e2f743ed81e6cd9384c6879e7956ab62e2f711ae4d88d30a94d38ed9. 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/FRZ049701420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58ba83282a440eb3de9a3b218af3b348e08333f1b8987f6e666302aa46b976d. 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/FRZ049701210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7471d20cd9c3956cd3079e9e5c4ad117b90b0450113606055ecda183686322d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRZ049701230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa862584f1310cee38a732132f9f53dfd0190de57a361f16dc97384b063ff3da2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRZ049701240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827b7f3baf2ea01fe7c6c1b7ccf3434e1bdb8f745f1612b7017ef947ec3ca421. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRZ049701270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54bdaf0ee3615f8f0b02e3a55654a6f7092e18ea685f07b0e56adac3b92684d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRZ049901440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf285f14055f1c578b033aa82e555276a555eea85301f1c6979abd2d92175ddf. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:11Z), 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/FRZ049901450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28276f52f30a01eb35e553f7911289a6c4567dd1f6d3298e927819a6845a2e6c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:16Z), 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/FRZ040600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956023e1a44ea365c55e7e3b6852fce563452afe7170d88c43d1b158ba3b88cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR9W10801034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3200e397fe797d70f815934b6052c733497dd18fab644ecb1126cf7fdabdd2c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:03Z), 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/FR0U11400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9011f34ee7d7720ca8ea3bac7a95511242953b611d17dbd602126dabd491320. 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/FR50E1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8852c0cc69b83168f80868ef752d1700a041f503ad2630ea19afeefad64d0a2a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR8GV2020050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb550f32bfef137525f745c40a5028c5232a41bebbfce9559a62865d613c871. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/FR8GV2344610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ed5797427d7d2585e131b6a83f461e6ae5f0079606fe88f5dc2097d375e36d. 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/FR8GV2344630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd796b7cdd560cc8ee194eb67de777374fefbdd515aaa3c524aece5271ce12c48. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJM2520728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe17ebf47623bb359817d77d7c8b87aa39f2a518b9cfc7f3a53f90ed7087fead. 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/FR9W11203244.
Classics radio spécial rap français, Vol. 1 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854dfec786fef92bdec007ee4dc01edae187fb5f43fe5a1683ddf407f25e2ac. 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/FR8GV1922860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4749bd384ad65cbc23d372c47f143c35b9fb8fe686c66c15b1be0c4f18fed3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CAA0Q1442118.
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 0xb89ba19b85e5884b03049741952522416dad7ef3ca83cce51f4f47b71447ed25. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FR9KQ1800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c40c31b834ac1a318b65fef9858487502b1549848311bc9d5ddca648d39738. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR8GV1922790.
Les vrais savent, Vol. 3 (L'anthologie du rap français)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77a657ecd0c78d5320a9d664e5593c792c1592c123e969ea9a0a51822258bf2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRW880000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8e8cc76a286f8095340cc0035792571867493d3210c69a57328e08be3c4e7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6I32076752.