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 0x3c3103fd5c236505dce792f564f26f9b5040a7c9a2f773e749e00b325b31fb38. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95eb43c5-a24e-42a0-a92d-f2af75d4481b.json and https://artists.proofprofile.net/proofs/artist/95eb43c5-a24e-42a0-a92d-f2af75d4481b.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 0x8b8a3d8f0d6ce98ed026f238f1603d78a7c60c81f18ed16cf8691644e6b2176e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:37Z), 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/FR9W11420147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e0937f9fca23868181e24fa4a0ddc3f589109b0c66c37df5c9bea446ecdbb. 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/FR9W11420148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa43245931f1394aea5c9acd5968721b63481da4b7e8bf4b5adf3e8270fbaa6b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR9W11420152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd373894f5afb307bc3c2345b3165b090722fc9f21b6308ec52687ff6c2d787. 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/FR9W11420154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89718e25a44dded80b02db486092a340cfb590dc9e32627523a6918b7f8eafd3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR9W11802376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eed0f59d4d0266a99333d4610964cd6374022f33d7cee956591f27b7cae2e0. 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/FR9W11802372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb396fa1645ffd24ad84097a29631db2b28f5d7a1ec2b30db13ee4ee5b56c1c1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR9W11802371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c6daf30721dbd7e6d2b71590a2aa80ca447169a9f79f03c80291668e4f4943. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR9W11802370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11099c296094b24b9b5f1bf52e8aab7e840636b56d4be14f2e609a88ce0fa025. 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/FR9W11802369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebceda3c4e474ce1bf552ac9a5ec2de9b7896cbb84ff5990a8d6cd1994a517a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FR9W11802368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bc640ff3e07e426cd2ac4e147f455fed3d243d06314af5f01ac1e65a2e70f1. 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/FR9W12117128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77011f69ac0adbee5a78a66f69204ba356eb2930e17c595daa2070d05c14ed77. 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/FR9W12110466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976685d29ac8e6abdd087f784ca8c6130db7c61fc0cae943c5de63423d97634f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:33:42Z), 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/FR9W12110516.
Cachemire - Dernier essai (Édition deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2600782cd1bd012708ae3e092185ffa67763d1dc0d2713e5a45ad22478135994. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR19X2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464433414d71553d48a989cc73de4eb62f6eea4dbb41089d3f66f2b61ae996a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR19X2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08366fa51791a0796df6758233788c10e36e9367c2a94cf8ff6bb9cb2951ea7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR19X2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8696ec7d315b9d99bf77ada6d58f383c8f35b5fc2139e0aa4c394e35127b34c6. 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/FR19X2400021.