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 0xd13dbd0afbde848ae225665ae4c28abc81c13328b39cbd090de9b9257d430540. 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/8208ade4-6b78-413e-84c8-a134c05e7336.json and https://artists.proofprofile.net/proofs/artist/8208ade4-6b78-413e-84c8-a134c05e7336.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 0xe41426888220616714b35fe13ff3ae9f0333d8ced562f81d4c8246f5461c64aa. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/NL4NL2116965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6f21d11d10256cbabe5b94fe28ff5f72e16454ab92d6644908a62655035959. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NL4NL2116966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1781437134c4deb84f7c02c8d9b546b0ea0a918065e0620db018c2af1decd6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/NL4NL2116967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b44ca1805fb35f357f6f2c2b77541405a5331210f3dbd7c05b478ec61e98d8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NL4NL2116969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95de5f53e485f8ca46f6f3dfa2c3890f0b83c5c56143c130550fe12b9691e6b1. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/NL4NL2116972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b87c0ef2260eeab364670f30e2adc15cc065d81198a795fab9124af5551276. 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/NL4NL2116973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05c49dce94e981f8b0194cf4e2933aea09177ede36807b77dcf7c15717a058. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NL4NL2116974.
Autobiographie selective (Gouinasse gauchiasse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a39ed0a9af58cf426aae585c66fc35d0aece097302ea817961b07b938f411c0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NL4NL2116975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fff08da9f619012c371ff5f04567b3940324933f09c675adcc51427197bd56. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAGX2310190.
Nous n'avons jamais été aussi vieux qu'aujourd'hui
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610f1a84b89428d339807c4dbed7c8c9563bfaec5e27837f62c8efeafa1f4884. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAJB2412734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e6b4fdad3ace6d72f4892d01684c15b55c857bee91c44a13b2119f7b0d73fe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAJB2412710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c3bbeacb3c339f00a71345423dbc1a11ec83a8c87654c1a4449a7a99328129. 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/TCAJB2412758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e21bd6437143347012f81c8984f345ca7e4a8be54069a12869038db74a02935. 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/TCAJB2412775.
La retraite - Ultramoderne - Chiptune remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de12e35274d01d1ae22a56058485c60499bf3041fbea8d660360fa0a742122c. 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/FRDZC2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc18cc037d3706c9d6727292248b340f30d992fe159cc4b93464a90e604eb5f1. 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/FRR641800385.