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 0xc79be8c3df45af6e5a298c3ddc86ce5a0221940961f5e540a01814b0cd4265b1. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2726cb88-92ed-4ead-92c4-81f454ba3ca7.json and https://artists.proofprofile.net/proofs/artist/2726cb88-92ed-4ead-92c4-81f454ba3ca7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SOLO (Original Motion Picture Soundtrack)
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 0x49a20ada5d608e1281f62ec8a3b277ca24204b83931e69d15f66fc6b590ea8fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMEU32308417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047dadd2d7a3063f64157cda746717f39a7b35efec7734d270ee48181e6a1133. 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/QMEU32308420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d01dc5965cf740b35136a94bcf218cf73e7a1a811f674f2fc179e2331d9f93. 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/QMEU32308427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b87b5899718d7afbde4773c2847df824cf62599d2cffdea545c6e759773eee0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMEU32308430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361eb645421eece613638150e4ef9a493321e5b69fad1b248b916a447bbf8ac3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA60L2020002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ce2bfd68c7f4f186140925aa2d5a54b9e2767ce1ce3bc8474fadcfb9d7bf71. 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/CA60L2020001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f128173653f4b0a34a80adf0dc92fdaff9580f3337ef7f682ac31332c6b3b74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA60L2020003.
Plaisirs & terreurs de la vie domestique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57222c565eaf46f0febd07a2ada26e2cefd711ae8d7a7b8bd149867d1312a104. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA60L2130006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb045053ce5c7a0048d00abfb4fa82dcbfa33967f578aa7576b4540d706fdd102. 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/CA60L2130004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e646c55b3bd0ea9fbde3863617088db6a8075db305f776aac76474afb2d34. 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/CA60L2130001.
Les plus grands duos francophones de l'année
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b45301e95a2ee959dcb3c3b3f168c3560805bc04f52eb811871b5d4440411. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA50N2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4604d322cb215e7f16b9dd41a22dc5d06f94603d612f4c981d7786c1db4df. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CA50N2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916aa4b2a2f38389405158bbcc74143973e6bf6104ca0fc6e24fbd55159374d7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA50N2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f6d53de7def262710ec096a47741b54c9abdcc4767d4a84f8d1d267a8be4c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA50N2130001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8183b004e09c200e1df1811d1d8c160d7bf8c122ad5eef9d469fd1cfe3151efb. 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/CA50N2200002.