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 0xff96d47fbf9f6368986fe5f13ea906de1901174b435be35ff684ae8b7dc326e0. 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/9ff2f330-32df-47fd-a607-7e9f0f2e31a0.json and https://artists.proofprofile.net/proofs/artist/9ff2f330-32df-47fd-a607-7e9f0f2e31a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Accordéon : Les plus grands succès, vol. 2
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 0xe734ea76659f17092515a884b3479e90c3b74936a40f808df176cd49e4f02009. 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/FR6V80049026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09f39f23288132c4bd9710ab8549069dd8cf4cc8fdb1188e0917b5ff221ca8c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR6V80049027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7252558fffabdcb2463021b1ca4798e0083da95dd90caf2eed7fa77da3ae9e2. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/FR6V80049074.
Valse du printemps / Le retour des cigognes / Les quais de la Seine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e0b2c2ee1f050c855bb7d59a59dc3c1faafa84365ea775012c249ab120be76. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR6V80049032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb060d282eda896efe420902559458faa49c2c340616dc173d11cd523728a637. 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/FR6V80049038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65380294339894f2c36d1611b0ea4ce0271b5aef42048e9c5551991a35a5ff25. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR6V80032740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2617f4b6d1e50a4ec92186ea2df11682522502d562b99e98fc0a405195734f. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/FR6V80032853.
Accordéon: Les Plus Grands Succès, Vol. 1
Accordéon: Les Plus Grands Succès, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbce62eabe7a4bcd85272c0d4ce0677b784c5820207abebf0201e837f8b936c. 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/FR6V80049186.
Accordéon : Les Plus Grands Succès, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979cfafa606b7dad67b8cf8433379272fd0425a271d2493ed162d48c02d2c55. 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/FR6V80049107.
Accordéon : Les Plus Grands Succès, Vol. 5
Les airs populaires - 100% accordéon (Volume 5)
Les airs populaires - 100% accordéon (Volume 1)
Les airs populaires - 100% accordéon (Volume 4)
Les airs populaires - 100% accordéon (volume 2)
Les airs populaires - 100% accordéon (volume 3)