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 0x318c45fd56713055e78c0579ccc2ac5be176a3f68fd388846c89b2ee5de2d7bf. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5b78ab0-e443-4d3d-a010-23668f81a561.json and https://artists.proofprofile.net/proofs/artist/d5b78ab0-e443-4d3d-a010-23668f81a561.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 0x10cba4851354055fb98a7b1b86ef4bb7f71dd40a342d792e4a00d8bf10b03e12. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BER182076301.
Pièce de viole, Suite No. 4 en Sol Mineur: Le carillon de Passy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663b9062da8faaf5601841a0712843d4ffa66b78adb929040df27ae81464851. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BER182076302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f1da211bc2cfb4551d59b935696364be0590e9a477270bbd58c307706444b. 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/BER182076303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de055f9928f59c36b9780eb769d6e96fb761995f2e0d41d870773431ef51108. 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/BER182076304.
3e livre de pièce de viole, suite No. 6 en Sol Mineur: Le moulinet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad45bd7b4e7b191af5f3fe4f4241dfdda7b8e94ce7d4bd303aeabee7dfd8f9d. 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/BER182076305.
Nouh Al Hamam / 5e livre de pièces de viole, Suite No. 1 en La Mineur: Rondeau moitié pincé et moitié coup d'archet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b3d97e6b61318bdf7b7922df46b9f1722d21134bc97f42f6fa0d130033da90. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BER182076306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da56cd1c94745534531c3f822248055babb1f5ef0a5df977ebf6699e8119f4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BER182076307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6212c6bb52e12069d8e8e1f8f4fa6bdefdc53a8ac2132b14ac6eac1fd925eaf7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BER182076308.
4e livre de pièces de viole, Suite d'un goût étranger: Le badinage / La Talumi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a086bd7ffd0a86c9317b3d059e76dc163476c6b22309618d7dbed9e6ea8a089. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BER182076309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09185ff04ce5f76bdf4acade0d4432738aa62f52a2a165cf63a40bd17bacfd7e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BER182076310.
Jaa Rasoul / 5e livre de pièces de viole, Suite No. 3 en Fa Mineur: Prélude en harpegement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e5f725e1c5753c49a1cc3778aea546e661ef00220f80d2197f34ea0255bcec. 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/BER182076311.
Prélude en sol / Dama Daiman / Raga Bhairavi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb655e2f34182479bb3a1b053d29afe7db813899f0a8dca6d15c4c426db4b1f9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:20:34Z), 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/BER182076312.
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
2e livre de pièce de viole, Suite No.1 en Ré Mineur: Les folies d'Espagne / Shahoubat Rouhy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9de22c633669e4947d840df7caf9f93f94269c253c00d66fdddb2a47d02b0ab. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BER182076313.