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 0x3fb68015149637cf3cb814a135fc34d7f126e3530f39881435955088d6ac3516. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abd0240b-a802-4a8c-a377-6ab252b20054.json and https://artists.proofprofile.net/proofs/artist/abd0240b-a802-4a8c-a377-6ab252b20054.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Urban Pulse - Rhythms and Sounds from the Roaring City
Mythology - A Musical Odyssey Through Ancient Legends
Early Music Bangers - Unequal Temperament, Equal Energy
Philidor: Les Amazones: "Venez, troupe guerrière" - "Puisque tout est tranquille" - "Combattons, courrons à la gloire" (Thalestris, Hippolyte)
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 0x9353af46dda4e45d6687d63d1e3d658e2621e658c5a8a723edf21033cfaa9f4c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBAYC2003390.
Départ en campagne - La Marche: La Générale de la garde française
Francoeur : Symphonies - Philidor : Marches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bd09ed1698cbe4793c85402ea1f28f34a32939906a92e793519f4ea3aac565. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FRQ999400066.
Départ en campagne - La Marche: L'assemblée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccd6aeb8317a6e17e9bd62c3654580a6d14bcf574d226310142b0691e6c287a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRQ999400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016456747c444bb623ca88ee9963d19b43db10cb91c13a6130c98e4724776a0e. 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/FRQ999400071.
Bruits de guerre: La Marche Royale 'Cette marche est celle que le Roy David jouait devant l'arche d'alliance sur la harpe'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3595517b0e69c9088bcf47da2ea031694d96c44d6b6a9490e756bbc95c7c0001. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FRQ999400076.