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 0x04a81d9bafc89aa53136815b4f7f6e443950ce205f61437ae4d53e706b30e195. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c88b551-7eb4-48f0-bbb1-c9b4d0a51933.json and https://artists.proofprofile.net/proofs/artist/8c88b551-7eb4-48f0-bbb1-c9b4d0a51933.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clarinet Trio in A Minor, Op. 40: I. Mäßig schnell
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 0xabf196b225698529bcb5b6f5e74dce40ed49b74afefc5a7f254058b0b7a7351d. 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/NLY331801584.
Quatuor pour la fin du Temps: I. Liturgie de Cristal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9cdfcd2f1287a176a4f3363fbea5cb4654d71d7c4bc72b633242ae9993951. 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/NLY332401909.
Quatuor pour la fin du Temps: II. Vocalise, pour l'ange qui annonce la fin du Temps
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29a190805e3b4153bfc5852ea7987d06dc316d91edfd18666e359c53586b632. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLY332401910.
Quatuor pour la fin du Temps: VI. Danse de la fureur, pour les sept Trompettes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e56ff2f459fe2f5446db2f14b7c5840e02b5d06a3518095b90bb4cf5e67be0. 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/NLY332401914.
Quatuor pour la fin du Temps: III. Abime des Oiseaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea10236f4f185cc2d6ad017b149fa673d48ec04d604f6343d0887cea3d0aca1. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/NLY332401911.
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
Quatuor pour la fin du Temps: IV. Intermède
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7b8595084d567b22141f7fc354ed5b495394b71a3e6fe9c49ab37946ea7548. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLY332401912.
Quatuor pour la fin du Temps: V. Louange á l'éternité de Jésus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d0cf4b7c1325977b1b25906762d25ea24a9027363d444a2d84c13aa8a1511. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLY332401913.
Quatuor pour la fin du Temps: VII. Fouillis d'arcs-En-Ciel, pour l'ange qui annonce la fin du Temps
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b1f84131ee038809c3a3d5417b9f1262cfc45aa179dc0c8e4c14783052bb1a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLY332401915.
Quatuor pour la fin du Temps: VIII. Louange á l'Immortalité de Jésus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f94c5b9f6fcbb5c20d4ec0b2c94d997fd0714311285f21ee4592a8d60b2da. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/NLY332401916.