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 0xca8aed08ae06418c43a5548817930039c1e88ca0649b252d342666dc0cede207. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03678e88-7bea-4d85-945f-f5881c924fd6.json and https://artists.proofprofile.net/proofs/artist/03678e88-7bea-4d85-945f-f5881c924fd6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1re Quadrille in C major, op. 53: Pantalon
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 0x6a5ca8d841bfdb49750c79fe3585e704386f82deaec030c2558dc2e67d7f26eb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX8LD2234083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb932c41649bca96a63c4182b38af4512f425d62ec2bc9292050991d070eecdb5. 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/GX8LD2299984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2718a54bc1dd883b14e5aa1020ffe95e653545073ed799b073687cdb4e05e19b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX8LD2262177.
1re Quadrille in E major, op. 53: Trenis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4f4a243aaf1ae19b5566171ec85f6446bdd4118153964308fa4c3589e1be66. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GX8LD2218625.
1re Quadrille in A major, op. 53: Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5442454d4cce9010ea125fffe812a55e570d9d9b6cdf9fa9108227fe3992d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX8LD2202683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527edf1cdcbbc556c167f160a9967d4828daca5e91e01d89b24de00a959f6657. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LD2261555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51dc6300d7000547ca77d5a921422a1f9d7c16633beea7b91ca0822a2d44025. 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/GX8LD2211537.
2me Quadrille in D major, op. 53: Pantalon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa174bad020fd746fc3a67ceb56a0cdf9681561d1435e014e479c0d3b35d3b8c1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PLC062362035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536c83813d75af1bc48e2a52861a3c32047c78c36b4cc06f09658829c6be554b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PLC062362036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24394ee90777d563df9c154210fac963f06a473b7e92942d719b2ccfb3127f34. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLC062362037.
2me Quadrille in A major, op. 53: Pastourelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72576f6ec95a3ac8e339764f314dfa7c67293f14d5c3a37e48287871a0e4c8bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062362038.
2me Quadrille in D major, op. 53: Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6960be92c79edd1865bd9cf15f4f70c1232915d84510e0c49d8795138762e220. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLC062362039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b0f913d3cf58324f1d6d7bc9b721191585e30e90d89c33626c51e10cf4d14. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLC062362040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b346fd52724ff202cc2652f292b120b4b351d5b9c050bf27858eebc0dc94f92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC062362041.