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 0x040e65d940cb68b33eb88a772ff1400758f4006198cf1f0707c96fd97cd6108e. 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/38851686-98e4-44cb-87ac-400b55a0f9f1.json and https://artists.proofprofile.net/proofs/artist/38851686-98e4-44cb-87ac-400b55a0f9f1.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 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 0xe88dcab170ba94150a0c6cdf1c9e731b828988741a7980414a424c3a031b4f6e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US25L1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4c6b04291b46dd577282ae8d8b9b7bd4495c955a9439f330544ff1647e0e3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US25L1700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fc17c09e1428146f41b567ac6e6eba9060a56876bf4937ac1cd107caba8bf0. 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/US25L1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d37988133ee3b5201263e1b0a3971c9c3f1c9a9adef51ab0feeeb21dcbe8fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADW1887810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47787aef150719d309809db1fd3645ababa0985d61793223ccf8f62754c4ce16. 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/TCAFM2146593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df41b0c10c31312b3cc50b23e9106ef5d47f3ac2e171fa5da481a0d146d35f3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFM2146596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64fead1218deb9457325fbd098b7b440cb5704118ce34d2b73e2b4708c3e1e8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFM2146597.
Mon âme (Quand je contemple ta sainteté)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf2ee41684c89721f0bf12d0a7fd493ae8e76b4953e9ec280201f6c58cf2ccc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGXC2300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e5a45fa2dd162cde382e30702805690a469332091c1620653ac00e4481f22. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US25L2500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31042bc55f129224e83e10fdb89b129c9419bd0ec7fbcf9212a3269021188b1a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US25L2500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff5c37d3c73f6076f5401623eeeffb009840bac2e49afb05ea5386185d90658. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US25L2500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4872eda915f00aefb8c29dc60a359b4776080c68119b2a839ab76edcbc559b06. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US25L2500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba48a475be3b3658983dc4f48e05f444d0d9fe3dca034ff949816beeecb6301. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/US25L2500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90039853cc97d41242055c36470c0943b00c64ff5a5e839a43cdba4bcd167fb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US25L1700986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b2814fee06e557ad2845df86ed4b7691c42939cef666f5bc8357a7bbd6544a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAID2491517.