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 0x9868835605d3027455ec2c9346afe867ca00907dbdf93284392535ecf29f8160. 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/322518de-5c28-45f8-b8a6-1f178c0345ec.json and https://artists.proofprofile.net/proofs/artist/322518de-5c28-45f8-b8a6-1f178c0345ec.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 0x3a143bb1df8d718a4b9924b9b53b6d18ac95d8b2635ae18f76fd262bc73875b5. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/NIKIT2101539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beb6a78d040e83ac5f7673ceb2f6b403774e3eada0e04aefa8024b7efa1543b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NIKIT2101541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd24fbca0319d5d44269a633ce981b5ef5328ec8999a1cf67aef4ca8d596ba33. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/NIKIT2101542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b674267061b9220cc69475e2b014897105aa4b1e30db02a038a76919e4e08. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/NIKIT2101543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310f6f7206e00dd5c407c55f2d7d332983652d7aed2ccd694131028168dbc5f8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTVM2202903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184f533bdfddc01b7eb08b8def9ac3e898c5667b3eb1cb0c6cbbb365e0a253c. 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/BKNKT2300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0314e6346fe607c167687b9ce7d40c3f17ccd4d4e3bc9e5e5a0bb61975c35df9. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/BKNKT2302943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be75720e40e53c429cacdf727e2c7617317e68dcfdfaeb54caf547fbe91dae. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BKNKT2302944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8474201ca704e5767bb3add082d425275b62d134e91f8697b98755264ec743. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BKNKT2302946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45a54532e4fded7f29b4ac1991ff260b051dab8c137f519f1a6079d659a8692. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BKNKT2400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70047a738086670071ed70b4a435e676fd8f90a0b38292b4a0ebee42e581b8a1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BKNKT2401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe2942f84803a575a66bf0c3357a1db8ceef1bfda69191791b7082137c62cb6. 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/BKNKT2404137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a1dde2bbfd1d10324569a6058e7b77fe8c472927addc2f323bdd76049b30e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BKNKT2404139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d723f889e890d4cd2d944f27e82b945dc79502bb128f4d3f2a915155b954e1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/ES28F2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2d0d5ce0f2f205c4ab14cc200cfb49d72e10b24317dfd599d561fb54b33bb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BKNKT2501491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e1add15b4319f7b6bfad7d5ccdcd21b4766338e8f2fea69e161c37fa7ef2b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BKNKT2501492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ce43aa14c85c98ef430239ff29ea144374f76090cf0e02bf2a5ab785f06cf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BKNKT2501493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa613f7e7787fa6c34fafe48838c96e4a67b02857e377923f7fc4698ce50c1a2a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BKNKT2501495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3825a8caee68ad156726599dde1056ecba5e1dff84a5933e58a203c61488e71. 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/BKNKT2502168.