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 0x2f2fd60d04501d0423967ad250f4f937369a956f65e2b8565d3b4f5d0de33bf1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e64cbc-b809-41bf-ae0a-599fd0c4398b.json and https://artists.proofprofile.net/proofs/artist/e7e64cbc-b809-41bf-ae0a-599fd0c4398b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bebaa583325ca2b48c2baf5f6add3a4a0df3ff961664a42d948a82c609df753. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMDA62425165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ad0ee2c82ae0e3da2c77cc8e8f81afb5668db4ea9a9616aa2be96a801d24ba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:07Z), 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/USA2P2516644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bff8aa4aaa2e487ebd608ad338bde1f9fb065c3626d431c331b5a497673155. 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/QZ5FN2130272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ffda48081865a2795a46a1c85d8b836ab98a2ae2d7bf32eaebd08f34d2896. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INSK92401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39463cc5043b22872130b883c7527407baf9d1cefc422daa29046f4ebf1c490f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INE182220177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec4fa88475d02dc2f38899101d70262ced29d913991e11107166a6d0bc86212. 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/INE182220206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898fb4efa317c98ed2f0e1013e394717737bef0abf1b6285d62d68745e39397. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INH412211914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec46558d029985323731e49c846d41f76c41c1bd14112b8c5616906bc00a7e7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH412212560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087224c686e4a32448aec212ae8b0a3550f38d2d24b9722ab4e6cf8c04e5e109. 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/INH412213014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085318c1096bd78a15a6533f8a1252a55609b45ecced02a96d068b2128101261. 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/INH412213339.