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 0xb712a350a27b8772410eb6cb30e771eddbf8f8d7c8228b72e0b98859633da2b2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/437bcd63-bb73-4316-b8e9-5f01768ca02b.json and https://artists.proofprofile.net/proofs/artist/437bcd63-bb73-4316-b8e9-5f01768ca02b.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 0x8d0ec81c11aa51d53552e6d40884cbdcab67f171a5896a6f8c080a0a3e9d22e8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UK6821803941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f227c4b7f78d5d8ed4b2529c2a0010c38ef509ac6b34e02cb595755234488a6. 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/UK6821803942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63756b15760bda28b21266c72458029cf3be46d16e9252d8fbf9743c9b53c99. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES81940832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb99dab022bb902be50699764000fa53cf046d62f244e60e25a8dda3f4b7a81. 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/QZES81940835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659115f629cfd14ddc71938cecf13841efa821ccebf1f87a5d7d65608c1904f9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:31:00Z), 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/QZTH92108792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d48615875e5f8432602b679c110f9e294bc1c37952e2cacb4d26eed5a3f921d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ22320427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bdd97e474cab4e69fb0a01c2289ea224bffdfd919cb471bc765167e6b7466c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAS2206848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381b21823af77b7f379658bb8bd50d1128eacd18ad6e15651a2ba446156d0b9e. 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/QZFZ22320428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ecfeb823bb2eaf798c14dabf092aae11c1494d8b00059c606b4bf18053e0b. 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/QZFZ22320430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5df6fc939acd825461c0e453c0bfe0a1fe6820d4a4bdc010d464458e9f1a4. 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/QM42K2363362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bc94990a7b72993ec64aa4c774baff6c209f24ec782129bc7f31fb69b8fba1. 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/QZTB42357112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8e94ea1bf2bc8e9dc2a37976f0afd719898b8d4f9e0d572fd6e996d9f2d1e8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA82527899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012008481f79a0b2318904f756f7fe6696e6358a3733def5f5b130b64953d988. 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/UK6821653567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c26101e8cf3d83e5eed0dbc751061425714a0f105b30b2c42e39ee68cf4ab7. 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/QZVK62400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf76bf66ecc7e6cd989acc0e1d0f9b19452ac1c6d21a57b39d801f8fc4fdd4. 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/UK6821653541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5df6fc939acd825461c0e453c0bfe0a1fe6820d4a4bdc010d464458e9f1a4. 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/QM42K2363362.