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 0xb313bdbac37b3430074a8f6f1aee9db2301905bcdad82447374d69c71dae6173. 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/1145cf1c-8a6d-44bd-99ee-d7abb0a36f21.json and https://artists.proofprofile.net/proofs/artist/1145cf1c-8a6d-44bd-99ee-d7abb0a36f21.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 0x0c9a7e5316b1452dae6df969698d937359a8edec7a742ec303eb623057d80faa. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMDA71525282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf7a02d4fac9fa8d0ec7243047fd5240999c1cc4af4f096c226e637ef313208. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFMF1591310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cdd60e372bbc07594d55b75d07cf7a82c4efd4016955b55d0489e0f2bc48b8. 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/QMDA71550808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1162a95d661799a7c32e802323f59099bb655b074f845dc1c826727569bf80c6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMBZ91729669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee73ca2271801a58ef43b3d33c9e5a5bbc0fe8804fee16b0a5bb487348d803b8. 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/QZTVM2339846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e48a80c14c21bbcfabad7f8906f193346127a7b47699539e49d126dda91c34e. 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/QZW9K2393265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e2946b15ef13ff0b6f742470a52b62c2bb9a7eaba9810837b4f81c4dc9f33. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92459490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfaf1241b12095aa2e00566b0039ce304acc1704e01abe48571b1d9f4476630. 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/QZNJV2466902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee73ca2271801a58ef43b3d33c9e5a5bbc0fe8804fee16b0a5bb487348d803b8. 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/QZTVM2339846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641e7bc0a78e1f7907b64c4a58d4ba09d1a783d62edf3f0475f66276c6cef99c. 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/QZ5AB2407130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd70acac827beb00baa40afd4364599ba46a77ec18bff90fa53a408abf44406. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US7VG2525721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e33e08fe0a83b534d0d2744ccaab661dee013c8ebcddbb6e1a5894f1063418. 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/QZNJV2597632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c2ce2d7715e96df413068a32b6cc109218d30f275e7bb91e05ff0811c75388. 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/USDHM1617161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01029352247f64f7a4ae4b14f724f77d77ee7fab5e4671f8acc6aaa4b382c15. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ESA011713122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5224a2d6ab1582ae3f8922467e5568ccdb23952e0c8dabf13a1cdabc51ed4657. 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/TCACA1489813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df29a46ac60985c6a528ccdb4c8fc594311e9b037eed94314efac81a8f10f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA011302120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66427b282b4b290c573ec46a93fa1ec8dc60ca26cac8a8e692152171204baf9f. 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/QZGLS2595959.