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 0x55c2be2433092bfadf90e7dc19a61f8c4d3e46d885e44c02750f4c7663ec674a. 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/96ec79b4-fbd2-4baa-a3bc-0f47f120802d.json and https://artists.proofprofile.net/proofs/artist/96ec79b4-fbd2-4baa-a3bc-0f47f120802d.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 0x43eb4905490ae5d8ddaf533b64d629a00e3d22d5b05a42713aa0aed57232e715. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTAW2241322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c551ee43edb2cfe5a99accf7bcdd8b157c031df7865ce3bd22cc5a12317a13. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:53:43Z), 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/GBLLT2403832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbbb7e4c840a90cdbd3e28816dfa43b153eb9fe7d96de380b0f5e59844c41c9. 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/GBLLT2403833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932e56cfb84d36a783b9d1794b4f0fa8f781441bf6500ff9e7e92a954babac04. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES82402944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a50792cc29b1d388b68f72935eeacac37b686ac423e68e26ef13738e7cd813. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:25Z), 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/QZK6Q2486991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd81b9a10915436b54ee5aba63bf752ec1737acf29000d5dfadb39b50a78e0b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWQ2444470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e3565bbfa24cf4c1793bef6879e326940bb51af465c3cc6f17086c8c91c4b1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB22499330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a6d40801de377bfd79e7ed7ef2cee8300e83931226cb1d00fa51506d2eb8a. 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/QZTBE2428398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a1a56754682059ad74048b9603cff31a63ac943c75429f759f675fb37084ec. 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/QZWFK2403587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5206202e83c79a2afd4639fe1f370eddad8b23d920b26033bdc4703b3ee795cc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ772422122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea547ae6c0b0b0afbd8cba18796f1170f8127466e5ef15c9f2368c9bd66338. 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/DGA072417355.