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 0xb3c92358d9158bc9cd07ca77b9f7c7f79df678eb10d006694d4ac14501a5fd07. 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/1622409b-08e2-4748-9dc6-8de643971fec.json and https://artists.proofprofile.net/proofs/artist/1622409b-08e2-4748-9dc6-8de643971fec.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 0x6e1c764c5c8076521ff43952ba669f64374aaa2d4a026e0d383d4f34a8f249e9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:09:57Z), 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/TCAAY1169080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a173834aa8627dd8a2aea7735de89bab22ec042181e62805dd0dc8e9d21ce30. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAAY1169084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a97c82035c7cbc33fbf04dc23b85de2ad25050390450c36d0921f99fd8ca1. 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/TCAAY1169087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24d26d58c9d0d987d9308c846bb043f82f7181a27f28df05fda898c3720974. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAAY1169088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a1521f4bb267c4e6a6839af4f521fd6b83fa2a03d863816c980d39ea1ecb68. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USTC50821043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67886940c6ca7454312a723451513a7ab9ee52ed276e4e77e63e5370feda2a0a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:43Z), 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/USFVZ1550036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a341ff57fb43418e3c2728afab6e8cc693f9bde9da473bf6328bfc178461bcc. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USFVZ1550037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f43ed0618b44ee0f0fc9c1a0b1b1575c3ab10cc033ae0e4a19d76afdcea014. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USFVZ1550038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99cc37e38046246bdd5704cca30242c6b5a8ca1e09c4e9baade5ad3a17878d8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:40Z), 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/USFVZ1550040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40045ccacccfb3b9c91963623c498de7346e9a0fabb38a82b15d3fdf9dcf54d1. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:54Z), 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/USFVZ1550042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8337647b2b118a7d2ebf77661040313f3e00bf6d2be68ab192211f461b9d875a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USFVZ1550043.