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 0x4e133f30a915dcb2b9f4fcee3da572b8070448dadbc26bdd55b828bf503e91b1. 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/c5302465-f4e7-4bb7-9052-eb4a0b1ee4bd.json and https://artists.proofprofile.net/proofs/artist/c5302465-f4e7-4bb7-9052-eb4a0b1ee4bd.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 0x19aeff29de47b675e8fb6d3e127e1b2813cc98a8d455391438dcb3f3545a2b45. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:41:37Z), 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/ITL841800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8764aec20370621c8032eafd81340ff54000a8498808f2232f219e3427dd8f. 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/ITL841800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f9ce35b076c996037b2b92e0840964a6047c80d70796cebc36f7233ba58f2c. 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/ITL841800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c66d2634372bc7689c66276897b1dc26637642b220768752df63ede89999d0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:52Z), 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/ITL841800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ddc8301cc231e44a806112aceb2670c24d18aef6e3ff553784fb28225213bb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ITL841800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75005b6a4419389bff2cae2cfcb9d91796aeee8f74a86dbeab1da520c668ce9f. 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/ITL841800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db3119ab788bd7c782aebcf47d569bab1e7034d741f3697a457364de9488e9c. 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/ITL841800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8282621062d54a0252569d20bb88d0fa965a967bc10a553071d6a92d94fb4dc2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:06Z), 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/ITL841800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d22aed45b596246981d9d2dc1007ac101853fb50f63c3669c81bc5114d9ab2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:02Z), 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/ITL841800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5367f2fa13007d1c30b39242751e69d3f7540f7e534a51518d0b63c47b6a2b. 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/ITL841802250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7554fa0625607a809bacbf921ea99f303054fef0e78194d81157c008dcb8b82a. 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/ITL841802450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac525c396074804b50c85dfc31a820483724fde3505d0107f03e932b8c90db. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:43Z), 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/ITL841900759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9ebc559849945054c7a89313ff6f8a426977f987e46cfd536a8e1b16de8498. 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/ITL841900763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e9f4906f6104888d9a3cfbf4adf61e810d9131142ef68200b8c5cb9a0bb12. 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/ITL842500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1317be6187dca80695520ead196e81e32045016d3607e1e29e76dbec04152f8b. 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/ITL842500340.