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 0x7391092a8eb9574e89582658419d9dd913035837bac313c98fc1fda5f16938f1. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63fba8de-f8fa-4369-b9ba-0e194139483b.json and https://artists.proofprofile.net/proofs/artist/63fba8de-f8fa-4369-b9ba-0e194139483b.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 0xbfc701a4707e2aa61c741953549b1870dd54c8a8045919d525566c5982b9a4df. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SEXAT2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f90ea82f825222c3b1cca94f40bc6e78aa0c671a18dac422c4db659f15f979. 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/SEXAT2201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c7a07f2cd5887bec083e12fb43810b1090335ce4d7262c85dd5e042a72e921. 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/SEXAT2201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38d0342fe8de8e5eb74de5842ff954b4a3f1a29d7137d56f6163d975978910. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SEXAT2201211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f249a894498a3f988ff0b3235780d875cbc0cc3a95af1f5acc56481544dbce9. 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/SEXAT2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4c3372002ec26298569b14d85e26f4212e1d90ca86abd6f8f75435b21afbcb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/SEXAT2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c29faacff0737c879139c6245dd94b61712e1daebe7c229478ce312af3654. 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/SEXAT2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc176f68cbe67b845f94c63657b67f003a1b37888ed8df31e4c40e44d668280b. 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/SEXAT2400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caede61fbc4b67cfc8eca1b9e820d6d67119e2a370c417fcfb75eb48ced2f2b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SEXAT2400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22067fa0d00edbb3db8e1baa0f45ac2582bf81501fb3820e6f080acbb2f2469. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:56Z), 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/SEXAT2505501.