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 0x2c7b97e8a4eeb5330d673aee42eec66b4bb2ba97f6121bbf3a3e2f43259e0465. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7876a8c-95f6-45e5-b54d-e6d3b6899a73.json and https://artists.proofprofile.net/proofs/artist/f7876a8c-95f6-45e5-b54d-e6d3b6899a73.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 0xacb0313065fe35c275d477006e309f3e3860eb6007286c5ab0ac0db19a2e7186. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZS632487925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe865d41558c9bea7a4f0235b99d872d7a06b620ca5315fe97005654926e73b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZS632414834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19470c76316d159bde5757e58eec95766d2db681effb3296520ff78406aee478. 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/QZMHL2406406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cca22f3a7ef8fa2d16f4fd6953f172f60d080e4fb9e1ffae0183c8aad153f4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:51:20Z), 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/QZS652408960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cc90520b9596c295c5de8b341e26d665689c8512bd72132221076914d00f22. 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/QZMHM2422538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58ab37fddf53db68adb6a5680c1b5cdb3a0993d46120e53aba0b681de663908. 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/QZMHK2466484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7dcc602ac34da32ff1196dd5e1d677973902fa98b67cabdae791c4c452275. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:46Z), 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/QZMHM2470005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7b86493e2fe81d67dee8beeef82563114576a4e86190303fe2ededca36d92a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:08Z), 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/QZMHK2457915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e93263353670edc81b727c0e64fbd020d244cd72b05ca73226a6f7106c18e2a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZMHP2486176.