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 0x420b69982c0fd776f23bdd4581fcaf758d036741df3bb98a14d6f16f7c31b0a1. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe775751-5b45-4a4c-a83a-43be5736b4a8.json and https://artists.proofprofile.net/proofs/artist/fe775751-5b45-4a4c-a83a-43be5736b4a8.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 0x70647bea2bb9e4ae63656d7bc7c677a13e420fdbfe43fef0e89d02171cc921d3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWY2571850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f75cf6cce38bf57bb15b1747d9848f134bc5e45ec9254eed107c7972f2b999. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:00Z), 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/QZNWY2571851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd503d04fda76200f133f5f5c83a52c5108a2a08d79ab66a4031766c0e13f8e32. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:55Z), 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/QZNWY2571852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd8e4a16afc4a9a1dc411fd337c067c684bdbf52ca22c6eb6c85e945df15b36. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWY2571853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e94e330f159dd4696e124c181be4cfdb9789a4c6f2b21988a10aed21680a44. 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/QZNWY2571854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d88123f1d3a7390df031ceeae924b55e7c46158c87b9e5ff565694da0fd4d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:36Z), 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/QZNWY2571855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21757e812c81dff2276f38bea80c53b8e5883caf36d0aca34126bb9803ebd5cc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWY2571856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb67808436318f1dae2693a97870982b5f739186e44fa9a3ec2815a850dbe6b2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWY2571857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a66c746b61066809497beeee7544d37ac82c2278e2164725c573576e3c60ddf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWY2571858.