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 0x592a2283934bb29d086c7eb68839ea5d9a51f4da0d51ec23992a4bd8e19726a4. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29311841-80a6-4317-ac5a-5737448672a9.json and https://artists.proofprofile.net/proofs/artist/29311841-80a6-4317-ac5a-5737448672a9.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 0x1d247392216060c4adda2ff216a753726338fb60be6bbd9ba42ceed35e69fbfa. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZTAX2406024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a9650d0a6453fb8387e35a2147c14d20ac644c3de99f58197e1ef293b84321. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAX2406025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dc020cde9822bad9f9e94e838a41dbe9a2a6df236c5c62b6549c492793777e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:46:43Z), 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/QZTB52457144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd377bea4c823f4eecbe03608804e650114df4c8017423f2ca2c2aea51b60ffa. 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/QZZ7L2454385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabe0163d841af493b28c92b111a060fcf08b8de32aa418e5fec83fde8ed7a74. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:54Z), 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/QZTB52582805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9e9df93c5330c35a6c5f59e220804edb131310b5059851973a619b61e15de2. 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/QZTB52582806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c9a9cb0ee1e682dc82c7b39021f499ea09022b15e3866709b7604f205d5b42. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB52582808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8ca00ea3f3cf9278ea2e2e036d658c6751d7c7ad9dbd9e6c98af977ba6915. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT6EE2527901.