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 0x85654b3c73830d4a530e9d11045c9c400f6004a596d4297fb8f136307050be3d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41213596-e60c-4eb6-a732-ff4c742bc007.json and https://artists.proofprofile.net/proofs/artist/41213596-e60c-4eb6-a732-ff4c742bc007.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 0x8c1e5290b8a52df1c843dc677df645664b6106573f86c26f087fd481544d4abb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ZABYX1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e9b7ba11589a607592da27bb9f81689b944bb92dc5b2deb9151088dcca9c1b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZES62062366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec7d12c8144c951c369ad7f35f38b28197adebf782d91f86d3972e7df2b9572. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES52075534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e501d18d37b5b345b3de003d00fcfaa46f8f80137c0ff2828ad50debc42a26. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:54Z), 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/ZABYX1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38b1bda717e143d7195e62b49944321358b2f03c35b7b07a188086b8ac0801b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA72016986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf665ad8effe84ddb02934bb755300f4a47d74ab7eafdc5905b58df27ca3b5f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:21Z), 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/ZABYX2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384926ead848ad8d46efad2cca4684c1344e1a3670103969466c4e630b36d1bc. 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/QZES52014410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fc93c321f1e99451afc651fa15ac3046b5f0e358db3b86fe4d07b1d54737b1. 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/ZABYX2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d4d68f89988d97246714067d7794890c7bb81d447ad5e78157c5f8a11b1e7. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZRP52276909.