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 0xf21312120d51690cfea27284e2cc53699505353643b2f1634ece51f15fde4f57. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb658c28-cec7-4771-806e-71870aa6a1a0.json and https://artists.proofprofile.net/proofs/artist/bb658c28-cec7-4771-806e-71870aa6a1a0.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 0x572c5f9754290cd4a657ec55e08cafcb4fde80b7c06ce440ee45cee3551e96b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6N2091928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e2ec9349539d3f0e8a3c49706bd0597be198b687b43baaa566ddda02dbdcf6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QT3EY2448260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6f5efcf712ad0a5a286dd550c049b15d8857876a4bb3dcec14be82ebacbd7. 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/QZDA82546023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30cf7dc0da48f4b6f6e5bc371d3842cb1dfb0bfa2ec6b4c988ecd4fb6c7c36b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES72538058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fd70efff60762e3f306aece47acdfe9a89e36ade80c42339d25246e2c0b23d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:24Z), 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/QZHN72568470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a4a02b0ce6f0914c8771a89f2f0eea13a91659db423664d3018502347c005. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:29Z), 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/QZHNB2527224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b123da58732005ae88ca5543063f3a4e723d2dc2943593459cb7e6968370f5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZMER2500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d39bd2a61e62d09bc4999ba724c6cd4c3b7598e57204fbb389d8fb08cec4078. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWY2566233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f91a08fb1db9f22a8aa8543718f2a225509ba674ad9af6b3bbf312837cd8ad. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTBB2527629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080d5da906207b78c9ee7fd8dff3100472b52bf7fd9ea7478bfd5efccc2e1960. 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/QZZ7X2534241.