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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c8451bad8692f600a6d3998a2b66e7ecac1f0ff75a80eae5fa9fa4c93d2b9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a0bda1a-193a-4e2d-8770-8a2387d8d3b9.json and https://artists.proofprofile.net/proofs/artist/7a0bda1a-193a-4e2d-8770-8a2387d8d3b9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830277fbbfefae5b33ea32270edd8c6a4e0ac45f9295f6f794a75bb27ef40477. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWX2012077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfb11019050b66634ff04cc8a13d1756606394b1f90d37bcc4d2a604703401e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWX2012078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41929eb98e067b76fa27a58dfe494bbb61ff8ed1ca79280867637de0d941f38d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWX2012079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fdb9a4275880f40d59ed087069de2cd2594771efd6935e6d19694f689370fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWX2012080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e434450a3a5aeda0f620ea4dd84e060be74114bb8b6be760c5f593cca6bebf9. 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/QZNWX2012083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cef33dc5ff90730247fd479b9af7a4b6d02704177c6fa184246c8c1a56cf8f. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNWX2012084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c12827ed8b3df22e0d865da9800904bae507801fe54b079e6fb7be049e98cc5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWX2012087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d19025416a5c41c7373ea13cd142e20e3bdd2603b97d6bc5f91879b35739966. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWX2012088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a3182811c7fe7cfdaa20363dcfdfb0512db1f92d0c4fa2eca8fe953a613cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWR2178786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe14b8a3310c09c75eeaa56b647875630350edcd2ef08944a04b11938f39a5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZRP52424690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f7ef9929722bd09e5474bc222fef0c60b322ff93cbc34785a4fb568f82fd7b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZRP52424691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621d2f36fbb5a6a06332544070037e1155de3a3c407ca7b3dd22c365579a4fb2. 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/QZRP52424692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58108c87cf7d112b8450b4b60121c6c875fb1039916d29b88fc28161344dfa30. 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/QZRP52424693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a931375546e56358f5dd50461ad66f27b60dd89e06bc09bd79311cbe4784810. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZRP52424695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5b228d717ec2ca89d5f4be243d5539a5e0afccfb2d2ffdfa6428bffde2ea8. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZRP52424696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5fe4880d9bcc8a479f15579923d03620f3910ab394f7f52c6238cf31cd5687. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZRP52424699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e9598425fb29eacb5e414e8122dc4f10154234dbf6e675d5eca3c6dd58e8ef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP52424700.