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 0x964c371ad91aa0428d61e819d591f4a470a45f5fd2096ca6200cb3918d0e0134. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a89a8d8-e562-4729-a539-45cc1eacea5b.json and https://artists.proofprofile.net/proofs/artist/4a89a8d8-e562-4729-a539-45cc1eacea5b.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 0x98420b9ae794c32ac5ff1fc24c0c954a4184db1624e49c9e6e28593bd1490ca8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZN882134282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef5690c6e0140bec2a1e9103adc899b49bbb35080d0fd60929e4b6e27b7c12a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZN882136441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac9e875a890dc9c96963b4193c1ca9cccef6b39c3956850cddab5e2f1878fe3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZN882136442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde523c779d3f9d8b4b82cc294ba485a1d8d3968c0199ffdd0b74f2b851fe77ae. 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/QZN882136443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856a7fdc79d385cc80250b2c69e0977f2b96233ce9f310434a24eebd38e28e0d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZN882136446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf205a5afd6e8421fdca2dfa7d72dd827c52d3ebd77acbef7d162865bf9541e58. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:51:11Z), 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/QZN882137776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a860a5fb1b54ecca8a3736425b5ce4d8eb87a5289d81d7b3323f319e68e3833. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZN882137777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d7a2132663db418e7eae808ceb33286fe7a0bae4a8790fd945f4c617b2adba. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZN882137778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509de9e1968dc7e2e04fb288d8664afb33cc92518c9f4b51549a5ee044f02062. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZN882137779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2642ce492dd207d72def6e41b145128b545e51d6892dc6839078d2808615d904. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZN882137781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa90918269665d0a59f80fdc299902b6e8bf2aeb0ba53936d3557fbc417a48f0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA72269098.