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 0x0736f4cb334f5179344185512b1c555a80bf7e835ce5eca9eb5ec75b9f464d49. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd5f589c-71d1-49a7-a27a-64506505522b.json and https://artists.proofprofile.net/proofs/artist/fd5f589c-71d1-49a7-a27a-64506505522b.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 0x775399348b4a93b3638ffb0c813b8b58766f079c53a714101683abd2900ad1ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN92532445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217a827f1d92e72889f51133ab6589c52c04b14ad176dfafbdfc1e77984faec. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN92532446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de26e787ce0d664e8e5ba8e9fb29ab081cd8cbfb76af8d3d60365883f577ec. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHN92532447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5f24241360b05e08c9ce382d28a9bf242c543ad06c25d0dddfcde79c77e16. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92532448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c63c5e8bf2202e0b8adcad9f586774ac6639f14f1436a0b686d5923a9e706e4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN92532449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb8f6b521def591d003bbc44346191bccfdcb30da0b7fb2ca2a5bac07fc7eb6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92532450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a28e84e010cdb92afe4a9a9cafacf9801e7f770d63e683dc7ceb842453b9de. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:58:00Z), 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/QZHN92532451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca3c24f917592c7ad6a7186e38f31ccf800ccae50b6f2e2f53f986b749db623. 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/QZHN92532452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e9bc2aec7d09b148a6e5f39e780f7181e764333c77ed18725da487eb66ee8a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92532453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d918c48b7c9009e390a82d32b3e0336ea85c6f10e7ce5442c305a7af0e4f35. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN92532454.