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 0x3680c590ad6a8c060fd97874b686742b95cccd679cf97b6326e9a43d76a15f2b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/410100e7-10ed-4ce0-8c5e-42c7b5970b8d.json and https://artists.proofprofile.net/proofs/artist/410100e7-10ed-4ce0-8c5e-42c7b5970b8d.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 0xfaa31be85a1e0ed20cc77072b6b6e30ad822b9a5dbb9a4b51b953ef263a74015. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPX2389416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ba8d1880e495c0579bbff93cf6623721eff9cbae54121280d2defb8a639798. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPX2347757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127813d89f239bd61cb8cee66472db5aa8c24d74cd926ac4b79637bf93b8de13. 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/TCJPA2402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d9edb614c61ac566056037dd5f5830ec1687817758cb61adb9a1b081db6e5. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:50Z), 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/TCJPA2402651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aa674541c3fed2ed4483256fbff8fdf9abbc8a8959a0645bcb01896842e04e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCJPY2353577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a99404ad2d0552dede9f86e70255c9f9b76045513a1c428195035bad3b5424. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPB2416352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7830463509f0d690f89808a85c01f9770afcbc45470b013dabc77b44a8a3d0c7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCJPB2496640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bab9f5eab59364158c7b4025d63f7ecc55aff008a805abcdff5934db5d5eec. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPC2439200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95af5dc5abb083db9e071bbff8d882d9fab2c1d6e1b0f1da3d666d19ecfe4c1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPF2515497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ca1ccce012fc1516383dfd4ce241427a0f73ad262c14958373dbdaea9fa94a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT66J2501420.