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 0x2d8d7a02e6be03a46a62fa25cbf18bb9684d6c052b42a003fafdc7d35a66bb9a. 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/6c9d6250-e02a-403f-bfdb-8ca10fd5269f.json and https://artists.proofprofile.net/proofs/artist/6c9d6250-e02a-403f-bfdb-8ca10fd5269f.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 0xa574293839e59af89ef756cc7d902416094de1fa4d3e77e805a0399d05f4c6c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ61916094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ee20c6865f5e5451538c30427e84c74866c247d3924760e7486e43f146404e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ61916095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f50643c3a9da520b86528cddd6260575bb553c939507cacdac3e6a5f84539d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ61916096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eaf1c46a54a0143be14c7f4240928606aee08bfaff36f445ec6983138024f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ61916097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9857c3c56388dd7e1a3a19f08d9f853e2ea0514e88adddec89c1c31a44288fa6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ61916098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258385dfd1637877eead7c299e0de376051ddb2bfeef177803fafe03d2ea7552. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ61916099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9125cc8de9b7930c84564ee3744bd07ba96b0737c10b826aa9ca41e1491ce694. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ61916101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef032b8ea52419fcdedc3393ad648e60b01a6f7933de540085a048fc8f230097. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ61916102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de2df3f0eeaa9140b0f8c49d70c47d9f0d6f4ed77e2ef075759d98e0129824. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGQ2248253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da3761a166508e38a2ea4072be7f73482c304948efdedbcbfb5517b692a47da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGQ2248256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81500619920b8c04ab61ad16675df52ea2d1d608178a8eef4486e9a3393d249b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1111232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673b965c2220fd5c195930a555a1efb9906f40218c0893c70c69b0a5c05810cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ28R1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb145744bd0a8c4451ccbdadbe55321293622cf2b67386cc8fcf259180d0c6b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDED1800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d39c109b3ae1eac9e589837e2fec5b8297237b62d6c3574a3019c13185c5117. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL1819506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce743ee149b0c19efe0dcf7db7d1e33fccee0a60787a7c86053736273a07ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMEU31911717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464832a41531580859a54b63dde5fc228e385f134326b1d32a46741319c57f47. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDAA1800004.
Dirty South Compilation: The Hostile Takeover Mixxtape (Mixtape)