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 0x998a9166f6c0f7143d1379e228e9642edd5b7e5a09edcb01bf82f2dddc939044. 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/da4cadc9-f243-409e-aeb5-a0eec77927fa.json and https://artists.proofprofile.net/proofs/artist/da4cadc9-f243-409e-aeb5-a0eec77927fa.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 0x759629e34508e1882ffcfac4236e1f26721767c02bbbb74898b6385deecd100b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX202249369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64d87e427ac03806fa6d60a8bb301919e8c07a413fbe509737b8cfb2f69d89f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:21:29Z), 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/FRX202249377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3988af6645f9b23cb294f7bb1695a03712cae44a38a440e40ac7040a06134cbc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA072255133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c5d93734b7a9cd007a8d7f2dffa2471d5bd1f840b1ddb90659a37fb4e078b7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:32:14Z), 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/SMRUS0074626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e003614149ca351b2c354d83add2bac74ee9c081a9c8802201b58cef35f246c. 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/DGA0H2308665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aa2b8c5f14b2f747d35eda171d93376b4223727127c1d86486accd7ee8718c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DGA0H2308666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a4a16bffe806bbed2f9b66cd7a94bcfd25379fcff2ab078dfbafb2fb5996cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0H2308668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6525709cb114abb23ab10381e63f31b4a5912a6175cb4e9eb493846377e848. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DGA0S2477353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc4bfede63ca3830dc0321a420d9c2b73b69b8b1973eaf419f8e60b3ceb4eb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR10S2550342.