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 0x60a3b16eb2280622f6af4f219561950280e5109d08650c47dcadc8d91d476118. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d52de048-0b70-4738-9a54-43dfb8a49434.json and https://artists.proofprofile.net/proofs/artist/d52de048-0b70-4738-9a54-43dfb8a49434.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 0x19f3f056fbd0d92d872a8565ee9bf4226ac6c57b624eb86a6552277963751101. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/JPV501800435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826cdeccc6b8f8a5dbe9e5ce6bea78d07f7212faed4316e0a9458e396e0a617e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPV501800439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ea56ca94c0743e6dbf0a9f690918fffe7ad1aebce72d0f58bc93c92bb12f81. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T16:31:42Z), 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/JPV501800440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc2369ef6cf9a182e5df18c2b13c923400c2faadac3e71d70a1898bb4767701. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPV501800441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad09ce79bfbfe2e2aad8261748c780350dbf5a2ba5d1f2a8701052b8e5c877b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPV501800442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ea7782569213e76b4dc5d9d6d6fec5b123ff551860cde55f4bbd57c5ff7a37. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:07Z), 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/JPV501800437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671557a27d5a3c99682eaf60d1f955428ac33f8a01f82746ef3a86f8c99c04d9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPV501800436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002b4a906c0be8ec99360e9170f464beed24de32c736194ff6668abb58725dff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPV501800438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065bd3fd4e94903de27cbce3231fe8ba6a3073e303f88bf2517d900d38312c4a. 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/QZHN32016871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b3318da1f1d11592c45f2bf6592e0a337834436bc10fc3ab0ca0b6ff967c1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWY2065672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a3bcab5a2d064b7b455d35b29b31c02ea71719872c44bd8fcabdaf8b5d0380. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZNWY2065669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45473377fe0205a4abfb4faba8b3517ccce44db1e6834e089d5655ce807cebe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWY2065674.