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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7b7b2d1500c51fe9ee25a9136a4783da6a4ae16f3a51d781f219ebcf2dc7d7. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dd805c0-e450-48ae-912d-b2d936ac8822.json and https://artists.proofprofile.net/proofs/artist/2dd805c0-e450-48ae-912d-b2d936ac8822.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c203313b89abe94d003587bc1d3b269e5194d83241e255c3e7d1909f62863b9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPPO02103657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799d6da57813a9fff45dda6fbd3c20c12f9b86080eaba3393668d999fee427a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPPO02103659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e5d661c4663cb859d66f4bdd14900221df7f2f6b0b8d14c274112d9b273c0c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPPO02103662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d9ec05226d29cba2b8aaa33536a44f7185078d24d4b4bf09a1c0c6941d511a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPPO02103663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7166ba554ce65f4f915cf54e38b5fb3faa0a69ce391b1ab54a6924a620741c89. 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/JPE871802917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0264d048e3014b038456ffd1ed94a199a6316b580c489e380124bd8808cd82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf0ff3647d21264d24856d98a53a2faf8dab4dc4ef9109fd32e6689ca0fc929. 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/JPJ902305550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4b915ab8f2abba967653aeb27c6259a4524d7b155c634f632f7191447ebbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d899a4bb4e035bc3e713e85e2e19cd71336f9c05d0b4cc716420a473908bc7c. 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/JPJ902305570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd8c04139d4fba125b311c66377638a34924ae00322fd599ed145cec6237e41. 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/JP92L2301590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e25348e7f4725581ac47543c41ae2f41e396b29a926234a8f899c6eb7e0ea43. 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/JPJ902305580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ca4f5d5aaab824e9d4d53d73b479f44e1c0b81627f087b4317be94af4eab12. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc994b331f89b2796ccb2ff95f86d251508942572b6588cb714739194f12adf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d513aa2dc27c284cd37f46f3e0b5eeef30f6e342756c3dd10325ce56efd014. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b7062f2b3e36cbcec00b82ce0b6c03a8c4b93d26b7a594b53ec1fc6d912a28. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPJ902305620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6052973812dade22214996ba4e8e618a6b4fa204c220f63c7e89166731fd3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cb5dbb4662fd81a21411fc4c0e1362214dc52155fe3196ad1c86df69107f71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ902305640.