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 0x393b53258a4293e0746347fac2dd574b099fa02fde6aaa379e968cd1cb7fa79f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9a50a59-a013-43c0-b9b0-54ccfcedb109.json and https://artists.proofprofile.net/proofs/artist/f9a50a59-a013-43c0-b9b0-54ccfcedb109.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xdb0e7edf7a8487a735e8eb9db96771328245d7d8b6adfca3d078c971383ac75d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIPT61300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7352fbe1272405ba688a65869d4dd7675310de910838518d526a6b8f03615e10. 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/FIPT61300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d29de8b8e7fa127c944df9f4f66e6f907e79ed5e0ed8ccab0f468902d9974f. 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/FIBBA9400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8e92787af3a5661153bf58fe978f91e052868bbd96143755fd65aa950143e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIPT61200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf17ab26fe199b4a3cfe545a9c6f9d28eca034047ae93e3a1b9ce7ade0e28814. 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/FIPT61200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598d5e2611765bcd4615e2197a5934d7050ca216e82fc555101faae728ec341e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIPT61200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c09c32d63af775ad71ff910f73b78e2a71f14a75994b38cbe2c743961dfd8. 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/FIPT61200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b3efb62626fe3ae0dd7e7fa8bf04c5974836f25937267eaf0b0bef8ed6f7a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:09Z), 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/FIPT61200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2192d4170952e4d23db221d255c2c647a47d9d29a5f2f067cd7485a5f016cb8. 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/FIPT61200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee12b49555fdc2a463f32190ee4dfdf8d96afb3a009ccec32c84efc61475170. 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/FIPT61200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f5b0e21efb55878883571107efaa9c3cec48c3b3b8567d38272deca64aade3. 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/FIPT61200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36493139ea0aa0400fcd1c2bd3485fd3db0a81617a2d390d863f7c8efc5100a7. 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/FIPT61200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ab1482a8781ec7a57bf5e1268f569666bab527cb2ee00ceb3c8226b2930e04. 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/SEYOK2036657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdee0abea3eecf772fa2ca5e0e2000e05f828142541cc8e16bf9b0445c781d7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEYOK1844154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3212fb9f2dd815064e0229d5bede627d1e3b513019ba0d026e21c5d8a44bd. 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/SEYOK1809250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33b40b6c75a48a557b514f4b152500f02397f23b8632b6eb677c1843e10348. 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/SEYOK1759261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045709e1cc47f9debbff9f0f56824ce23488da314b3da0e400b7f961d8027d7. 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/SEYOK1752196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284d9ad97d85dca03c4d984f5d7bd955c114cd280dc90067adaeffd8527bd243. 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/TCABM1352612.