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 0xb33b25c9f352b15e501c095adab78d4b983635036e8cda15203b96afbfa0ad82. 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/774deb01-7cf7-42a4-bd72-2fc072bef182.json and https://artists.proofprofile.net/proofs/artist/774deb01-7cf7-42a4-bd72-2fc072bef182.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 0xc1e9d0a443f5c3c2bed8213fdc81d8cdd35509673266cf13d76d3cbc89a31202. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR96X2410159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9048487febdb8c718953e8022eb67b88b106a6cc6caf9b84b4276540f271ff67. 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/FR96X2410166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa081d43e9f83f28df561e5649356ad18c77673f31f8ccac4f5b70b607e45279c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FRX872430954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fd0e576149db3ca64b982d4971dce8bad58f35e3bc28576d2f25278c5da3f6. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/DGA0P2407296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e17a31c7375a83b9968a9c7ed1022e7f540698c26ed2aa499d48a39b2e5607. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0P2421488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1895268392b42e5c64bf74c7ca98008d77c09ea3addcca8ff174c3e778f4ada8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0Q2416373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84bdde0f917a96a8594dbff30f68c8afa87a43b7db44753855b02aff4f02a7. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/FR10S2561571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb5889ea814822d9fb0644b5230b7857477548f76788b7ce0fe659d140dd22. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/INM5B2512149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bd6f780f3caae28234ac85e44969494271a944a43ad7b16871b028e2f87213. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX282548359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7218ec94e39ba849b2a7006e5cc06197ea4a537a4d4cb4a0bc4563143b9fb162. 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/FRX452520069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133207ce50bddb756d3a5d81dd24b27e790f4f4561fa3342b7fe96804a1df0fd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FRX452572535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaacacd3b00df06f8ebd28f450b33c300ccc8c332a4ef0419c8bb95a189c290. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/FRX452585344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf860d2395db4a7a158b564ab0070a2eb09984223cff7f3414b0dc12ea6b622. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX762583247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe399dea932eafeef29296e3aec15c066bb26215bcc5b93e80c3700bdcfdc8ec1. 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/TCAJZ2563655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b167338510fa7f703a52ac34c6fc75614333bd3c4cf760a02acd6ed7ab4338. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DGA052505889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa442eb8aad18eb51d51d70c69efb1b928ecfb55b877089dfc08e995adb8a6b93. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DGA052500719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a079d5ea1669d546a75e9709d814eb73988d5bfd06ab10c75cd247e600112d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA052549166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f87d93920164fca804144be3eb063c10f991366d88cf758e5715a874a48ce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:07:59Z), 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/DGA052558335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca900e659704e42abc70c26cefbbef0d5e136dfafd36e8ff3e5474b03846754f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA052578792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1ea516edf0b8397182c0cbff154fd96995a669b4370e0c32086cbee508c77b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/INN2I2520242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87ffe89292a688501495e86a18c078a8f55806b23cee8019912631a1704d6e5. 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/FR10S2569848.