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 0x224b1283d5d1ba5a6b7a9b2a3eddb1d7115746b695d8cbaf221dd7f894c66fd7. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e0df0d-d7ef-479a-a36e-8f2df404ec6d.json and https://artists.proofprofile.net/proofs/artist/67e0df0d-d7ef-479a-a36e-8f2df404ec6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Play Kat Onoma (feat. Julien Perraudeau)
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 0xd76f34d0cd0832bcab2958d4aee39c5598d6fbbb3ca11b8eaacc6436c9fb8492. 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/FRP101500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c5704ef78e4d0ad4e0f5c73f0e01519b935b3806d0782f0e61d87b4b761d1a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRP101500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b73469839ef3058994ce0d5ae74c62b5bd4b4f7cff4ee1c1774ac2803f8811b. 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/FRP101500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3f0617d4320e94eec1045dd920029e11efcf4bd9501c3422c364e9e06038ef. 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/FRP101500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541442c437e9c11c0f7b41fa9a5afbcb0b26ad614b882b7e9a651ce7a7011635. 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/FRP101500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ca16360888234e7fa2164c4c13f9b54a08eb4cb7ba35ab6e4fc1a687d67b9. 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/FRP101500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662c23368fd86450b07088cae09ea2b519e00bbafca4f7c0453b52feccec76c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRP101500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2767af9aa12ccd8e88914fdf0cffdcebf28cbcbd1a3f5bcaf8b407d24215d8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRP101500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bed631c617f7b2dc2bf0652e419693d4ba75c373497d4ece560f6a6db55afe. 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/FRP101500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038e1bc070c561052ba8f686257540884693ef9ac916b6e6c374e983fda5035f. 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/FRP102000150.