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 0x7e42ee49987f590157ce2b3b7710d269a39e68186d632766752d0a0a67ca1c41. 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/149e3a24-27da-4a3b-905a-0b19ebcabea5.json and https://artists.proofprofile.net/proofs/artist/149e3a24-27da-4a3b-905a-0b19ebcabea5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Four Seasons: Spring - Wake Up With Vivaldi
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 0x38a575fb356a2f1757af9bcb8e05984fd1e6fea12cf0f6086c60c70553390f22. 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/ITAD81000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afcb02310f67825a308c1b314153d2c23d544e77881fba9e640319401d567f0. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ITAD81000499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8100f0ca8861b8cf60ad1c140c6d831b3272201d54ca62d9a267169bb8b090a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:14:39Z), 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/ITAD81000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c07796bb33742a9b24096e6460419f3ce9ecba467b8b50b8540d3963d9feca. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:17Z), 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/ITAD81000504.
Rocky: Gonna Fly Now - Champions Wake Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe160700f58b2611435367a35dccf7f855d8e4c06d143a5340c7478675926b53a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-23T23:48:26Z), 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/ITAD81000505.
Peer Gynt: Morning - Pure Classical Wake Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e4b972a2ef7734efba97ddca54a8c9e4f3b9d32e16c50477087cef8762d33. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:45:55Z), 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/ITAD81000507.
The Good, the Bad and the Ugly - Western Wake Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee7474fd5e14ce4d32e19bc9a87198493f975a6ae2c8e34cf3c3303046df27. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITAD81000509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478d8938dc25b4e7f3d06c780f3e9075a77b467257bf42daf931c757eb5260be. 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/ITAD81000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf805cf6ad3f81a14cf04b28491c64c93be6a1c9c1b60ef467442e19d7f36730e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ITAD81000530.