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 0x6c049d3ffba00e54fa65168215b6e033dcae4163de09e3881db929eedb65c794. 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/ed018f34-99b2-4cce-b4e5-33668d2fb7f1.json and https://artists.proofprofile.net/proofs/artist/ed018f34-99b2-4cce-b4e5-33668d2fb7f1.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 0x077f0480b0a324b7ffd8c2c5db13ded2bac8bfd1c936f3d0296cd0d555e9d2f9. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/FRX762045717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98591f79fd5d235245208325d0629a686e785a59387a7fcaebc095361c647aa2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX762045721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2b836b0b800c2753ca3c52289082861a927ee99207c64b5c42ed411f45909. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FRX762045723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6085c34e6714673deeee582cb875ec9d6d0db88d1f2ab5a88bdbe69097482045. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/FRX762045702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190ce8d00aaaf190cdaf123bc9afe5eeb501cb0a99c33b3085cc383bdb2893a9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FRX762045778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec43bed2aa252372af4fe3b6359859cccd03047aa233fff1c87107833451925. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX762045538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64a38ac8e2d125f6abc9e83cfe47dc06e299cabab400d43687eef666b182208. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX762045483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c3692bcee7bf41c962e2a387b72d20caa743dee1da5e476dc5ef8d6d9fad6b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX762045490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c235fff370ff4091364ce100bb05b5a33034683095b31fc129053f2bfcbcdc9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRX762354563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c9e6644f432c30fd8561c1d7263c6f42949717e6eb342ac491344d155e1c9. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/DGA0H2319705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc2cccf8138d8ceed45837a443787ab39443d32f70afab43a123270ff8903ef. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/FR59R2473021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a96c7e120367f8ccd11195cd78ba091a2d2263dbaae963f544d1b670b975d2. 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/FRX452447953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c9e6644f432c30fd8561c1d7263c6f42949717e6eb342ac491344d155e1c9. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DGA0H2319705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d11cd928b06a32837db4c785ce07cef3e8b64203d923e5c7ba470aa022465eb. 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/DGA0S2484094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b67e3f9de092689dd180df7bc9b78742f7f8a32a91a0bcc005649a9910567b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX282573924.