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 0x5b4138d22c6d33f815047c2a3ab09f40844080cc8afb5065b03862ee5dfe1fdd. 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/687f5dcd-274a-4c9e-8517-86781188063e.json and https://artists.proofprofile.net/proofs/artist/687f5dcd-274a-4c9e-8517-86781188063e.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 0xd92db958e3336299676bb409ca5b54e532314eeca88cef094c6b0b9dc930847f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/CAWHO2014666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb8a2fc1cfffb77d842ac1b6af5b206f4b5cdc06208cddc3ef7920c0c976b7. 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/CAWHO2014667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a6fd93d7c9db2cfab7b4b997092d11a65298a23de9a409e6b0b418612693f4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/CAWHO2014668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069d58cb2b6859e333f3e8d614899e45e9c2fed69ecfaddd3cd43538f3a5892. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAWHO2014669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38400282153066c57307eb0e1dda4bb796dd7f2a3470d642f9b540bdb676e2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CAWHO2014670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933c52a80641a02f95c56adcf063abc3c7949d17cdb46ed13d069ed95cf4e92. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAWHO2014671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0542e67929812e82b72a15ad2e1c71a9cce54fb54f5c75d3cfba81e75e1c2a3a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAWHO2014672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29b44bc1f83a8803d3c5028dbe1e1a8d04f5b304d35a63a356e54d4883c7a01. 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/CAWHO2014673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a28db74f7ece386f6f0ea8177fd137b5574ec3fbcbd45ad0997f7ae33c1a6e8. 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/CAWHO2014674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b6aa9aded701aa05e17ae6014bfcc9a74759a0bab9e82a1673bf5fa1ca0631. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CAWHO2014675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3148171e9445f0e57ae6663510280a1887b9fe81e8aaa8a95a5a091ff78419d1. 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/CAWHO2014676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c5a156973d8b2160895f613aff625adda907cd628c75f56613cae43b24c7a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CAWHO2014677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6af8d01954055dbad273f4a962361d5640d0b734ce06dcba9e503770b8d812c. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/CAWHO2014678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d096aaf139ac767a37d40247d69e43b3e3f4358876df4544c720eaa1a42367. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAWHO2014679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681543687f00a0afadf3a7529d58a18f27dbbecce4ba51cfa87d1cfbe131fd0e. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/CAWHO2014680.