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 0x5affba5b193eb137349d5ef9ea166494d81876a7a22b9d375aa11d94e7df948f. 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/ab382990-998d-4765-ae75-e15915b0e79f.json and https://artists.proofprofile.net/proofs/artist/ab382990-998d-4765-ae75-e15915b0e79f.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 0x6776972d9c3106bbd005c0f42580c91fe6f1fe272b83c7cc7d068f790c96468d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USA2P0782285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f5052c7eac1b701db202cd4e73ae71aa3ec49aa5858703dd75d6b95cdd8576. 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/GBFBC1000583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa33f8b2f56ffd516e307dbe37332f9702a9ae6cf32a31c7407f69dada12a32. 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/GBFBC1000582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed04441bdfeff76635e544ae66f685c6ada7946cca4860380d4f793cea0585b. 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/GBFBC1300981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5256847f9227a21529c078e9832a866e11dbfccfcac2ab58408ef9aa8b0036b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBFBC1300987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea1116e87600b23c06abe6a6102041c75f7c107aeff029117883d95b574c7df. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBFBC1601373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc335a2376d03ec2f7f57212b0a21eeb61582f972642ece0b8c36d154d3522534. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBFBC1601376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c881d6c594870bb81f67de4eacd30e792fdc3d102d5c771664d2efb926f9a87. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBFBC1901839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99055cb0ddaf4b9b0c176c01ef4bc909f25b7ec6a6d45f66d92785a92d51be45. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBFBC1801735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cc4edeb6213201e5daed7b34c02d2e86174f9a146392872c700e7082ef5ad0. 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/GBFBC1801724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ee8277ce931c60ed9873779e2f9d152ef702d40a2f8061a8ba8b5c523e3579. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBFBC1901840.
Funk n' Beats, Vol. 4 (Mixed by Fort Knox Five)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9d6b5c2595a2cc8b564f996b77928ec076f35fc2ac0e5ae448970eb7abef4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBFBC1601374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c7e8799d6727ba808d95d6a2961b33a243c1b571ec7660fbd72b152de2bac9. 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/USA2P1512819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5891475aaecdd1b7d75ad351910d3e39cec6bc606a3620ba376748e25b675c4f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBFBC1901788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a7db069665607f520b2350946975de2b6f8f0db65a9d67875a0639672ce903. 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/DEW871608710.