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 0x1658c621ef941a9f7162c3631be0bb3fb297f9c4d66fdee44a03fcc7a06e7f9a. 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/63266dad-2426-40cd-9936-cfe0727edd56.json and https://artists.proofprofile.net/proofs/artist/63266dad-2426-40cd-9936-cfe0727edd56.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 0x9a5663b7a6f78041df6111ee30a20e98201f4de0bc14536eaf37239a6c8948b3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NL9KR2311719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15154bfa0233e979d1a48e1ee1ec4b5dec521fd9dfb0e5bae1c4b2aea883c09. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL9KR2312143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e5a7c94f78b39f9622172a2b9f6d061c00c50d48e5e2cb0e0bafd31e26e14. 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/NL9KR2312082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbace6ad3dced54f988c8d892a20e2cef4909dbb5617a904279b1ae42ca8e0b92. 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/NL9KR2323825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf90e9f390befbbbf6876416963ec35cb89d17068224c14d5002ea789fcf5ff2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NL9KR2323938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5eb2cc21f33f09b351bb0903b23bbefd1c19bc1046070fa51a70421040aad. 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/NL9KR2324082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82a4f0caa2631a1dba4de74fc1649b76a55dbf22dca7436c39dc34768f3cd5. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTBA2361895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deab0d88b9f70bcf9ce2017eea889751943cc30dae35e2c3c5611d2e1b9fb1c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NL9KR2324788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ced9644643c7c0082b4bd0d8502cec7b65e22d5e47693d0625c6b3dacc7889. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL9KR2325967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa412daebe89612bc493087b9d9e4e62cfee6631a2cdf9338b720d956d9efb8. 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/NL9KR2438504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c1ddef668fca2958c712fae1484c113242a731f88a72556dade0d6ae8a53a5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA0Q2418011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9a00e78715e9d3eb3ad3fa5bc5b4e6d6b5ed7313af0a03c490944d757571ed. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/AEA0Q2452608.
Agree to Disagree (Got Nothing On Me OG)