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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2909315219fc950cbe66fa1e02f2e8dcb3cc6656f2b4a107306c631015279dbd. 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/ffb8c332-cb08-4c81-a119-22dcd2eda5ef.json and https://artists.proofprofile.net/proofs/artist/ffb8c332-cb08-4c81-a119-22dcd2eda5ef.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71488957920d4f018898c4de26896406bf53f90b27454db4819aa68eb314349. 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/FR96X2472051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b15d1c319c2e62fac70d491b2ee5c42e47b2bc93f8c366589d09ced9425d1a7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR96X2472222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ab4adf3e0aa577132808cd95b083ecdb21b75e0e1ba9a9b2962fe7db5e5d6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:59:44Z), 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/FRX202412896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe72163ac59c131d27d79c8ee0e1011b76587f22eae65bf6eface5095c656bdc. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZHN92104371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1440ee08eb7f5417b7734f80969ee79a8c754f06643770c5aa3b45e4c92e44f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR59R2417580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8436b00af99d0046e81c096c6ec488b34ad8a1ea2907aa4d307e704434703f2. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/FR96X2438109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fca16dab52678f17ec8d434dc83ec96e1d0d986e0d1e631862cc45fcf2465c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR96X2449670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f364398c50c7c920e491b836b118ec495fe28d8623ff7bfa27e2aaa03aafe6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR2X42452643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9412d2210ada8a0ec6a4846d93203aaa8c1ea8613d4889f6cf17db09707795. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR59R2453741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439da664bbcff573265d3b7d78b5c511df4c571eabe03f4b604e3091d353b2b0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA0P2352827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5820ec43658392c416d351d9c428a449cc1ee92020f53853a0f28cb25f70184a. 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/FRX762457572.