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 0xb7057c8d2b9d02c674e514dd81b5f2879fd89dbe54dd23c9a8c9e77200cdb514. 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/fd51645c-3be4-4500-9797-84226eee05a9.json and https://artists.proofprofile.net/proofs/artist/fd51645c-3be4-4500-9797-84226eee05a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blue Is Just a Colour (In Session at Solas Sounds)
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 0x27af6860dcf04c9634f4c15d477862182fc8fbcbcd2a1d72cfd6311875f58ec2. 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/UK93X2100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0004bdb06863799da988b6ba1234fd5dd92b86e612284e875527cf08daeddac. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UK93X2100312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d1c944a47ce635728b6e58708543c52a7cb186bdd0fa692b471fd45af4599. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:55Z), 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/ZZOPM2106101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680ba5f7de23977dec64da5cea47f120066413dc4cfbf11b5f6a049f7a9e242. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GX3Q92329491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d008d5f2152488ea4732adb6166837a73544c868f1b582a7cd548dba35ac62c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GX3Q92330234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b19d38c69364d7215c21bcdbc96fa1eda71783d9d6e324d1443c447b7639465. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DGA0S2494334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1448586ad7de3e6a01f5c21f27048a73c2d65d86df1b6c7ac76fb42d0572037. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA0Q2426238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9cbe80fb0146b1153647c2afcc21f2eb26c2918b8a846064a20acce1f4643b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBMA22471652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb0292bfdee55e94471dae26ff72d448ce7dc767eeb30191754c89e3a4b60c1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA0S2453495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b87114f51fe4009aeed6fa91a17e919ec8e5e3651cc3296eead918fb6a49721. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:00:48Z), 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/DGA0S2459598.