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 0xc304a741f3cd5a49138ef5383e2025c0a8be85e85d7c32cc543b8d282e3943e7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00984af5-1e4e-42e5-9b3a-7105e7c5f1ed.json and https://artists.proofprofile.net/proofs/artist/00984af5-1e4e-42e5-9b3a-7105e7c5f1ed.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 0xc1e109815afaf1d3cf32ea4b9862fbfc93e64f99f419aac2f918a4df3bd97893. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCABU1464481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bcd24ef5f50b235d7fc9c30e7235722d55a0cdb2394df12249c4f5661f591a. 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/US39K1626305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7182ee45779094891f45cbb0bd527b0bc0c072ec7f3097845532e0a51a41f4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US39K0919208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afbdee751e0fdd9f62f8cf57bd0d9ff7dc740745f831731122e94fab149be97. 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/US39K0760201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf0d091fb19f7a475f5c7136440d1f90cb95b3f971bc54551ab83e3f26a560. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US39K0760202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9ef9f2876ef9ed2e7fdbc324d12de883c1ea5abda80d3756f468072fa26996. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:12:12Z), 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/US39K0760205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8475ddbf334eeeacfc13bde514ffd43bf7aeac35141c76f9048279b1be18d9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCACK1506508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3673ddab2f9a82951aec09a1c713a247b45caefa3436bc82b35508aa4250d83. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USJ3V1436611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fc0ddafc1115b910944ee73c4b28e6c728bcc6143c4489f03f79f483878bcf. 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/TCAGG2218879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dff129a7960018903554357a2fa0f513d040ba67e0d387ec91deae9aac1e49c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:50Z), 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/TCAIO2430592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecd868a51d3ac1230e2db6479ccba706efd7c447c9aae69f8f00b54843c2dfc. 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/TCAJR2542676.