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 0x332dd6102552085102b907d8c3cd7088c5b50b84302c3757918d3f42b15af4e1. 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/04eb7461-f5cd-47fe-9af9-7832fc9df4f5.json and https://artists.proofprofile.net/proofs/artist/04eb7461-f5cd-47fe-9af9-7832fc9df4f5.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 0x5974d2609979adb3d9cc7faa40c576f85d06167a9089357c74f5ec7ae24e6505. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:51:53Z), 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/TCACE1550078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5765a97492632f21ed44739da07c79ac87291225b91c793d8d462e28d99ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM9AA1645322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da581a02f8f5869fb7fcc8d40237bd30fd282cf62d15c4fed7865426d51b4af. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAJH2553724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c25640ea8eeca3df9feed8e0ae03a9849e0de295b49b723fa5b56d0eb2768e. 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/TCAJJ2569267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa881ac374173704a677a6d9a50229039bef2e3f3e60a8e45da07ab804afeec4e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJL2558244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e00f51321e0e9aaf869e61c1a0731c01f8882887f9a7c5889dd7192d2c3f22. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJP2528364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcf33d8c8336655046ed64eff86462009d1b952a1d8026e86d9a7214d36c9e1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:15Z), 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/TCAJS2529900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6af3ca0ae0d63799a28c49f4a4168bd5f889150422723cc70acafb385751256. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAJT2509459.