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 0x775fd9e0a8ea064e6c593d4623d844ccb004ceb9b8cedc97424dde353b06ab79. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa0a3d44-ac91-4201-837f-3d1cfecc2da8.json and https://artists.proofprofile.net/proofs/artist/fa0a3d44-ac91-4201-837f-3d1cfecc2da8.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 0x7412cbdc73acc0bf8d88f1981ac1b54022523b9a4bcc958868f1ba2372c149e0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:45Z), 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/QZWFV2424877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a6176d8065e326ee0581bae0ac764181e0f3d76cd5b86eb8dd1bb4c600a82. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFX2494438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f04b85de197dd7d75fe6862133ee1994da3b0deb01354644355118c4f03f1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ782415144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd792c2bbe3e2f894d83c25017ab709c9a49dc1b96c429ccf50f1c47254741e00. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7R2450507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eae5ef88af953978dcdd26080c6c778cb8e8a4dec81a02c039f4a055bc9325. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:29Z), 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/QZZ7K2494501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709bf49e93b9cd1f9e624a513ab98f890e435342c4f34ba40232ca75578123de. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:36:17Z), 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/QZZ7S2425443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4b5b626c3c61b5f0e41eb32096b52c6398e0d3b5d27a83da8f8fdb9c29d4d4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZES72574435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699b1442860b3255182de484e276608de2bc2702e4a58feebc697b9e530cab05. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:39:15Z), 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/QZWFH2596167.