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 0x84513751a47b6fa79b7ab2dd8d494f5089d76f98e8c88ba087f0c86c71d0c8f7. 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/631cbb05-18e1-4c68-99a3-b4a77753fbf4.json and https://artists.proofprofile.net/proofs/artist/631cbb05-18e1-4c68-99a3-b4a77753fbf4.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 0xebd6de7f1796b4d279ed67afc3519333ccd480a38809f0e5d401fb78a2d0d6cf. 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/QZES51819366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa444fe95faa1499544423725f92a8a4e9048bd0577c8d933649af3b127a861f5. 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/QZES51819368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a38e842e308c1930b8c313c6ae81e93351e4a50b6ccbd58c38da31ed5a4a13. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES51819369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed7d6c7006eaffceb6b839217bf472afb8e2a523aa1984bfaebc8eeec44038. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES51819370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae37508b1e9a7c4f0797f2c0479056cac1ea8a9e434ab19d750762a098fa2c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:59:17Z), 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/QZES51819372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15168032bfa4f7303e92eac154ff12c7a5f0b671d18cb72aa1aa79e620fb6165. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZES51819373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f1e89ac85cbb42ebd9b2641b68efb4764c6d5624a07c8db635376cf2805297. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU7520063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a66acda27c3cebd4a044fbd19a1c701d458b3e582b6c82df64b4c02baac1e0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/GBSMU7520065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea24568a0aa3ecb9a000aac028e236339ee9db6557b185429ee122f2bf83c3. 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/QZFYY2395492.