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 0x5ad60e64e4ff1dbb7ec0ef733c637753ce511338cf4ab5ee7062631b6b515e01. 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/268b8748-3caf-4bec-8d08-36512423bf06.json and https://artists.proofprofile.net/proofs/artist/268b8748-3caf-4bec-8d08-36512423bf06.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 0x4a045affddfde539ced21adec69b8db01ff5359d2b619f393eba105444abd3e0. 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/QZMHM2322321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5cae000baf39c8f1ca596d106eedf03a009b35fcf1e67014ea44cde952dd6d. 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/QZMHK2318195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a332b00912ae11fbce601491e427f3ceec7824b1ef0751eb6bf87f8d02ea091. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZMHM2356593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ef21ecc8c0aa58d1fb6fe42196c73a404e1fa4f0176b1c0b35df0d899e7de. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMHN2346797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b96123d6d7cbd070e38675265d7583d6fcfe3a1a1b169f1d600cc7cbea62fbf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:35:40Z), 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/QZWV32389280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134e20fb38e8c09a810f8ddba4877f818d085a91dbedf28ee603aa6a5c1c0a66. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWV32389293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a34ce2d268495e2477403501b9ee2831285dbcd49afb84dc9932ff5e55722. 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/QZWV32389462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43248cd72a5c1782cc07154e3df04382fae3887b2c323b511d819d2a30da60a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:23:08Z), 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/QZWV32389477.