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 0x496d2619fae3ff9781abb2c047d9d06085b33387d4afa125c3c2110e95462a18. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f006c5-10c4-4e89-b4a9-b6babd62a5e8.json and https://artists.proofprofile.net/proofs/artist/f0f006c5-10c4-4e89-b4a9-b6babd62a5e8.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 0xb49a8b8d3c515715c0a796eb5350583619d6f6f6865cf26ca738fb3e663b1ffb. 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/QZES82565834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d13744426765dd6e04ef9cd1507f1c9c846e7b10f1d08fb6e86648ec9248b37. 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/QZHN82585890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d8c930de23847e9993d33a063a8f3ecca035cec97cde665ec6b47a71d803c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN82589013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496dd93aa913b187ec29ed42f534bb5cc19438a41a6ee38d692b66f59fa3b1c0. 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/QZHNB2550642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5072dd9c407914195f0d8aef375ae97bfbb1252244401003ff06f75490e06644. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:19Z), 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/QZK6P2543193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fae64c3ccad89159680c55e7e29161b6b9ebd47b3dfc140dc52ed62382cc85. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:08:09Z), 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/QZK6N2526279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62dd046ba7f21b236e2e6ece5e6c4533131d31711394df626a112912bce611c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6N2561117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb974c828ce357e1eabfe3a5be7eb9e5e70440f45b74692987da21a281c2c470e. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZK6H2545918.