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 0xb3746dcc08224491803e7a3a4aac91e9ff8cd29df9dbac368f4a2415e2e2ac42. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6a1d79f-0ee4-471e-b205-e9e6b315d10d.json and https://artists.proofprofile.net/proofs/artist/f6a1d79f-0ee4-471e-b205-e9e6b315d10d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x7bb889791a24dff76e8fe6559f9751903a2971db74a8ebaab8cc164638f4d4db. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:51:46Z), 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/QMGR32097690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a1cf4240b9d29a202a297aeacb9fd981c5460aa2c8907e9b4cacbe8fed97c7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:26Z), 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/QZSYP2146692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda95423f662ed705463d69144bfa3bfa4ce3a9f955bc48d1d4604043af6ee7e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PEBQ91606948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106bd286cdf830ddd17701d1d2d7aaa4080986cb3d2a30934ba9a9cc76f62eef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PEBQ91502189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda95423f662ed705463d69144bfa3bfa4ce3a9f955bc48d1d4604043af6ee7e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:47:39Z), 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/PEBQ91606948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02afed4d6a773abd14c285c61021fc1872001613cd4f369b0a8122658201e1a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ART0G1804756.