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 0x87af8cadf27bd4be118121de17e067647d0620b42efbdc082e46e42d358540d0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c509b6a-9414-4ae6-85e8-5390de3e3b5c.json and https://artists.proofprofile.net/proofs/artist/8c509b6a-9414-4ae6-85e8-5390de3e3b5c.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 0x40f8dc754bb4f7d4298fd5eac25c135ab3df36b321f2c0751d2e2544c576a7e7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2239363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eec56b07c38cee720e170057ea5a9e07de6ee5f2c4dda771029ae6ffd5e27c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNJX2239367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ada435b7bc344df0cd6f383b8ef0d676782128362a79cd3129b08c7020b206. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJX2239368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d45e576c1ea56f81be370f5bb47d8f6a466fac11b861c45e322ca26ac93033a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:19Z), 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/QZNJX2239371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcd4254d9bb1006e423a154dd207617173f5cb7f6ce635d0c0b97c1f576709a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:56:50Z), 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/QZNJX2239372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff71588ad7936949c00e35462352e8c492f5fd11060dcdad3f727100b8d434b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJX2239373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7f2fb59e31f42b2d6cf2849622c3ea8ebe08dccde14a3b68e84c4bfe591e6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNJX2239374.