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 0x45dfff5b6acbdcd26d32aaf5b6e970db0bf0aa42e1e5666c06647263c46888ac. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b46f6960-e5f6-4a5e-b13c-03b500f2c733.json and https://artists.proofprofile.net/proofs/artist/b46f6960-e5f6-4a5e-b13c-03b500f2c733.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Two Swords; The Legend Of Zelda Collection, Vol. 1
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 0x005b87d88532868bb1bcf95b069aa98afbaaba942aa7d750b767215278e0cfd6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:06:19Z), 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/USE830911534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e5a04ae178477aa74d4301a56cac8f44779957ade3dec66bab95e873d30876. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USE830911535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22268d4aef6de0e60ce0377547e623587d4b5854497efd08b91ce78859a734f9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:10Z), 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/USE830911536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272486d902e9819b05f7e998e11e669a3fd45225cc00d1512baf011d69b3abd5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USE830911539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848c377270761d9621ae2e71beb6be4d51aa7adfca5ddc090603ebee2ad36ee0. 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/USE830911541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3bda207cbf94eb6d280df081f101a2caa22390384f80f8d450c4db5cff44e. 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/USE830911542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496214e1c5f2d7db648e7a19c1fa1ad29ee08c5e914c6151fdc86b3e08ae67ef. 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/USE830911545.