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 0x8f52228ffa7cad666de5899796a29e39903dff6f020cc17d6a80f5cb04b1784d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6415c3c1-e4c0-447d-9208-4a05a6d22c42.json and https://artists.proofprofile.net/proofs/artist/6415c3c1-e4c0-447d-9208-4a05a6d22c42.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 0x16d16a88009bbc550098c99f9b09a751838a721baa138f09e10e117b68b2c4e5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX201732584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87030dd7cac14fb22f5e8f8906e9aa9f12dc19aa017fcd5499b6e880d96eb945. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:39:42Z), 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/FRX201732585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b601a64ae63624907cdb799edf8b7bdace887a765e943796ef442abfc0b9bbc. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/FRX201732586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58502d8663b2880ce01a39d51a102b1b751cdbed4b5fd90e5f5bcaa99032c82b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX201732587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178cd5d4db5c637b80911d602599385f81619edd23cd78f63087ee610de45d59. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:48Z), 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/FRX201732589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d05558dd899e216179fec77e606c944fbc720eebd9f95c4b3e0e42bd456731. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FRX201732590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eecb953d99f7022579b6910fa7299e282c2682e4fdf1731c6fd99477c65baca. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:58:42Z), 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/AUBEC2444702.