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 0x86568eb1708ae957e9d9c25ca401755cdfb5454364d01330a2c4332efa7bf1f0. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/330b7db0-b5c3-4cb4-b460-cacf56d01134.json and https://artists.proofprofile.net/proofs/artist/330b7db0-b5c3-4cb4-b460-cacf56d01134.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 0xc6b620a2f602fa71405660f1c568166c56e193224d963de58180185b026e96ca. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DELJ82009613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2694a490457794c97c013b6f6adbde6fb716b39f3656e846920135db0cbcbe. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DELJ82009614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae9e30374314ca5d72601232a6136e5ca6f4ab0febf1022157ac349bc2bc28. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:39Z), 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/DELJ82009615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10117109c7b92176e8d0ec7b97b7970bb14790dda2c3725546df27c08916a3ec. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DELJ82009616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca73bd92a68f594d6103f965d1e98f2fade97efc238b6a2dbf5ffdbe8505346. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DELJ82009617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084d899739f493af131e0a5b264c705a1171a2ee0ac4bda59ed9abef3071e1c6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:20Z), 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/DELJ82009618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a28a4f7c6b923c2a6f0286b74f715fbdaa6ce8e6a200d2136696a64a711355a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:23Z), 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/DELJ82009619.