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 0x766dde9cc6c12030c71be7879191f9a89eb5a1bf790de54e0867dd93b2d7babc. 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/802fd6f8-ba38-470d-9e7b-88951b8b3140.json and https://artists.proofprofile.net/proofs/artist/802fd6f8-ba38-470d-9e7b-88951b8b3140.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 0xefebb2eb8493c296fe914dd8c939f39d12a0e90aad9bbfc248c4017244f76fae. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:07Z), 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/GBMA22564504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a455f4c0cbdf2efb6fed1ac36362f4a019b8d4bff41223ebff13140e3a36f5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBMA22561722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb559b65fa5340ffae799f0cec43b32fa2c8a797be6a0a042b13effe7a66a9e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBMA22564514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62683c70a1bb3a9248b7ff5724ef087d73de34fb76ab05074f9ed8a4dc72dc31. 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/GBMA22564503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507c660f83ce9d269de9e42fde56278d97834c46414b9821317205f656f151f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22561740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da43e86f6c0e1dae506754af518607a60aca1c746e58020022f2f29d49123e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:00Z), 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/GBMA22564486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84007958ea84aea94f799ff06c09d67dc155c24a20b3816dbefca76c8db5eff3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX53U2534255.