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 0x831d1d63100ed4e1eb9193942ef55f6b67b3f42c2d717bbe38ebd5ab5d6fdde1. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1c9ecbc-fe5f-4ebe-b39f-c548e08a508e.json and https://artists.proofprofile.net/proofs/artist/c1c9ecbc-fe5f-4ebe-b39f-c548e08a508e.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 0x47de9b2b8b4092b00c34679921b52e0e02646ceda73b146648aeacb036cb6666. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4Q2292203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e053862c01e76c1bb5f2058ed09a625f203e0fd11f5ee1f6ea5b8b948ea813. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:10Z), 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/USCGH2375146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32952957f12c1816a2f05edfcc7b861fdb2b2b9d960dfd820866ed01d4ca0b72. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:01Z), 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/USCGH2375147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a433be8aed1ac28b514ee74e2bd2813deded8f49b0a3f40956cb89e7dbce3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4R2229189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91ac154f75176f4e083072e997599a4c5042ed738c43119c25335dcab8f300. 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/USCGH2375150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8235b1f0af22b7afb12e8de1258f28b46c42c21e25ba8bd3505f8613c74c5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGH2375153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203f1e56136ba2049aff585664c6f9dd577e21f36bb07a0c73594df0b5b58fa7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH2317132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589d1603759228bd33bff7cc83f65d279e0be746b3ddbce72e766a27ae650849. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMEM2586448.