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 0xbc0e645275eb2e45e15be7bde833e7a35343eb281dd334e7b3a3f929cb2a226c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ce140b5-360b-41c8-ac93-71d4e9450902.json and https://artists.proofprofile.net/proofs/artist/5ce140b5-360b-41c8-ac93-71d4e9450902.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 0x4f99eb3b3c9bad71ddeab50ab568a821bc8a6c9016b4b29f87cfbfd162c7b604. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:08:37Z), 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/QT6E72558036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c50cd607e1f3e2f796cbd652b16a1a2ff1f1d7ad23488395b39651514326e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:54Z), 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/QT6E72558030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4cc4a8c2e2d154ef9f7bdf95cbdae9dd474af691590f4dd6f4c3edb7fefc0c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E72558009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32968839f07b4fe9d2f479d488acc7b1a83ac00aa6e712964225e4bd2cf6c2c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:55:45Z), 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/QT6E72558046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f0f49e57cc35fec664df50d6a2e5bdec9b0480c37d4062560c5fe5d7c13440. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT6E72558029.