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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 0x5ad79a4973a98d398dfa8af9dca13aa3eea7f6f16dd9a903c42fdbbb2cac7cd6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3e101f3-3b15-4cb7-a343-7559b1f15002.json and https://artists.proofprofile.net/proofs/artist/a3e101f3-3b15-4cb7-a343-7559b1f15002.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 0x750c925c2016e8edc63693eb6427540de64bfbddfc5b84b1cb6de8d67acec98c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:05Z), 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/QZFZ31922300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2295e1fe761a634a6d53dec147dc0c8f0e6562ed8de398431afeeec99e85db9. 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/QZFZ71967467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a4260ac05ea604e26fab15cd199f8a5ff92eda48c5c36cc09b2cd9ba4dfbb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN31912823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75fab7ee4cf89b37d24d204c882afb724975876920693226db26aa76e817649. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN51929319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68337efc613f8d6c5d6ad2e4207c7a7e01c5cf3f3387f38a45dd8756ba09686b. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZHN71936699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aea16e2a0f3634f0e047baaf2b8456186934ab0fe975c87c1c963a3871988d1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN81961229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180d904415d174c1460c2bfe6322002a203bf1dbde913c0f1e29ca96afe775cc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:40:59Z), 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/QZNWY2008145.