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 0x9b07135ed979975bfa8c0655925bb056403ded4cbf34eca7304a2ae91fc8f325. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4c677a7-e3ff-4bd8-a34f-46b45fb3f041.json and https://artists.proofprofile.net/proofs/artist/a4c677a7-e3ff-4bd8-a34f-46b45fb3f041.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arif Baloch - Masqat Wadi Hattat Program, Vol. 222
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 0x4950a4c790f04a61fc23282980bfdb8839015f6c0f21bf120512a09227b1a952. 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/PKA061785917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58568e65dc09537999552c514c03626f7cc460bf75a3739872c2021e9f9839. 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/PKA061785911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250ee787e6a86b3f4d82633047c4020874af748f1e35d455ae4592c3d958a5b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/PKA061785947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab6990cacf1525f12f3752b41b08bcff1f62766b1abc904fd8063aa14f13002. 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/PKA061786975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7202d21b299d54d2a32e37d6e64d4ff3efe0541fe96bc32cc6fd3d6e24f1ebc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:01Z), 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/PKA061900837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e684a06fa65727b2f2c52562f9bbe6dd8bf95f162b3e60ac3c8eafdc96da0a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PKA062329129.