thumb|right|upright|Marriner performing at the 2010 Kitchener Bluesfest Steve Marriner (born 1984 in Ottawa, Ontario) is a Canadian multi-instrumentalist, singer, songwriter and record producer based
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 0x1313fdad23f529fec2f443ebe48631b5fbcb9a6069addf84455172e1f965e038. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d17e6484-a04a-4c05-a036-2fe4b2c906a4.json and https://artists.proofprofile.net/proofs/artist/d17e6484-a04a-4c05-a036-2fe4b2c906a4.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 0xa7999d6593bca10a44598d4398ff8a72f704c47ef1376bd001e189d236e51b13. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAS432043303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7999d6593bca10a44598d4398ff8a72f704c47ef1376bd001e189d236e51b13. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:57Z), 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/CAS432043303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7999d6593bca10a44598d4398ff8a72f704c47ef1376bd001e189d236e51b13. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAS432043303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7907e4dd6a209234e074e07ccd20d34c09c80cdd464074ccd37ea79882e3cd. 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/CACB12500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0477c82d91810688ba8fd928c210e20f5de3ed37acd6f9108a724608e7ef04. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:52Z), 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/CACB12500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39de9978381cbe9b8ecbf2051d6f64f29252aacb92108414e94c5d13b88462ad. 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/CACB12500001.