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 0x4e8f7ddef2f149c1313a4fe98403a34f1756471d4f8a81cde95ad552a34de7fb. 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/0ee3f76a-a2ef-48bf-bf0d-c28f420f5150.json and https://artists.proofprofile.net/proofs/artist/0ee3f76a-a2ef-48bf-bf0d-c28f420f5150.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 0xe23c62bb2943197bb8be4553c732c03fb2531a6b570effa282da7742fe7cb365. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:31Z), 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/GRE010400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eec0c2dc9291e58035a8bea9c322c226daa362a01c3a97574ff1ddc15e877c. 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/GRE010502029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90bd840868795f3ffbe9df3af49b265729d8788a823551e8271497ffe476caf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GRE010600687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42508e29ab1c49897f52117a5ecc8432637f5576edd05cbbaf49a84fcff15f05. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GRE010600688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16589e7de0d2977ff47b3a9b78f5db6f59328f4e786561028417aae26c8a1f41. 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/GRUM71700835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa382dfe591f5d3febaa10c17d448dcb0c5c44d426ff87f39f198585f45c51f4e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:48:07Z), 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/FRX282145301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609a2d385354da606eb78cfd6d74c6c9ebf236419c8dfc201686f85893775e1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:24:54Z), 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/DGA062222118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa3835cc9d65eb153b41259d04d7322d19e22a05bf356791c8bd35d28d7e3ec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1601440.