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 0xd8bf39f0734c77d685a50282f34d6bf322cd3d65838f5acc3f8f881ede54d960. 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/1ae57318-4a23-4163-929f-e7afa51f1b24.json and https://artists.proofprofile.net/proofs/artist/1ae57318-4a23-4163-929f-e7afa51f1b24.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 0xd9c5a237866b38d18f352155ebef791b816d55fa2744957e2f65272f9e998fde. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:15:30Z), 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/GRHV10500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82df735b7cfcadc1415dc9be8dd06a272e34f9c80280db430542598b721edd10. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRHV10700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175db54d7794799ae27c6b8400f0853c3041013e36e83cfc915219b20dbb73fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GRHV10800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb869e4d6e4225793f5ce65257ab4aadbe485ae74b568f53bfa502810377a1836. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GRHV11100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88ada16dd390f6f946a234a26a971b8e37136967f7cad9d2c866743c9bdcdd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GRPH11700672.
Eiha Kapote Mia Agapi (Nikos Halkousis 2023)
Eiha Kapote Mia Agapi - Nikos Halkousis 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefccf5f4db8812ddd0a1418e6e3ba169f85aab9795ff07c467fec56b4a84c97f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GRHV12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6b8cf3aa0a96cd857b5c6f8aed2601c375e4eef4389af685477760a9a9c78. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GRHV12400442.