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 0xc4ad5d90478228986eff06011fbc6fa543216b5e154889218247b25fd5c5eec1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7610dc2-355f-46fe-9c71-6ef4c777cfcb.json and https://artists.proofprofile.net/proofs/artist/d7610dc2-355f-46fe-9c71-6ef4c777cfcb.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 0x0d991b248f5d0e62911c13a1bfc6fe52d1a84bff993643148bc1c1a2fb4c5b2c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/VNA2E2313180.
Hòa Tấu Guitar Không Lời - Nhạc Thư Giãn Cafe Buổi Sáng #3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d8b9df8293911afc89196d01edc25800153b2b20baf5c4b8ba5f4e9ca2da8c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA2F2300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf80c990499241708ea9d2ee81433aadfe614d6c86b0b54667b27fff44015615. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/VNA2F2300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267bc40c5a66099c43d4b7c1149c30dd8a9d0ab8ebb01aa995752500c43fc337. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNA2F2300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aff3e823e0e55920bac9cb17d373bf39848ac2bc1a440b0521d7a146febf60b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/VNA2F2300383.
Hòa Tấu Guitar Không Lời - Nhạc Thư Giãn Cafe Buổi Sáng #2
Hòa Tấu Guitar Không Lời - Nhạc Thư Giãn Cafe Buổi Sáng #1