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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8c2f445cf4af3cb043aa4315fb635c02483b9b2146e80b00ef408359aec8ce. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/542f0e8b-6da2-42a9-86f2-6bb80313bca6.json and https://artists.proofprofile.net/proofs/artist/542f0e8b-6da2-42a9-86f2-6bb80313bca6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Mohist Architecture (Original Soundtrack for the Game Minecraft Video the Mohist Architecture)
My Three-Body II: The Black Forest (Original Soundtrack for the Animation My Three-Body II: The Black Forest)
Ballad of Sword and Wine (Original Soundtrack for the Radio Drama Ballad of Sword and Wine)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed424794afb93836b1d27d9f0fd1e840f2eeb1ad6b04a7da016bf36e324c2227. 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/FR26V2057311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e46152b7b56f237df3b78e8cf95f3ab4d800aae4b26d7cef42ccee4b9b6f3. 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/FR26V2057312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b0a3f71af5911bd4d3f297853bc366fe8275b44069c4c3b0cca166e6ba0cb1. 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/FR26V2057313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79bfeb247331400e31a8523b5d30d55a077383be22eaa56060fee481686e6c2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR26V2057316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7abcd04d08444316673414c4fd42baa54c4a17f07afc61b8ae4e92c1d84495. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FR26V2057321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c359b75646e1af1d181cd4e7e229398ae345d0950431960fa9eda9e9a1a4dd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR26V2057322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463f183cd0f2c92b80f43b137611d97b6cc3a7ce45a7928af8e44b53cc40d0a. 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/FR26V2057323.