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 0x7ff915b086fee6fce429a01356179e626a9d5ec07c641700c93899852719e032. 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/03abe1b7-0922-42f0-99bb-879b7388b260.json and https://artists.proofprofile.net/proofs/artist/03abe1b7-0922-42f0-99bb-879b7388b260.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 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 0xe298ab3cedf3021267403e39500bc5e748a5878f4cc222b40f006f91941fd217. 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/DEZ620500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e00ae9bef9be572fb58c2449194feff9eb5c20b3b3432f5e1f403b7aaa85c9f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZ621000038.
L'amour Toujours - Remixes - Hans-O-Matik Bigroom Electro Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c2b4bfd92f2c739e44980e01d277ae38a8df6b950e3f761852d5615da3ed3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:39:18Z), 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/DEZ621000044.
Dancing Circus (The Entry of the Gladiators)
Donnersong (Thunder Buddies) - Brisby & Jingles Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc007465f1251fc7f91e15bcee17623c3cbb2ce9ff6cd4dad87a30ad9918cb259. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:05Z), 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/DEUM71202884.
Losing Love - Timster & Ninth Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d299eeeabe5f7033c23db80faa62b040dddc51821bc0720c18d1d62cc59b6cc. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEZ622100191.