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 0x8613b70a386a073ff01e188a58b165d6b184e5d1ca83fadc5be2f12e5c5786c8. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b62a7e26-1ecd-42f9-a30c-ac8f06cbad06.json and https://artists.proofprofile.net/proofs/artist/b62a7e26-1ecd-42f9-a30c-ac8f06cbad06.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 0x1d200133c27cab5e01c63e011372d94231bc3a30a1c296b90df56adfe81081ac. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCADI1755769.
Ho fatto pratica (feat. BledRegaz, Lamainoxy, Lamaislam, PMC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2805282c0704ae4946d2f36ce74f78bcc86261f711739c0d671c05cd204d590. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCADI1733198.
Tutto il mondo (feat. Mheedy, Shablo, Lamaislam, PMC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd30c580b458ef6cccefb9518f15d8b9db33ff93cee4e7d3031bc8efb837b198. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADI1733273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90fdaefd62f845b9223fecbe3368156a8c9beaabec87563c4939e56c97ecde. 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/TCADI1733439.
3 Mcees Extracees (feat. Mheedy, Shablo, Lamaislam, PMC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13219c0b335876c012336c0ac966b201b955bb2a8b8e9b6e5e5dd2ec337468ce. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCADI1733751.
Mezzo metro di cannone - PMC All Starz (feat. Gianni KG, Lamaislam, Mheedy, Rischio, Shablo, PMC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df223531556c8a779c62cdd3dcaaa85c6ed76c0d43b987aae2c540602f0210. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCADI1733757.