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 0xd8e5e637d2239942f915bd80fd8f307c40ae7c01ea4a5513083819eb11a582ef. 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/c7c05837-f9dd-4a1d-8e18-9d8668cc78b1.json and https://artists.proofprofile.net/proofs/artist/c7c05837-f9dd-4a1d-8e18-9d8668cc78b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il liscio di Omar Lambertini e la sua band!
Ballando il liscio con ...Omar Lambertini
Ballando il liscio con ...Omar Lambertini (Basi karaoke)
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 0xc652ef38c4349f25cdbc1f57b8e4730b637fdcb56b3a63b2c358079675745d95. 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/ITM031400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0cc9c4cb1c7294b6deae4b5fd3d8ada5fe00eaef4c7ff666bb89f43c45187b. 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/ITJOI1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65565638c0e074cf8975674e7dbe9a2226c83694bf05c421bfbfb0ce9c8cd196. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ITJOI1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe4231eb1eb817f53bb1add67b7d90c7cf9a98cf528a426047777ada7a516a. 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/ITJOI1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e1fd8f210256bc5e633a8fbd6944decedd5ae04d6613ef98f285d20e285383. 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/ITJOI2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45083797b7f1f5db4529327c40034ca174f3b6712f3b1b62b6ffa8d33669f1a7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITJOI2100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0623c4ad96652b280ba335a1124b2bd1993544f07190fd3cb57b2930c4ed93bb. 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/ITJOI2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43822e0ca9de3d63f0cc0183a391838bf338a2c85f7b1cb273e39fb4468d21e9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ITJOI2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c47070320028eb24d16162e0777ec6f663d22da7f094568eac50acff3487a7. 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/ITJOI2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe4a2272d781ed4db05c518c39aab4b74210e71ff1e29123c7106b460d16c03. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ITJOI2500042.