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 0xc4cac06ba253e7e77fbd6eca5fc090e9e1894b3f969ebfca66456eaba450fb1d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84beb878-be4d-40e0-83b3-1f924fd34184.json and https://artists.proofprofile.net/proofs/artist/84beb878-be4d-40e0-83b3-1f924fd34184.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O gamos stin paradossi - Traditional greek wedding songs
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 0x462774b59e0d35e624248f46124e665556cc8397ee83d34ce42e24cc43501e04. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA371174465.
Laugh, Laugh, Laugh - Goofy's Jokes and Riddles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0150c7d7074ea58c5327ca0c8bcd9c6c8a0320046f95d0168da84a4958da363c. 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/USWD10527631.
The Little Prince: The Cranes Are Flying
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e12ca66d27d5837501db4d6a9c6ca968c2c75611f6d4d2b69eb03cf7433a42e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBCLS0400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85e5ccde7ca51dc86d8258315093c0bbbf9fed4c526ae0269052c2704ac000f. 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/GBCLS0400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c47cb33c76d395b9940366950d7fecc1fe63271b5b818a5fe536ebf097af5e. 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/GBCLS0400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b3a1d8cf8967abd93199e810ebef1d054f52286f9eec9a1d0dc7aea8a71282. 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/GBCLS0400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2256c14e48a296c7d41281718b9cc699cd0ad4071053d01b141dda9cea30e4. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBCLS0400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f6d980e3d64d490fca9452ce875d274ffeb3ccac9393413f8a9682d35807cd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBCLS0400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6898f1dc3094afb0c7607160c4aa6d72222b54d6b21495339e28e35be273ea. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBCLS0400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144fd3dd41f475ac27f5dd8882da0d611f80f424c302bdd6cd9b97fbe3c75c93. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBCLS0400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6697082c8676b83f044f4c3dda3e9a819de3c10ee213c200406df7de83e0d3. 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/GBCLS0400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf256570e1f21f381706a48e57d7c24aad6658cfaa816c49b117c8110474e7. 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/GBCLS0400055.