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 0xda674a66d4871e500cf9a1d8a37b8cf5a13d8f6945dec80e14de8a2918eb14d9. 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/e1e82ae4-d5a1-4dee-a174-73958e0052bc.json and https://artists.proofprofile.net/proofs/artist/e1e82ae4-d5a1-4dee-a174-73958e0052bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Me Corra Cantinero, Rani Session Op. 2
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 0x5aee36e67c085dbd2cb0a8fcb7c374c34e6013ae65d7e5cdfe370cc3076a8dfa. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/VEA0E2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa46478791c3ac2c69aedc166059d2ba06deb6fba1e9ec8994368be9c8666df. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/VEA0E2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84bbfbb83c8d1ec6768c9064f81ec16c98920e8ce358011aaec28888f88ef36. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/VEA0E2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032fb3285ab9971017d4014125f7204ce37f42096f8c189dbd56e53b57a65d6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/VEA0E2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedcefdd790b81cad0ec974e167114a215a95949cf2b2f2ec2d86d1eabfe6517. 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/VEA0E2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7d6cd75bb31fceb7900c61149f91e72b2ec4a4eb5462bc5dd9ec89014102c7. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/VEA0E2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1290ce78eb434709dc2761f39b369deca9676f461382c2c4fd25b8cc0f314f3a. 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/VEA0E2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05408bbac482348b735e73b9bfc95849c118fc847f087dd0a93f627ac6dc8a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/VEA0E2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae6b694582490896edfc7a3fe52a36c6cc3cfceaf719be71b5f10df1c349297. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/VEA0E2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c2bbfb1c0c52c5ff17cc70cb25339fa6845811ec309e1fc38dfeff01be131. 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/QZ8LD1970616.