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 0xe3c417a556867bee1273894a38c0dbbb2eeca78f4cb055a7c5a258b65d0d7fc5. 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/527bdd1a-819b-4346-bf6d-1bef028a6658.json and https://artists.proofprofile.net/proofs/artist/527bdd1a-819b-4346-bf6d-1bef028a6658.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 0x28f72247ae735ade4fd2decd6ae4cd79cc0c4edd06e091fe223f9a1124dc3ba4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BRY152100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755f086135fcc973735b18c74b37aa51ce14bcc2403ea6a779f4292b64ca1a0a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJY2120160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82971ef91819988324df1492e6176dc5fecd1af2a6ece9560837ad4ed680ea8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BCK2Y2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae471c3a3e70d0f31c01fb6d6c5a2620f8ac298ae4cabf1a932c2ed896433ea. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BC52Q2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c52bf986eceef9983bb90c301a5178768f7c947f7de388124f3df67dde1629. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BCK2Y2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb19b47956d4abab860903da4427f104feebdbbd87c910d257bb900e86e4455. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCK2Y2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4590f6b99c09cf5a2dc410ab152b2c074197d03e9acd47e08a518ac45681a22a. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/BCK2Y2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5468e97c75d097bb33dd1661feb917f567dd955f1a370c4c757b22911e073f68. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BCK2Y2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a02cc01343cabee368bb5dad7d538b411d6a5611abbaa8e18f2b90839a4ae46. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BCK2Y2500009.
As Digitais do Criador (Campori Aes) - Origens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d299d9f016db50b534507c5ebb4abe9038d7549c2ab73156bf1300d0ac7e1f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BCK2Y2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712615583ab696d9d8b6ba3c2282bdb620fd3ebfc3e85236424fd8fdd2eef54d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJY2586561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078ea2b2a485d6f6beae82420b209df8ebedc6264fb62c3e58fdf4f6822d18b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BCK2Y2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbcb4cb354b0a377a1b168e8b3b098c92e59496e5edb607162513c7bdc6b5f0. 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/BCK2Y2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3fd9c4f6946c268b831ffb3651a961b4599d8b9014d5abc291bb754a7d81e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC52Q2200067.