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 0x9c2e4ab0264c523d7263dfa337bc4ef63c4dfb26e815b24005deb89bf700193a. 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/ca212248-3e98-4073-ae71-831303f32eed.json and https://artists.proofprofile.net/proofs/artist/ca212248-3e98-4073-ae71-831303f32eed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0a055d7915580cfac604b98287bb8e968155ac670b4fec6fcf5bcf81ae644a33. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ITLU52064835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7632b966f1f812fcf1f656e2ba62279d4281aa74fccc73b764fa22ebdb17aa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ITLU52064838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b87ab6e65bd72cd0187aa68949ecfcb9b6892c8e4534fb661f37c770838cadb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ITLU52064842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374c42980463e04855205b617e2d69f419ea772c1a4ba62ebb867888b673a79e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ITLU52064845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043c4d00acaa0be8f6d66796e70e7f30f119c1818f6a8e82c1b9b2d7e2dde77. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:29Z), 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/ITLU52064846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96d6d951ac29fd8f0532d8c554ff3804e22bca92e791381b27acc4fdec11f7. 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/ITLU52064847.
Musica per far passare il mal di testa: Onde delta, musica rilassante, suoni della natura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90c6d752ac4c4c1e7fea918db423bef3f55385382987921567d4b824b490928. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITLU52053692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd68647fa97093cc5bc55cf9108228daecdfca03352e9692c95affd26be3fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITLU52053693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248787c6894056ae286b459f21f866248125936317cb99603f7f3e58b71c5874. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ITLU52053694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601bb7f81199ad86064d7de2bedbcd3696a199772ba5daf8c7ae9862e4e8362c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:41:10Z), 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/ITLU52053695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d673e021cb175aa39399a896356f2994d4866496f9ac41864906174fbb32777. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ITLU52053699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae890698a0c59e10c8743d5ab93553dca337aa9f0b3ec4ca4a07a62bdca67dd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ITLU52053700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6985a80fc800263bb8b338435c42106326629507bca5a5dca143041f752006. 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/ITLU52053701.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e607674b709efc138b20ae766a17a2784f227c7424fad5f7f095f394988d6. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ITLU52267632.
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