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 0xd3a1cc311ef467ba2b44509bd5154d7cfeb57fc3b87e39efe35ebafa955a2317. 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/cfd6b2a1-6ec2-4bd2-8a6c-ffb5e8cd31ee.json and https://artists.proofprofile.net/proofs/artist/cfd6b2a1-6ec2-4bd2-8a6c-ffb5e8cd31ee.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 0x690f75cd76a69a1a1cdfe1b5274403db967828ad6b69d2e9f777f94ed6c5e889. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ES71G2216509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3e73918efc71ecfead1baf4fcb3e90bdd0c80d8dc4997df189af28489f32d. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/ES71G2056359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76191c632c9168855e7c3c47c86e1130c01f4859aca9da128caa5432e72ce0d1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ES71G2205247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0149e4b5c1c1b3d502f9ab1baf5279696a91424c0df4348e832fd8743b6eba6d. 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/ES71G1934302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7d1696eb97517a8843337fe29b8149a3a6160c0a80bd1fecf187b8fc3adbd. 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/ES71G2216519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783b4771446a1650b62debc08eefee8373760819d84ef3d0f9920daee9f5f42f. 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/ES71G2225284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bcca58e8c68255036c9e7dc1260887522b855b6e7e5c103bca658236148642. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES71G2236396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b3c18ab5a2751b9ca172c03033111977a4312cb68f737aa41e808e886b6bb6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2248162.
Último Verano (Marsal Ventura & Jbill Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50a34b19d604b467acc06ad295e4b57755ffc87253bce92488d2e85967ab68. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ES94B2400055.