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 0x2c289113043dfd546af15fd28373dc5903817fec8ec498a5ec7fdf4c7f0f7ab0. 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/2a6edbb3-2e55-4079-910a-f2eddaa6658c.json and https://artists.proofprofile.net/proofs/artist/2a6edbb3-2e55-4079-910a-f2eddaa6658c.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 0xe71a4f6b0139b492a186131ed5a577786538da33f62f901fab15f14224c423dd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/MX3741300805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94ce59633ebe4a49350f030f43202d7aab7933776aaa702c06d826e15659e8. 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/TCACI1528508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2934ad5f071e07b56d95041bdd121396d609cfc9bff08dfdd04468f8348338a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ8LD1905449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7de4fd6f7797a3cc3479d4a78aa76d1310dc0145bfb3fd8ae855ee5394326e. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZ8LD1905450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0248b7d26e6bcd5771eb49be9c5fb5c00fe0ba6cd4d0661322fa70755ca99ab7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ8LD1905451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f82996f6c6d3c025bd835e8200efed7b2564a491723edd01e434dcd433a14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ8LD1905452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1e3228bfc5cc924ce0552645628c5e5ce0c3d993de8b32401665450625021d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZ8LD1905454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0002e67ccea3a88159b6258b35d1106763741fad05671f3c17db60499d81e36d. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZB4J1898045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35911122e8e63e7c3295d0cdd184b242e98f20b0cef96e01ef7cbdfe50dd5e23. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZB4J1898046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7606f2db605696c30b11ddbf5d605610168fd93ef9d4bcca56c8cda093c6ecf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USA2P2043013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af17af31c246f033672b5868d6d6bc29384d5538d39b090cf3ced2d17faa269. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P2250454.
Perreo Post Apocaliptico (Doble Tempo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b77fad80052f4e6f44b42b4b57676575e62c34e6eb94f09f9ea95f9269a086. 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/USA2P2250993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad999b77af175fa3fa57b305bfcdde47b56ab4c0f1ad5c897b22b7ea94ec82c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USA2P2250990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe97df34c05434efed748acab2a09cec76f1179ff9c8171277e3cda709e0c0d3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6K2456863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ab663ba0f6dacddd2e7693a61f11237caa700d85d79b306165f6135ed048f5. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USA2P2265128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9fc6f135c8e2261cfeeec17fbe652d9910aaadf75248eab4c5d4f5d630c501. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6J2311016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbb4642fde425e19659b6ed0be8fd2eb5290de9565ed40e9244b239d1f9759d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA81807642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397b9e95245a737f2cad3ba1cbcb1fb349e25776242abbaeb87e9fcbb758559c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ9Y21776430.