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 0xf6b91087e9e71a7c3d8598b4a6462fc6d869e492becd4f8970dc2e7031b6bf55. 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/9b9c4d92-0df8-499c-a38a-af60fd84567b.json and https://artists.proofprofile.net/proofs/artist/9b9c4d92-0df8-499c-a38a-af60fd84567b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chocolate Con Almendra (Remix Reggaeton)
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 0x8ce9e4232a8457053630bb7c0d0e8e3373f8dd5ace68db9c20f75882aef99c34. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:09Z), 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/US7VG2494147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c899a8e2f7fac73017e3c64188f2498d3a8cd727300d028bd066ca2f21617c5. 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/QZ5AB2465058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fcc3e6e2ef9e748edb5bd7a6b63a24e09568332e162a8b1a5a67cffbda77c4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMZ92418426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822787a070080bbcac92368e618a58c1781d57cf6529afa1c9c7fe2dc2f3a2a7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMZ92461990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b75a9c25f6dae7702528253cdd3f4842c00da712c6f1e576b3151bc356d6c39. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJX2424065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8570e3ad872e0ae13a264de44df55fc097d101a47ecf5c7ef287fb94b0bba47. 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/QZNJY2436895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdff70688f651a932fe12a4d702cd0b22739ded28ba768ed447893a43303527. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJY2475496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b006965bf2a3e8e45580bc03d0ecd2835a1534505f573d0ba398ca11d28412c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJZ2464993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92928ab7068020d09df6aa4787c7e591f78ff06b607f8bc7715e222868f8461. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTPX2461904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00327231c58f9c92b1dd465e747cf9e1481833f1432b2748718fa8e5035513b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:03Z), 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/QZW9L2437684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa9f7f0088f75d7a86dd757f3d42cf1b1235f0fa9b7500e8876df892fa55c4c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJX2502064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3994d38a518c49fc428ebdfc2c2fd8da098e5cf1236f59418110c3e395750a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTVM2598330.