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 0x40f65fd83e7ed0d93e3c0df48f48cbbb7577681a1a5c7ef9fec8b8e23dc81a7b. 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/49af40b8-a48e-46a8-ba25-e804afc4db8e.json and https://artists.proofprofile.net/proofs/artist/49af40b8-a48e-46a8-ba25-e804afc4db8e.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 0x225cd9344feba2cb7a842db86193f39267d6a4ddd8803a22586675e08dab97bf. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZGLS1901505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaabf0da28e41936c91bbbcd2196aa26a0a23a8263ae82f14571c88b5fcd96f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZGLS2083341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be2dcebe0fd978ce7506e74ec4a1044c4e5b8e562b937be1585c199619b0c2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJW2153308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97214eef440602609ee6b9cadc84870d90e6de178d91237e8b4945168885debb. 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/QZTPX2285782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f0e606376869ed91048946504bad993ef5048c241989a4e3374d22bc4e4b2e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTPX2285785.
Mi Camino / Pájaro Cenzontle / Que Le Pasa a Mi Camion
Tumbando Caña (El Alarcán) / Al Gato y al Ratón / Yo No Bailo Con Juana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcb95b01a68ff60e4eca0bea63ec40d3a0e1096e2ab0eab832b2fdfda0c77c6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USY1R2409509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85aa31c679fa3b887cda02adf315a6dc8822b3bb6a55db44e8660f0c48c06fa. 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/USY1R2409510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8510dd22adbe777c454c4ef4262c6aecae4eb2932c6a140bde3f8a5fdb166eee. 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/QZTVM2419622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11af57e95e2cb1d07f5fbb8f84d6f50193700f5dfd725d6f7e648e4675fb702. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTVM2419623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0173022dd58406e51f58240382368b6a59938e0ef054e28a190b569abf770. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTVM2419624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cddc708c4503e268c88c06477c0773a8f6646bba9742bc9ef72095b80afb93. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTVM2419625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4b4a3959a34a5cb2fe5dd2d8499aeb4f4fec75d84575ce49004144cec1a99c. 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/QZTVM2427061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21768127e8161e90452f804b00d66152e43c5895ad1ffba3ea4bf8cbad450d80. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJZ2449800.