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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687bfcfbdd509db661d07a04ffa94fc021b89bf7fba9546a5947dbd83f6b693. 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/6f39a133-39e2-4c29-9cf3-bd74507abad8.json and https://artists.proofprofile.net/proofs/artist/6f39a133-39e2-4c29-9cf3-bd74507abad8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d58bd9b1ab5f9b75c193e0f2aab0496468fecf1cbe9e99c6a90cc1461f504c. 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/QMFLS1500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf657483ffda5b12d6631064db8a019d1c45893e0b9c257693fe81ed4743d4bf7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMFLS1500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14330ce110e74e4531754f5db5635cbca10b8a0147d9d9f27de3949627d06562. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMFLS1500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62357f81336e593b30a65916c7def40f1c22c06b5206e20411ea07971e58f50f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMFLS1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e7ff218d0082ce870b489b64a4e33c0ff007002d7cb7daa96851d1a869a820. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMFLS1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17101a8f91a8a738244d4adcb7e007e73332b92a4a64b58f913463fbef037c89. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMFLS1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6c4ffc34d2a66da0dcf4d52c965cf61586003c2873132b720af6f66d58361d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMFLS2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d206f9b82f873cae936528e78bd1f4370ca0e263f2f7aaf06b2235bf1b9b4d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMFLS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753a185a7b780401dcc263d3f9a93d03005ac2eeb301b5b0d90bf9cad50e0d31. 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/QMFLS2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc447c70862bbea287f01b1c3fa3da70ad711e299e0277584843e7b51eccae4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMFLS2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b5807fc9819d158b7c58385ed73897698ef34acf332ee215340e894eba84b7. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:39Z), 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/QMFLS2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc447c70862bbea287f01b1c3fa3da70ad711e299e0277584843e7b51eccae4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:06Z), 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/QMFLS2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc52fcc648e0dede12a77c457005a69ced2e5887c49d814ef499d8f3108756b9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMFLS2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c5f943097045aec9899ec5f7eca7c4f1a260d48e7ae15745b91bcdb08894cd. 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/QMFLS2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd994346aafc13c8c2533835df5baef269f51867332f9600c2590bd4629e68ebd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFLS1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4401c25471ed901039e782399ace78863a7b6485b93e0697b3d1fbbcc135f69. 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/QMFLS1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d4cc8ea948a58643e02e3fb9fa907e654595602e53382f0b70afdd8cd92f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFLS1600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa852218d266c9eaf77d0726d1990c159f948d995a833379453bcde66d861b3d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFLS1600149.
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