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 0x53b5ff61a2601385737ce002f7ad69190a47787c292265826a35885b2ac2f3a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4dfbd99-e0cd-4630-96e3-270066a0969c.json and https://artists.proofprofile.net/proofs/artist/f4dfbd99-e0cd-4630-96e3-270066a0969c.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 0xf8b1027684ef8480d0e7ee53028a64b83c6568394781d5d08e21f77b0970ecc7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:25Z), 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/QZ8LD1997768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb1fc5b926c16c5810385d7d34930e66d099a775f98e5d6fab558262db231b3. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:44Z), 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/QZ8LD1997767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487a4809197e2054f2039d3bd6aede12b55bae1806085466240f29fce195e06. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZDA61945096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f62008a0e5e4bd714b437ca7fe5009c555a013e6411651f824f7d0f34f87de. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA61945099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315a564d2a2a6322db1481c3e9fa92382fbc8fb448b2047a7d9f0aa4238cd54b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZDA61945102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94bb434fda9fa5a0124003599d369f7c83b55392732e532401c5a29169053b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZDA61945103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbb041a7d68feca88b43f4c96668bcb28e4ef84a0969abdf268e8344d27e15e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA61945104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71570764b1d8ee9099e6365d715c2372a98256bb726d1ad9ccf87ad553e69b9e. Chain 2 (Bitcoin): anchored in block 957529 (2026-07-11T06:30:13Z), 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/QZDA61945107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1669f40de71973cc4e9bad3f2f931fa41a7d01a5e446dddef1fa3279957caaf7. 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/QZDA61945108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845e222c3360e912ee126d4724a4b699e4c1bd1fb013f2e72bad68c6787661f2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA61945109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60896a6929521e83d48497ca9eb8719af4a3c70edb49b07c38167e7627b37f9. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZMEM2178479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69216cb96353bcea014e81a00dcb1c65002b35849c6af86a86c64c42425b3a4. 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/QZMEM2178485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5f660ab9628827013aaee053bb3e9c5903a1307e6bf90bf46bae028aa518ef. 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/IL7532421551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d43ebd625ed55e8b10cb0cbb9414bba69c57ee4d1dd40d2e4c3095e78a6bc4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:28Z), 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/IL7532212855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9451956aa6bedb14dde964eb1c2d9734bb05191013e8857cf66bc998facd4586. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/IL7532413023.
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 0xdc4c62aeb06ab333ac6623c7df36f50c023c5cd1d0b6b2c347da5a3934f4725f. 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/IL7112001555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bffc1ac82b9d23f177af1a2159f712ed1b4c25841f739936a2cd143ba39aca9. 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/IL5842134279.