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 0x023063f717a9af1acbb333f2881cae41479d1a5eb8ed75eda6a9fa8536ffe32b. 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/174aab44-6ebe-46d7-9b0e-a487f4704c77.json and https://artists.proofprofile.net/proofs/artist/174aab44-6ebe-46d7-9b0e-a487f4704c77.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 0x21644371ce054965e77320226db9c299976d87980b1a05afa7befb6a9ed5a827. 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/QZFZ71992626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422b7b242bb8ab274c3338eaa7977eb2eec421f426706fea7a21506e34d366bb. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZDA52009008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5d0ea8b2f0f5977bf535a474430d0d14287c9764ade7b108290cb097505dfb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:57Z), 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/QZHN92045339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5310e175bae7b010e8a554c198317520a7e8d419a6e447360e490aff893f92e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UK6KW2100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb37287c558cc33a9c2954bdb0911e116cd56fdae46160a92adc12d1cf0f395. 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/QZTAX2394093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9abd2272894a80e4a1e1bfd6c892f8fa1f7565d84017ead7191b1fa3f001ec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAX2394094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52c23fddbe2cb47a45f19a5ec3385352a078e6f229f3dafd90af50f44034a2f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAX2394095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec477fb2ba4fabb7d1adf320d7ea4261cde51438fb1d4fd53ee67a92887810. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAX2394099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a73dc496e4c9582ca4d3376e8af36f4337ec4296e9e2ec947694d07779ca21. 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/QZTAX2394100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc67f0c7974f1b185f287da5dc81628b95939c3a379adcaaf6320d6a1d09a2. 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/QZTAX2394101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab315de7b586952b395d9a87a0b7d94f5a98b3b0535a7608e85bbdb9a3a415da. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAX2394102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafde3282dfd771aab3cf4a7e117aa3d7d6de7d883d599d35fa701fcb68e8d3d8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAX2394103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a4d98b9007e1404a2d8f64a1bd0634fd3b2607d04106ab095b638c1efdcdc6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN62430214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63614c727482d89b90bab25d453133142c2807910dd075345614352ee5931ce4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6Q2408067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046b291cafa560db66ef4251d47f58ccb1c570c10b6e396887e9002698d05477. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM99V2412102.