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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 0x131957dad4d33b766273cc8c75ba8071bb9f70de3f12f72ab6c8f9cbd138e0eb. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/758f17ab-6ea3-47d3-8cf3-fc837934027a.json and https://artists.proofprofile.net/proofs/artist/758f17ab-6ea3-47d3-8cf3-fc837934027a.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 0xce835c2d8ce549c533f3fc0213aea4aed5bcec4df3e0c2730161732918571374. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QM4TX2231026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb134e54c3a7b53acb59e43aca1f551fcd4174f2e6b46a56c9b9280e0511de06. 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/QM4TX2231027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c32a52124e554fab0a10c677fdb560cdaca589f249d18c92147301d99a734. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QM4TX2231029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db207002205bd7d687a5965919fbc55e0bad7d3f7ab6ecef4e1f8a5386ecbb. 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/QMDA62250181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30de164f5f9eddca1c614e63a476dafa30539d7247a70462b3bb1ccb1bf54bab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62250183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cf623e22847d49ba04c22ef52c326476b17433d0b08a3b3481f0659689b851. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMDA62250184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3850003ae6c8050014394878cf351d6b6634216d8176b9786e02cb9e5dd747. 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/QMBZ92305869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe555d1f14407c6a8094d287cc9fd27245970ad06585f29c6a86cac180f0cc1b9. 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/QM6P42472884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fac97d30c7d04bd73f6d5e4f80b4fb4b176e596b471c57191694fce6a2f44a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM6P42472886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf24d8a8f41f033f6adb9a14df8161cf25c1b672cb698f893f1076785fc57fb. 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/QM6P42472887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c813ea92e5170cae3a24010b338b49463e537dc0eaaa66d72628e6cd63b167. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM6P42472888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0a83fc228d013e8b6edca7d3fdbbc18d5fc897252de8fcdae9c4510a234ce6. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM6P42472889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40000ee1a7d777fdfc819e8de929e477d8243932e1240f9c341efbb73b80063d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6P42472890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cb404524ca3753fb7271ed163730dc7e3e777e1b1c7145eeb227f4c738702d. 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/QM6P42472891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d33cc2ab73abdc917c706b762357b5dcda963cf739e222e5ce646ff8e40a93. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM6P42472892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd665864987f7dcbf87f4583c5603acb55b2d550c29163f33abc92b8c0d8d1ed. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6P42472893.