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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 0xb29ce907af021a32696076ed913f9929123c20ace53a207b8636ca40a8885bfd. 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/258f09e4-2aef-49d3-90db-7326bb878af1.json and https://artists.proofprofile.net/proofs/artist/258f09e4-2aef-49d3-90db-7326bb878af1.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 0x75e5684488f893f260c874ae7ae643c94401288f32356b65ff3bf233f01a7c60. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCAFP2164429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa81b64f5fdaa6ee432ac8bb3356b6bfbc281b321a9d4c0195cc87037c23bfa. 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/TCAFT2198457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6815e4c8b0401edad7da535e1136f3d37dc11de27d38764882abb84eaabf1cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGB2218148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b42a4b4327a6989c637ad397e0752812a606151a9b4a00538d43a91d1abdba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBARL2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac5a3156e924daa78eaf7d20e88d1dd1c4fef7de29e67166addaebbeb664be7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBARL2401175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db966b6274fec5c7583724c85d3a2b847e2a6342647cff30c29c991baf9532a. 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/GBARL2401176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa453d0d2860176636da3d40f7c5428fc1d9193cda53986bbba8f205625eeb99d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBARL2401177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ab831dea0e4016d728e288068106211232f362f5e62ed7b0a115d7bce878f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBARL2401178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9139a99f17efb3bcc475025778d3004d8e1410c58fe1c64267937302ba11cf2. 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/GBARL2401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dc14e3feed551c84416a8f10943b11a8bb8f9844dff4434b19aff33733d765. 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/GBARL2401181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e95a40bd468292356f97d64b0202646cc902d1d0f8a78a608766ab4272548. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJM2574709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bff8a8de914a2a20578df78d2b59925e941c318855183748c733845b0eee27. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAJM2574687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa885695102139e45265d815db440d94ac585430264f98730d761ddcbb7899087. 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/TCAJM2574737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820a1c6761715abd853481cd7a67f11b98ceb77e544b61042dce32895a818e2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJU2527292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6369661934125d2395092018b8d3f81e2cbcba1d4bc24f1add4ed26295e457. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJW2519881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4081582b84ac0e3990c35c159358f9f08cbf10adfec9d0ffeff01aa807034b6b. 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/TCAJY2508559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5208028b9b674c54e81316f3eb5d55f91b84e6a9b08e14fa8cc2de800008fd. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAJY2560241.