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 0xbfea7254afb7c4eeade9277748c283d85b0b517054b4a8011c2ccd70e2ef8dcd. 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/350b280d-9dc1-4719-8356-09630609088d.json and https://artists.proofprofile.net/proofs/artist/350b280d-9dc1-4719-8356-09630609088d.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 0x9331e91642c1cc2d14c988ba4a543c06b4b8a5f3bed6374bf7631722b5401ba1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/AEA0D1844958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3836d394cd060faae2731bf1b8f2fbd37d248dd67cad93c3526887b95ca8b1ee. 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/AEA0D1844959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb551269acc449f1fd8871dd91749dddf8f871888afa60fc7b606b6a06e4f51. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AEA0D1844960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f88dc459618f6bd8ec0b61ccc63a40626ed49a78c2bd3d597b6ea6669bb75b. 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/AEA0D1878556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95479795b44d1c060609f5384a1593f047c4c1d8f9287399c5df3c79e73dc33d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AEA0D1878557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d49911a74f53485043511d87c28ffe43d2771263f53f2b5e5241d92f535736e. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/AEA0D1878558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99307aa11074bebaa0b5c60632c5839dad2d8df9bc7c7bbf7596dabe9e695be. 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/AEA0D1878562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c0354e1499d9fc32404b93aa2c0f75e42c068edc1cca130b62f1c2e06577c4. 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/AEA0D1878563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4455f0211a60abd3c62087d96bc9e70a555ec7195ee42d79a0fca0186328d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/RUA1H2059100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53184ede93f374ca5d35bccac572691e8807b97819348dbf4d81122012642f4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/RUA1H2159487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2711088f62f5a6e995445a779084adb3f1b6d1bdb881287a25d7b34cef952a1. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/RUA1H1866035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d3566a0fc9c17063ac48d37b6a66a4e881150bc557659cbcc14fe4789a5e5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/RUA1H2304585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb40e2623a5bc71a08082ff79ca65733ce58e1b35da08df2063fb7eb5c6b9b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/AEA2M2484837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb86744c4691393fe396f18ecb38a3a7ea5af651f9a96ff9b5c35af68ab1ccc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/AEA0D2400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad77f2fe08c5e67c5961be8fa9da0e8744f12877bcaf47a608b9aaa25847ca53. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AEA2M2540183.