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 0xb2aba8cde8df1b3c7f31e314f6a61fe89b81c9bcff5643c9247fc83527c043c7. 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/34f76a0b-a2c2-4a8c-8c60-7531feabecb7.json and https://artists.proofprofile.net/proofs/artist/34f76a0b-a2c2-4a8c-8c60-7531feabecb7.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 0x2eacb2508df18f13e0206f18a6df7337b0e4e6f2e623cd45196d999270f2c0bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G1613538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeb35e2da3758c78fa596f8efbc9b51a769cb58a059833f8ee573722a34a803. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ES71G1613542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d10b71bcdcc575d297cd03fa8219a02f3cba1197c06e62d875bfae9d4c9aba1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1613543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90725026f8272fcfcd7bfe84fe051181497cac2b35d4c943508f15ce3abd5727. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1613545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade65cc9749c076715dfff81f6d9f3b8b8e69ce1b69857251a775ac151fa5b4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G1613548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c5193514b99bb1963231b153daf3b9ea1a3bd11982982a6e3b305a795b5a75. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G1613550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9da3be29950baa530c6fd7235aabd5fe5972a714d87597f81d16236a3f59ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES64E2202310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e067a55068eee6b90d23ef32c91a940533388893e29e8dbc34ec7070950890. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G1309386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be6cf25d0763a273a69df51b57980d87cb5b1d636e91ed3ce3a42d5c61f8090. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G1309387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80b8ede2f25e6cab2a1904b2ef90136419ffa5b665ab4d4f094d6f742cc8d5f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1309391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b494769fe1d3fa8ddda85959f81e1e43a1e045cd560c7d9eb90eb5bf7d3b1a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES71G1309392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbab77e78426f9d21065b2f36e204922cf875c5735ecab19e7c1652e31b4c235. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1309393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8605eb1b1fac02539cf7354b39e117a58c6c58fa0cac7403d40e7e44cbe1a9c1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES71G1309394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d4972d31472d53889e1102abf604f6d245e394b1044882bac13a0f7d14d74a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1309397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62b3c762e491913d6a5584d43c8468d68df9db4f257bbef5b02c4583dbb8a2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1309398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0a00903eb57d47288d639063862539edf54068b3c5fee1af6e287c58052ea0. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/ES71G1309399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761e2b2f55debe8481d167db233bb63cf1abf1dcb20dc135bee59ef9e080b4df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2024762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5f7deeca35900c371e15c77edf8b973f64cdce20c20e7573bb9c754974c72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA012024282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d1b60eccbeab8495765a9a17274c14e8c84ccccd30023d0fe8f3da8a383d0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:21:55Z), 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/ES71G1309389.
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 0x436a5c5be7d95135b5b6402bec7060a55db6049fcc43e71749ec69127609da5d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES71G1309385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9e5945b75ab36981f1e74af71788d9013024636a35355562885ddce07e078. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ES71G1309388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c18f39687b6278af95b0e0e246599a4a59c8d316e23a362318d863551a84147. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES71G1309390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c9caadfe869526981776303ced76c1074cab68500121e8ae9bc8b3e9f8719. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES71G1309395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3758968373a485d788ced0129133aec3fd43ea694407d6310b70988d9374f0ed. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES71G1309396.