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 0x067e6cce65cdfc59ca5f236d3561e753f6860704f2e93ecc102c5caffb4ccaba. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d0178fc-efdb-4b7e-90d1-809efc17913d.json and https://artists.proofprofile.net/proofs/artist/3d0178fc-efdb-4b7e-90d1-809efc17913d.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 0x039649319fb594161bfab51d7b63fa207af44caaf233e6d9e1cb051b317c7f47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR33T2267601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4120fbb87c9b3b50189d057cf809a57d00334beb477fcfbdd3c984679f9760a7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR33T2267602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd020c919e15a30a3bea57dafd5732387843eed29779b23612e90e37ad2c89039. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR33T2267603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293397b579323a84c8ff8f70368668157bf7eef845d437b8608d13511239ea97. 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/FR33T2267604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e098d027e89e8c7658517d14b7627c47f34362ec0b8d5f522c3418949358c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR33T2267605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d819f59701428c083be2ac6ef6584db0701bb3ef15b2f7b0d047cd258edb95b. 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/FR33T2267606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd9025357511eda018be94730a499a63833b6b62069924e8442bee1b5ca856b. 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/FR33T2267607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a971e2eff8aea545495a1ff5c54d27211e44384636d121befb23b6c34e21a1d. 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/FR33T2267608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f613e286f41255f6fb092eedc8c226db05e89ee6076c0eee4baeb4a0e73cc2. 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/FR33T2267609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d819f59701428c083be2ac6ef6584db0701bb3ef15b2f7b0d047cd258edb95b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR33T2267606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4120fbb87c9b3b50189d057cf809a57d00334beb477fcfbdd3c984679f9760a7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR33T2267602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01501f055a5186b208364e9210c05282775f4b207a9feb7fdc2672ea2152162b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DENW81400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf759bd4ebf4e4797372b26d9f14df0cad243f2a9b92ab7ba1167db9db9cdfd2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DENW81400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd01545943544f8615511650ae7982e1190bca2fd42e77a1e7a500327ccc221b. 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/DENW81400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fc0f01c21b2d200ce41f0fcae5c509c1baf7433f18aa5bf6aff681a28ca5e1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DENW81400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23515123df56a06e2cb2da8b7d49c456911a6165ce77ee11bdee68c407e095e9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DENW81400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bfd40ae44ad23a424f762125ce414600a154c4270b308ad1e28126d7b65506. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DENW81400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c9d0029f0bd6dc7fdb53404d066868463a2ddf7792c24289f61bf9c0a850c8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DENW81400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828ed02c552eb649d9c3ee6cee2feb1cb77469813d3835c466d8d269b1b450b. 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/DENW81400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c409e55b38d9db6d354af6e091702c7251d94df40f4de66f0df4cf96ee1196. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DENW81400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e516360a79dd0111d6c17baba284edbd67b66e538f029267996fc7a550cefe4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DENW81400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f052eadc9b7961e3b4973b8f78601260874944d0426d1f709bfd9c818161bc4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DENW81400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520ba88db490fdba2c51efdfc67f0df4f6602031c5e69d83b2babda8d6cdfcd1. 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/DENW81400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc5fededb40604c491a6abb089148a0fb16a4ba20d70a4aea720d47facb820. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DENW81400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57bacef221a4db6d97cee956653aaaa5e21198ab351d669299d939fb85b9907. 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/DENW81400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0edf40f54168180b4a68ac3b15f054b81e9146621235f0b0e8b687479c9a459. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DENW81400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c99779e86cb69a9203a935d4fc50ec18f5f52ce6672010b5c7439d1658d3d7d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DENW81400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2346a030ebed36284912d4598645479fe0a66f956db69155e4b6669ff8390. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DENW81400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4163cd1d296df821de40c3899bce5a401bede99af7beb54677ea077d5073f7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DENW81400034.