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 0x4e6f19810fa2b98f3bdb45f3d6d30bb81096ede5a737ffc0863deb92ddd3b075. 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/a01709be-ae01-4c0e-b390-618781de6990.json and https://artists.proofprofile.net/proofs/artist/a01709be-ae01-4c0e-b390-618781de6990.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 0x0908fe7c82ea84a1660c5fa3138e2d9bb5e7207b94ff2117fb948ad41fa4ccbf. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USDY41750516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329ec5f45147826ce05c747ccc27aebae5f37ee781502f445f3291704233601f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM91765443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc6ef786aea95d9962e75c58b531750a986ac9827e23a64c2525e212289e1d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM81889561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eeaa1ce3e0b0f5aebb72d2536d2f842da3ed7d08a17a1dbf788b9d8423a890. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USCGJ1808684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb074534310561706389d55e65072ab13bd5a7ab63b7853cefe93f3c57d45d9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USCGJ1882539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d552af1a53b0437ed6dd65ed5dbd3d214d2bb5569183e6b63d1634e8b864e3e. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/FRS182050164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f25c5437da24db54155be08f8b1ce3d4f9e4fe3d55fad1db66af2b6549c48d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USCGJ2106301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1af42ad4efffe811b3ea9db5310ea197cc05969fb8a089455b8063b4fa1330e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM22274013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf77a14a5a2b2c600b42a453084cba94d1b38f29ddd82ed7e3a8bf3e172628b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USDY42405388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e689b73c97a339b829ede29ecc80aa251a10a809fa856550301a19c5a8cc9e4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USDY42352107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0586478cebf871a16e07e9bddcd87de9384c738999b5ebe751c951121faf0fc1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USX9P2362816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671cdbada0a106c971facbbdabc91b8a25c7e6cd1197284b1412600d7f18aae4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USX9P2362819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83554f531562445368a4005f97b62a933f4779ee031cc6cf8e45492bf818e6cf. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USY282312993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f7427fd96dbf42aad9cb09c490ef75beff7b8a641eda0908228b6e1d97abe4. 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/USY282312995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac49f56e32b9f119e1d53d2b16d2aadb974f4fe0ac5f64d9841e48c7cfd8f01. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USY282312996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5555c3e7d198bf6f2d09ed36f94544cefd7d508f74ce637564638a6287c1fe. 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/USDY42561392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f18f6f38c5947725e5c5e3a4ab33f8e44842ffe163afb2118bc0097b24d3a58. 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/USDY42561394.