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 0x14a9b8f5859f34ba2c79d51ba4996436093c324dfa312f87cadf8ef23fb4e18f. Chain 2 (Bitcoin): anchored in block 953844 (2026-06-15T22:28:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/005ced57-b998-4bcc-b696-3611b5171710.json and https://artists.proofprofile.net/proofs/artist/005ced57-b998-4bcc-b696-3611b5171710.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 0x22e1bf1d2c8456d88da80ce725d3c4883f28eeed1ef9c9b582dc6d0f071f12eb. 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/ES5339005859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3be98925a62c1456d2ddb49cf91274546a7354de06b520c1ce57e67d42a240. 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/ES5338310675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4764bccae61c52b702f3a724a860dbca397970e18cbfacd3273313c3eaaaba7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES5338310686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14340bee53cf8474178e3c78d15297f20995b5052fa263d018d4c8f59b24d77. 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/ES5339600741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb49c2717ad920c8a13c35aea40d526111668e05cdc95e9a02ebf33abbc11c7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5339300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0700e7c6b68402270b4c27c105fd5bdc6772fe938b07bf09035b951513f14f00. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES5338208688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd9077fed663e88e2ad5197f0e74f6e0a6d4db1abff1b0982f03cac200762b2. 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/ES5331410687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b619d88519b87b07e71131bcd204c2bc4e994b7dbaac6b789de27cddb01935e. 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/QM7281749849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d43bdba4200f121a4445ad9a0b256c46c44654331a2ffe3cf70aed1196dac3. 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/QM7281749854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e4d282111d1e828d39e8ad0e7717fea87decbc2586ba92290e9c2d86d5ce72. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM7281749871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe625e1f17d8371f455402c7764b213c982fe3535cabdb2e71afa560f72b707. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM7281749881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1930760d6a837f978c82e3e9da8186b35ca342a5e548debd101f46259c714c. 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/QM7281749955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde32b803e5dc71bf3c99d4a8f5e0acd94193cf99cb2afd94ca21fb0cc08818b7. 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/QM7281749982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaea38df9002704467a6a68d68f592aed6c09ac889525d54338096f4b120928. 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/ES31E2102565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1700f354c7ce74533d3e293ca50b5c84874f2b46a479dcc82461428f29195acb. 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/ES31E2101561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c439e34d55138e063fdb2e8ae1864d2d1b6edc37d73a903946d419f88b8277c. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ES31E2200545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e82fae314ba5cbe325a14aca67fa2742e75dc66155fdecaac79ddf5f0e2d3e. 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/ES31E2200546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475e953eacd39efa965ab528d1f5ea379a06e4424c488faca4778fe4473d4d5c. 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/ES31E2200547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77ae33572c80d16e9aa2f6cb90153cd2ad4fa87a2e6571d8ef304ee5b58c92d. 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/ES31E2200548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd907ea2941281175a3faa424190a9ee5fc2515e40b355d6ac3896c1048bf20e8. 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/ES31E2200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e46193d975f9173b11e330278c484cbc59a66b9527ac964e47fd73ec54400a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES31E2200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b98916a7ae96fd1d7a8fec3f69c3a64b2f5bbf4d54582e4cfe1b0be66e65d55. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES31E2200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3641cf2d6d263d0f668fdb117ac4bade3471a34c3b760fc233a7bcbe7f41620. 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/ES31E2200551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe211079e1c1118df6df61af18e045cb8ee532121ee1146e0ec5eaa747020048f. 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/ES6069708001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef0008d3daa6caa1281014e83452b84357db6d5e0673b357a02c4628ae9ed0. 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/ES6069708002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60da499f7c63a7685af0476b43e93c18ab86c4e12d0f44c306ebda87047a5e12. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES6069708003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde056a5dff3cab917c8dde962afeb78d1a1c7a8910a269edb7a6a460fd8f3e5. 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/ES6069708004.