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 0x6bcfa0eaadb628735b7970095cd0ffc99ce0956128f5bfc4dcdb4eb9fdd43749. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5327027d-7f8a-4237-bf30-9ce6e64c3e93.json and https://artists.proofprofile.net/proofs/artist/5327027d-7f8a-4237-bf30-9ce6e64c3e93.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 0x4870ea3b4aecb5d9162820d3a66c4b376cb958b296efade85dc08209779eb913. 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/USDHM1216267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11dfc9398822b541b8d058ff6e361587f5794ca912ff78b8bcfbc84a6f6c314. 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/USDHM1216268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09d8b1e6c858fc272d368f3eae15afcae3d72aa7150b61c2b6b6f44cddb9698. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDHM1216272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837c38722199094d70df0bf4fd0f676b496daf544bf7e80a641b57d47aa281b. 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/USDHM1216273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eb70d65e218a02fadc6ae44ef29597a9a6bb28e456f8829918854b806edef3. 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/USDHM1216275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf421b940a271a7ddabc28d6d2afd1de25e8dcd96347631e9bdfce730d40ec962. 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/USDHM1216276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94dedb3943f7f6fc6fdd1f411fc325f366f75e64164b28b9f5c7bcf1d41aad. 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/USDHM1216274.
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 0xac3231095307e6c5fabfbe1149410a648acf3debdc37f19e78781ea78875540f. 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/BXAPH2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd018e4f3a2ee4aac242ce128a0bf9ad959043363a8229c1b377dff8a324572d1. 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/BXAPH2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05b9d0318ac66983791c00506cf79122f84a8c1282f4ee8ec3ed594c21761ce. 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/BXAPH2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7cb87218ce9bfc834de192ccc5ac791cce9fa3cb66f5b67113f4878e97b1e4. 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/BXAPH2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf031de5cbf06565d1ee60bbc34cf1d64935f21d8bd47a369809862385e219b3. 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/BXAPH2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72e8e45c6b86acc73ab0d066640370c59992228061350ba983dbf4255cf09b3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXAPH2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1138ac0f7b03bfdc103a4a9167b7cbf0ee86f3f0610f80b24ddb4004795e380. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/BXAPH2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c3450517a85262d76479b93b058b77c35d2fbac60818bd14276f8fed3cc2b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BXAPH2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79778eff574930d7417bdf50e6941ea8442f17edca44bd57a95ecb0c1eae5027. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BXAPH2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc366df5f1a49ff5484e35c1bae18e1b498f911dfb20a208606dad2a3a9ebcc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXAPH2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23e33aba94df3d06984a4afece6abc0a2c689b1951192dedf430ebf803bd6a5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BXAPH2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b32224892b5024ad5483869fec7ea1c0c1d62d217aae486c13615d0c77aa279. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDHM1008845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75293ba390350fd9442cf8cdd001ffd5acace0f76487d0eb9d85fc1c16674577. 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/USDHM1008846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16101b75f5f20d9e72bdb04c318298b8a1ab9c6c28743ca7ef7a620b2e50eaaa. 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/USDHM1008847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf93fc18f7d1b59795a8012d9c3cab2fa1220564546b7433a6558d711becc72b. 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/USDHM1008848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8130197a8b4a6cdb59a58119256219b3d63a2683efea8881d06b283e6d3cab. 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/USDHM1008849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9bebaa7e26bf90192a91244fc38780874ffdfb8535a89b815105702d0847f1. 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/USDHM1008850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa471e184272775f7f553237cfdb17cabf177e6a5dbc9a0364dd283ba7d00fd92. 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/USDHM1008852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5802e1cf25cdc05d8b11388a5137453a43c1e38aa40290011e5e0529f47c5f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USDHM1008844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf480be3b196c261393ec744cf60979ef41de920d02c69b23672d97cd50e0d205. 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/USDHM1008860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550759b2e825e1d650e9a69ed20c15117aaff101fdbc363de976978fd928844. 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/USDHM1008861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8b38427a2a52e8ff2a797c5018f631cfee0d67fe3df887699374f24eeb3efe. 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/USDHM1008862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b5d2eaf50352dc07ecc06f1b7b93c43530111137982f3768f862bf48f93ad0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDHM1008857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773a3710100b070cf7a2ab5bdc2f47e4c1b7c46a84afe3ec0dd105dc6b7b153e. 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/USDHM1008859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdc0e7c27698e30b193e385ef3b5d365c7c07d06612087ca38a7af545e389b1. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USDHM1008863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91556b85033863686f9b0800715afb7b0cdd8bc6e35660d419247ff952fba39f. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USDHM1008864.