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 0x0e17e98fc3f2a4060cb9f3b0849cb2bb47832874fb6c007ffa35c7697ca3c4f1. 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/4d885000-4a27-4d32-a5c4-92cbf10851be.json and https://artists.proofprofile.net/proofs/artist/4d885000-4a27-4d32-a5c4-92cbf10851be.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 0x3c8c2ac60d48ce0e160ad19d72e216bb3465f146befe078b7126161eec9ae397. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR7ED2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928fa961a93a722874df5a7da3ae794919f28dfe77131f7c245f0fec2d37ff96. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:27:47Z), 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/FR7ED2200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd13382aafec59f9edac5eba6bd92e99d18a40ab8953bd2c74b69b3328d3cc4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR7ED2200670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea1480c70ceb915c02173b2a9dda61d4046581f9fa122ac2d0d6b64b011207. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR7ED2200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a81e4afdb59cbebf457fd1d73935c5a88d1dca876112c05747509fb2fae95a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR7ED2200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc959f141ac1e658fe0be69dc91b9ef15096e854590dd2fe17a6b80712567a593. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR7ED2200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef57574a9b664f51fd301e4d263a4451927c8cc70df2931a7f144b59af2b9ca. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPLS2507689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2264a29df0b46f245ad610b3cda576e063ea1fc8841aa63f5bb561eebadc46c8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FXQ892300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7990818e34f4a40e6a9af511f09cfc7f7aee73a2692e16635dbc9631a6a3d16. 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/FR59R2158935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2264a29df0b46f245ad610b3cda576e063ea1fc8841aa63f5bb561eebadc46c8. 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/FXQ892300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d1731983ad2593929703bf488eadc2785ef3e75550f9583ce1e9e797c3ea8c. 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/FR9W11823130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7648343a5d72d7b969ceb686c0eec791c793618b34b4fbaa9c44a911127166. 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/QZK6G2319039.