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 0xdaa57c24ff10349877e4a576115c9be3304cf858737eb326979cdf873509e66d. 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/f8a87866-f303-4cde-9ad0-36a6f5fc68fd.json and https://artists.proofprofile.net/proofs/artist/f8a87866-f303-4cde-9ad0-36a6f5fc68fd.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 0x287bff1f5c7004393694f32b8aab22572a31c34afc1261eaad321b4f9f733d94. 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/QZWV32395795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195d8342b6f5d54b478a7acdb9cc283c64bd33a03f99fb5bf38b7c9880f5b141. 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/BK4DA2410832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07061a90911876431768af4a521285c029b8435d82433ceadf168812ceb72c. 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/QZMR82200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0530c012712b952be9d0dd89e54a911a700f87337996e5c6d5ddf8de98e0f455. 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/QZMR82200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0356b0bd70e7bbfae406b9c725fd033c5ce699852d23d768e6b29381e92cfb78. 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/QZWV32386795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c411df4fbebad80b1bcfd96850429a710cb1eb051272b2268e08aff17d8141. 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/USLZJ1982534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a227e5227a3bd0cf520f35d4d96721e97882058a1faa03aa60d618cec401b0. 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/QZMR82200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09be9d2d2012bdfd2b2e4bdd38035305778fd5eee3c1c94e50b3b9bd98e1f5f3. 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/QZMR82200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc169a41ff907bc1b1382db397f9fde588c1d2be41e7dee9364b6bb42310f497b. 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/QZMR82200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0de7b10e2eb4bd3980e70949956f7591569a1385152eb14bf3e5cfb650c1f7. 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/QZMR82200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d90ca60b19215782069c9097f1e17d91ede305d32e362a18f4b12e72326892. 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/QZTAS2253083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434c2300091a08c01aaf41545bb27d90ff64aba686a030dea0faa954ae01d397. 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/QZTRX2200594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92efad5296a59fc13c39cb4a11f6923f8984bd32af2b575f5413d2dbcf15bb2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZL432200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a60d0348cbf39562624fff4be0a5679cdf61824b51135fcaf6e2e6d93b570. 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/GBRKQ2271446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b61a8698449a7dae10fc4352cee6721474eb3ab06608d3f8294b9f596df511. 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/QZQAY2550879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132dc6e42abf572ccfc61df81a6449a49abf940adf09161ec6d1724afd831212. 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/GBWUL2043913.