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 0xa15fe21ad1806a14ce724f035af7fc370331639aedcb4731d696afc34ec00b43. 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/e1c541cd-102e-40fa-9ba6-9fcb922ae0ab.json and https://artists.proofprofile.net/proofs/artist/e1c541cd-102e-40fa-9ba6-9fcb922ae0ab.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 0x42823ebddb6dc92833506ad44a6a48a69d3c284156938a7bde3e014535cc46d4. 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/DEPI82322106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e50986d1d2b4f1d4d2fec98b2d19c7d560b3dc30e3697b3bb38cdd52cb612. 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/QZWV32381671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc315742c74f408e55fee03e0e38c569d774c34dcb99f3619d7c78bfbc2c4bec5. 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/QM3DF2265509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3813f42daa3c411d5e5f24088d5b1284abaa33b07d2c57fa173af6f56a2dd071. 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/DEPI82319922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed192de62ded50cafd01d5492ba40ddc869c03472d75b085590dbd4cb57c7944. 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/CHF032402534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27a75f7d698046bf1e8c84a6759253719f7cfc7504b3f5349c70e9836a3bbbf. 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/DEPI82222602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0503b76f2aa9a0167ddc6cf3c278a58ad8624009f215d859559b9dfe4e1135. 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/DEPI82219376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2c96641b156075011921ba7382b4e34c036b867bc079a46c0508e6d4533585. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEPI82219058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5320b8549fdee8e46fa895af2935663a7d0d8e8171f7a48b2fffaf94329134d4. 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/QMDA72203095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7ba93cc3cefafac048d3a4320afface7a849f0644c59bc6383d35e7eadf653. 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/GX5MX2289117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1068c35da80a07e5064209e6ddfcb63f87e16bd14e62363fa3d233b1ae7132a. 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/DEPI82207713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e54d6a9d02371e76ffef03707c7955fe0f42bed5331051738c2a7c88cdbcc75. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEYQ92200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610f22d0eabc2f0483ba185fe88cd3b4bbacaba02e73ef20e723d0a545096105. 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/GX4R52107810.