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 0xad98a93e80590b93137c0ad911e95e89aa7de22b910eaefabfbd2acd5f0f4f1b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/842f8e3a-45e9-437d-b2fd-1a09868195d9.json and https://artists.proofprofile.net/proofs/artist/842f8e3a-45e9-437d-b2fd-1a09868195d9.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 0x3d3f33d44e531c6c68172c3577d222450e0807fb0e46cd79f2b46292f3598f0b. 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/QZHN32405413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2c5314230d1f0185a40bb36fca366ea5060f228e06339a2e65d9bb5384cf86. 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/QZNWY2393513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b20e136c3e2e50928b917668d0a3015ca08d91914298e56643c91bbbe189da7. 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/QZMER2304826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acd9fd95195b7af1b8927e1e0b4190820a1554d9739786afced26f280897fb8. 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/QZFYX2369492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46051087a3f741197e350303e829c3070111795419e0478ea63777ac201b3d64. 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/QZK6K2235675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c566e8cbf46991667d2076055e6abee3d5cbd39a831282d50071bc881981f1. 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/TCAFL2122337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78db88f2313fd65fd9d40ae983861fa100ce35834126366b2f65714a81161bcc. 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/TCAFD2063286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b3d38a3458963f6d211247c453a98b4f38079b8223ea1f8daae39b2ebd767f. 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/QZES92080963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3bbbf5a2e33a544f82596423e29fb67d6324e0984aada753cc86a06b2cb6ef. 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/QZES71918639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde965ec20691c48f1f54c5a06739d9a280f458b212eef787b24ba8a9e0c8454. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ61922238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b978a06d103a0e5b2502f76c4aaa0ea74cf29871a24df84e1f0a90e8262e78. 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/QZDA51948014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070ca52c5391644f2e4feb8a6a4e63e3c5b79719fc75447fb0090bf7af86af5a. 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/QZES71907627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb798a14744c7b8073ed9e12e144a2b389d53dfc7affea91aad8f4c8991e518. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN51972423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1369cc5385c937360ab73e1e4682a0dd508644dc6dc8d795abaa0949de732b. 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/QZHN32081968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b2764ccf0e3ab942a94fd7d675bd10fe3d9a55349b48c9cea9d0a174971b5d. 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/QZF8N2044205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30a2161b3ebaf9fcdff74ffb7a87e64000d4f2867265f3568fe8971aec23b27. 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/QZFZ22014172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d1193e860dad17140b18b811c639170a6e2e3538e66cc49849a30814f68831. 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/QZHN71982265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96cd142a639b65a1914a31c8ff79b23f17f23023db7d43bdda0f457e8f6a5a0. 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/QM8DG2006764.