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 0x5d56d06facc31424d825b15aa7f05f8b376c9192f33a36c3d772cc0084aaf443. 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/f19f9717-8adf-404a-b655-ca55b5d8b322.json and https://artists.proofprofile.net/proofs/artist/f19f9717-8adf-404a-b655-ca55b5d8b322.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 0x96620bfb0ddc66e91cc26078aa77f7b7c7bc2ab9696ab21b6de2376c141ba473. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEN2291793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1abb81b68a76ed30ad935c890c3e90e8943dbdb0718e01968067c765623dc58. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHN52358297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1979dfa1fb96e8dd0a7a2a3a4ed573970a1d27326946fb9dffe8a2940219992f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN32381556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1979dfa1fb96e8dd0a7a2a3a4ed573970a1d27326946fb9dffe8a2940219992f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHN32381556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b8fd333a4ae606f965cc653fb95da1249085b57a1f5651672a89ea0a941adc. 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/QZMEM2325378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60e6d356b6267c8fd88c8143add3d81e220fde5b526c2ed493fff1db77c948e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZJG52436946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9784401240454d1f287e7a1a69db02e1761ffff51e9360ea919ea9f69ef28b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZJG52421545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa030184ffdf847b973e51ad3f4d7975cd6a14560b838d95e28f4cb9b2d4adb32. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZL382496101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de29199bb05ce4051c304fa68dcad777436088ce2c3142a13ef03dcab2bb78. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEV2441236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb5b48fcea231568a18467bcf660e060714d5cc2af7b394aea46929c5565190. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:22:07Z), 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/QZMEV2544846.