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 0x8f29cbaa55bb9bf6494fc32e86dc5aa546d2d76b245ad9d46274d6ec3ed0cab7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19980afa-4758-438a-91b9-1c5693900bfa.json and https://artists.proofprofile.net/proofs/artist/19980afa-4758-438a-91b9-1c5693900bfa.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 0xef16a8bf7b9006628bcec1caa0645cc8491d2dfe6a5b1bad5b751dd2ae5a7318. 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/FR2X42411046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd2042d7208f947726d506b4447220d76558feb8b4fbfde2775e868fdfbcf7e. 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/DGA0H2312721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8090028da34241cdc3f6c1ff88dff1d780dbf8a5b13e46d08ade166c542c6f71. 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/DGA062379197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284c67d364a851db1bfb6c37f7ce06a90c6139bd059f76f740f8947ef664cb25. 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/INB942300748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f85cada48380f67752dd93722a99db30949d3c29f2cc8a9902379ebbc2e857a. 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/FRX202209137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a6bd985e6a1481d2d3190b363cb46ee810569c1d274c3382e560d1d304dac7. 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/FR96X2286093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362f4e4f3c5c8339d811e5f98fd7e772bafea89b9bebf2b6e61c09ae805b895b. 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/FR2X42259756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d805880e5f7d062946b3baf5a3f584811b36bfc019b3fe2f1b5b41e6d0613. 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/QM4TW2168450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b927a9f297a094bfc0838ea7095429294c106201ff136bc3de24a18e30591e3. 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/FRX202033094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5088183ef7b0e2ebb093e8d0eade84a6d67b3d1ca775f397899918b42a5d7c. 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/FR10S2053344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9270c05ff84caa7751b91a591b701dec5032d1eddad68572cbf346ae4df5f37. 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/QZDA81926928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8cd1497de99a85e2d3296d4f325ab465b7400222246a510aea4dc6169879b7. 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/QZDA71944269.