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 0x1eee8fecbca5d27c220024d307eac82d50553cfa5b397f7a1e9695faa9a69bd3. 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/bef30c3f-d9fc-4bb0-ae76-3cd841adfd00.json and https://artists.proofprofile.net/proofs/artist/bef30c3f-d9fc-4bb0-ae76-3cd841adfd00.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 0xb2eac8cc6f4911415bb03e48d78218e8dbce7ee63eb93de834d5c702b749bf79. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DKMFA2200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73c8a5cd56597cc2f52eadd00ea400f389f8fbeacb4cda41402057b3dfb71c7. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/DKMFA2200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa050b192a09c452f4df5be29389d14093a04935513c8f927e7498e1875c2ca05. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DKMFA2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93a4c07a373e656f783084af86bae66eab6f85f27027c9eeedf8ee23e17c5bc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:58:43Z), 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/DKMFA2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f01d7b687feae2e50b9bbd3d5116c43302d17f48a0682fcc00867fd7d5b52c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKMFA2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7785573a491ae09f7ade0fe3faa0097f939e0f72d1d525cd217d61a479ca3816. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DKMFA2400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff9af7e105a0826190cda1b8cff52e5fbc5f365bf255bbf01984f380de2eea2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DKMFA2400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c776884192fa1e3e8dc056cdd55659d727c6a02ba0f1c554252642498494732. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DKMFA2400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f451b65357d82be8cd40e9d576baeb660b31921d4fb1b0697507b914f17a3c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKMFA2400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7b50ea921bd629954eec9258d0f716360474f3dd12dcb2fa600b6797796c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKMFA2400906.