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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbea815750e506896be47e14bb0badacc389f7ca962c24c766cd0f2674de3910. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e965db7b-0607-44ae-b6b0-dd1210bbbcba.json and https://artists.proofprofile.net/proofs/artist/e965db7b-0607-44ae-b6b0-dd1210bbbcba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handel: Theodora, HWV 68, Act 1: Air. "Bane of virtue, nurse of passions" (Irene)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6616f280d639bb1a6e5df3358ac8775b77305139304cc9d13b28b77414c48e3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRZ200310017.
Handel: Theodora, HWV 68, Act 1: Air. "As with rosy steps" (Irene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857d6e1a886cdd673bb11ab15dba95b724abc84b1830616b1d0539076f22a9e3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ200310020.
Handel: Theodora, HWV 68, Act 2: Air. "Defend her, Heav'n" (Irene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6e11d7f6eed4cd4f9571fa28091fdd172dc1e9ef1baac90e0f6acac166a9c8. 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/FRZ200310047.
Handel: Theodora, HWV 68, Act 1: Recitative. "Fly, my brethren!" - Recitative. "Ah! wither should we fly?" (Messenger, Irene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725cbacc2fd72d4ad506d360f98fefc34345157c971e98b990f2f31681a1b180. 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/FRZ200310019.
Handel: Theodora, HWV 68, Act 1: Recitative. "Unhappy, happy crew!" (Didymus, Irene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ab719672ec1f9253afcd31ea3ab1423f7cd1bea90c8fda40bab9e53fbd0162. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZ200310027.