thumb|Jacob Peter Gowy's The Fall of Icarus (1635–1637) In Greek mythology, Icarus (; , ) was the son of the master craftsman Daedalus, the architect of the labyrinth of Crete, and his wife Naucrate.
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 0xf672ddf4d4e896edfeb17e0503c36241e6aecad34a4419886377c96126ee800a. 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/8bc28e17-738e-4e6c-9e50-6deabaa6970c.json and https://artists.proofprofile.net/proofs/artist/8bc28e17-738e-4e6c-9e50-6deabaa6970c.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 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 0xe68e2079a0762805db9b9ca6f08b635361496047971e6d5385739d08eb882aff. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEQ2269805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c6eea978b5a4bf7ed5163a2a24f9019c28a50bfc265de2ac50391038d21ca6. 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/QZFZ62407018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2901ab157745e91152b679d1671ae6f8f922dc6226c7fd5a90a9648bf2c8c511. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIB2417536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba5104cd3991eb97c1e857cd97f9a964f50c3b49f19ccb7718b09c085b51115. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB72590224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078d1cbf12c04cd68107ef3a5d6d1020cd69cc66300414195627b23f224a1829. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWT2548947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b2bf9fc6f9ffc9e54426a3972c610d20f814651f6dde15994ea4fae7b267a1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWT2548948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07d245dd613b784c5b527454406d78b185e12bcf73906b2b5ef804861acbead. 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/QZNWT2548949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f24542e41905d51176fbf6adc14069d634b076c2591fef9b51686dc65117488. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWT2548950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b27b80d5fca98bbf177c17dfc02ebdd9c58e80cfd54d74aa4da551328cd1f9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWT2548951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e905af747ae490bf9d2e49e1b7a627a45bbd959f09796f3adf143e79ffeab9e. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZTB72590225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d1e74ecc26dfd607829d1557be3099d35c60bd6e2fd88a9713bcb8be17f6e1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWT2548953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75393a217026b37c8a78dac9d6a0acbe48891b2d94ee961f44aad59eef467377. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWT2548954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e2cb1fdec2e409945c3d6441b7bcdd869cf4e59ea4cdade67b7c4ca62ff1e. 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/QZHN42503625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceff0cfd4817490cc92df1d97ac5a4f38afdf762d2d6d916eb55eb75c39fd42. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWT2548955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514379ea3ea36815c2b68841726ce2aa351274c902b1d003381bc9cecb69bff6. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTB72590226.