thumb|Quadrotor helicopter Baykar Cezeri at Teknofest 2019. Teknofest, short for Teknofest Aerospace and Technology Festival, is the largest aviation, aerospace, and technology festival in the world,
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 0x2813cc9802ad4eda96ed2c38424bccdaa8d7e860eeeeb96154e20682f2186309. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d85d516b-04b9-49f2-9a76-10e3652dc63c.json and https://artists.proofprofile.net/proofs/artist/d85d516b-04b9-49f2-9a76-10e3652dc63c.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 0x988f45dc2c944d1eace5ae583a891b86d24098fc2d7f1fbdc6c1571c17120e66. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6J2321768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6eeabc32eb66c76674e1dc9f8d324c794b92b54678daf8a9fe2be179eb0d6. 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/QZK6J2321770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a5c0816042e4e1de754f0c65083c051321307fba9bfa051270249261fe92e6. 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/QZFYX2430431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1c95e08be220219784642e37fa368146cede25cfd011ec3006a5eb7bb18ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA52409584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f35cdb28a19b4ac72f2e287f114659d27c12a674a8acd7128b1a550014a40d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:26Z), 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/QZWFQ2448404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f831cdd0b3025d123dee3716ac7493d791bf09ed0d4b12b4fe7c81a9776e9f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QT3EY2449496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ee03e828ccacd8827d8f728abed9472a9eab762ddeba98f3a8a54bfb0b71d2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWV2509126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c72fa1f1e1d06ac43961089ee3effeb09eea7c752142da9bba4a5d2ee1894e. 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/QT3F22569955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb2d10357fd730fd0fc94daba24a6d415cc09f677afa659bda13b84e6598bb8. 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/QT3F22561199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e3b4e1a9abc31fe575bec061e04575fca072bd0f2ff923388864260f3a970b. 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/QT3F22562559.