David or Dave Ferguson may refer to: David Ferguson (reformer) (died 1598), Scottish religious reformer David Ferguson (Australian politician) (1844–1891) David Ferguson (geologist) (c. 1857–1936), Sc
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 0x69938f361ec660b1f8a2f09658734563f59f46b21cd931c8602b68fcba92e96d. 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/197e001b-d195-41c6-981c-85e0f62d2ccc.json and https://artists.proofprofile.net/proofs/artist/197e001b-d195-41c6-981c-85e0f62d2ccc.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 0x2a43ff4cad66c421d3fed5e8577e875a5f9315d6556299164c18b6fde0c82a10. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEUM71200494.
Red Dead Redemption 2 - House Building Theme
The Music of Red Dead Redemption 2: The Housebuilding EP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deb2f35ec2adb0db15cfc0989e795b54b5dc0be115d354181aabd58972d93a5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USFP72178202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05e60447447329932ab2e01ea2747f6b4ffada60eb459f9c1afdfe743ae8eaf. 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/USFP72178206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5347d866fdcaaf96813c24901a9bf232e2c367bf001475aef8ecf678900b57e0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USFP72178210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50315cb2adf3647474735ac297d5f837eef9e490d3f9fc6926ea63d1966438de. 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/QMDA72166220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd559c527865efeb82f3c1e9c4266643f18e0040664803b4a77d263383b462ed0. 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/QZFYX2448061.
The Longer The Waiting (The Sweeter The Kiss)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfdc4c3448953c49d6425f6c8af6138dfddb477cd9a454bc21d5cd3ff8a694d. 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/SEWKN1100102.