Richard Birdsall (1799 – 21 January 1852) was a British-born Upper Canadian land surveyor, land agent, politician, justice of the peace, and militia officer. Born in rural Yorkshire, England, he emigr
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 0xc76dd8044eca2b798909cb9c14936af129c0a735aa23d0038329bf23fc5d08df. 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/e063fce3-86c6-44be-b607-188f66315b46.json and https://artists.proofprofile.net/proofs/artist/e063fce3-86c6-44be-b607-188f66315b46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Total War: Three Kingdoms (Original Soundtrack) [Deluxe Edition]
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 0x2648f27e35a44d19df36765ac38d4b235ac008e23e5b612053b25438d8fe776d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2099780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49761f504fa1653ced20b8ec19ec2087b0a90bba65ee9461881901a101ba440c. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USCGH2099785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605af753c067fdb0162782790e5be3c7948784b7c82301256c10c9673087d8cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH2099788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132df0fca3ad7f208057138cbbf38962fccf2ba6fe1db97ff7d14263dd8d7b91. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USCGH2099796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda36f24b76da9e9abe02eae6ec6dfed0b7425c233f3506b0f3899f6f1082d26. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USCGH2099798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e09c7e852d73ba8d0372bdcd8629565dacdd332a1273cb22e1c6729ea152cfc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USL4R2054478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a66e99b5da512a27fa9c1392fcf225b2cfa4f812bbf27f2a7cd80dcd56d16b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4R2054483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9c6bfc70438132632219ae1fd5f64abccc859a537a6be6a724ce802fb1a6c8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH2099809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926eeca15cf67e288ce90e6b26d9c30e7eb312378038a891db6e261c1cfec319. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4R2054491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49761f504fa1653ced20b8ec19ec2087b0a90bba65ee9461881901a101ba440c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2099785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605af753c067fdb0162782790e5be3c7948784b7c82301256c10c9673087d8cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2099788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132df0fca3ad7f208057138cbbf38962fccf2ba6fe1db97ff7d14263dd8d7b91. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2099796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda36f24b76da9e9abe02eae6ec6dfed0b7425c233f3506b0f3899f6f1082d26. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USCGH2099798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9c6bfc70438132632219ae1fd5f64abccc859a537a6be6a724ce802fb1a6c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2099809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23387fc1a89b1109f62cc0b699523e8e50dc71d58f88fa44a0607e4c864bfa9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82489025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce3015b9323d1eee54e91a6b55cfff95915e42552c18dff1f2c33e2c2cec50. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM82489027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40801e42ea31781a61ee4a855d740886721aaa2ad7d73c4217dac1310aeb8138. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82489031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf574770e3ce21d94165a2db4d596fe65033f95e7a05aa4a42567f25abe64fdeb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM82489054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945b464ab555dcb4e152581ffab9807d31ab9fb171acb253fd70cd846c73a204. 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/USHM82489055.