Spitfire Ace is a combat flight simulator video game created and published by MicroProse in 1982 shortly after it was founded. It was one of the first video games designed and programmed by Sid Meier,
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9846441ed6ee4ce0212500b705365b28316122653689ce8c9dea43583fd7f23f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/695322f4-3f85-4cca-8df2-5eab567a306a.json and https://artists.proofprofile.net/proofs/artist/695322f4-3f85-4cca-8df2-5eab567a306a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb3d8562dc5e15422f389e687fa046ab74ca729e3a1e5c7e3cef92d10c0fa6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX3Q92550503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a98c10ccf9e71b25508ae42a3646c4adeb990522edbd76bad771dc2374af91. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX3Q92550504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4aa35cdce7cd46811c51ee5e4952c1803e6dde1863e7de4dda28f3ce1d1f0c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX3Q92550505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c1667c5d456fd81e394bb49978241e70271e6f0c9e42cd1740543bad9c2481. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3Q92550506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333370844947da18af561b931dad7705b330a218789b2a1f2fed0be8bc1f3a69. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX3Q92550507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef4b66b73f9d48cdc59860169e838c2cdea6fb7b0b4ced24cefc6939396a24. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GX3Q92550508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd542b9155d79f8ea774618e41cdf83c9a6347e007ad8f9204ff75da3c9064681. 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/GX3Q92550509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe88d2faee9849529920705cab1ffde4c5e540fda099d9bc113a28117f15ec9d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GX3Q92550510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f343ab59d66e92fe4a37e91d51c0f6b06909ab1f6771a924f476ec77f08821. 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/GX3Q92550511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1ae958512ee75b5fba85e6eb22b2b4359b7350a36d48251afaa38b8c3387c9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92550512.