Heriot, from Old English heregeat ("war-gear"), was originally a death-duty in late Anglo-Saxon England, which required that at death, a nobleman provided to his king a given set of military equipment
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 0xc36304edc7fd8b1cb873e04d34304457e065cd5127f9eaa94fe1b6bae6093428. 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/8c753e77-24d4-4ef0-9861-959830b1b439.json and https://artists.proofprofile.net/proofs/artist/8c753e77-24d4-4ef0-9861-959830b1b439.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 0x3b1d254439c584c0d2765b13d0612c647e56bdbd201ab7cf53e94c22e1c4b250. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAFC2040088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b085081a9e9f180cc6a6106ba29f5f547b5903f4eb134ada0a633acafb179fa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAFI2158500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bda47b6c76bb26ab7ca9536a533abbca37615aeb482c1e1be834b18f9a0669a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FRX762137852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b125dbb2b627d2b2d4807f324711f7d3eb4ac21d21ce5231ce63ac754f514cd. 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/GX34M2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d3f86dbe4eabdbea7abd0d4ff25cbaf908c145fb005c65d4775d8894e15ac3. 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/GX34M2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b749fe6f1cff46547cda31c4b939c22010f083fe8422e0a2d090672c2f50a95. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GX34M2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ec078fdf749d0db49627095fad034ff31fdbbcdc005a63066cff0a1b9a75fa. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX34M2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f00028de22420ec24945ab92062b33c253b82c8c62ae45c99f91a04901da69. 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/GX34M2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3700abf88046a79a39d9de3d72484244f455756332bcc24678f057eb7bf2f4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBDHC2444301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7349db690405c4c6a9002b1bb8147073fa650aa079906e12cc571fc0faa9e9c6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GBDHC2444302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778fb5a0590e12fa7ae156db566e8c5d69c1f668e32b9cfd05ca8f795d59a0e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBDHC2444309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd072148c084f108fd1d3c5a163ccf2a6932f1a89745802c9827db629a15865c5. 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/DED832400493.