The ham sandwich is a type of sandwich, p. 138: "Insert slices of ham and cheese between 2 slices of buttered bread or toast. Add lettuce along with mayonnaise or mustard." with ham as a primary ingre
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 0x2bac309c3d0081add21995604392a48d1561235443a73b3ed19289107501f59c. 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/b4bd4123-0091-4a8e-993a-d0efc86452f2.json and https://artists.proofprofile.net/proofs/artist/b4bd4123-0091-4a8e-993a-d0efc86452f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
IS IT WRONG TO TRY TO PICK UP GIRLS IN A DUNGEON?
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 0x499621aebf0167782215e9ca52af1284a919a570f35338edaef0fa92e8297452. 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/QZFZ32353166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1123cc1f3622afca5a753769093f26ca3e889a4bc4cfa6841bc676edaaeece6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2459165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b792bc0a05a7ae9b9dfa65fdc6f6b1408527d89c8cb09224548aaf61c28816. 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/QZHN32361966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04410bea35469177c9d32057169f84dc0d5e53335b4c113727bab1b941c70579. 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/QZTB42286119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f099203023b6729e7ddfa1feb59349552f633504e01c3f80e7eaa8e8675c10. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB72300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974bde3904bbc418608c4bd233cd6a0af846f94fc5786f205f077a28366c1f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN82123963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43e18a84a835d154207b150ca7c652729415fcea540e15362c6cadd4482bb0f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZNWR2106676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a37b0734cd4f61917b9e7bdb9d6004a110c026be654e14a6e2d6a27a733145d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6L2165633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319b706bb5906c4e540bdc39242db6029cc5ff9c7857b5564d157b1f3268e610. 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/QZK6F2157030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77797b180bfaf37babade79deab9874a9159dd3ff3424de84e2d5d7a70e63eb. 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/QZES52113452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec34b372e300ed994369e3680f89fbbfc437e91a8c1ccc3b8468665b3dca7d. 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/QZWFE2441899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3a9637d8a00ea8cdcc193e8a3a2cef63015fb1d3fae08aa71f8cfd38cdbb65. 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/QZWFP2386758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51583a8b02f555f61a327c26e75b65da6967a8a40dc057fd6312752d00e837b6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEQ2310527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2448e8342229c9d286c68e54d6e7a938d6bae42e095fbff3ec78947108c0721. 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/QZMEQ2217456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec34b372e300ed994369e3680f89fbbfc437e91a8c1ccc3b8468665b3dca7d. 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/QZWFE2441899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996670b26d2db309daa2b870c273fc800813d38028e71dff2fa8f92b392a18cb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTAS2341631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4ffb6ed1bfa93d10dfe10600e182506eb95ef64a1c08d7c0231790749836d. 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/QZPJ32257276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db255cd7c2f4c40f2d7e3b9c06d8856fbe3be031a816bbc6ca046c2ccd8edc1. 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/QZTB32347923.
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 0x467aa076b1c509d23808079897417dfee2906f8e36ecd8048e76f3c9f4f186f2. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZDA42280181.