Sinister commonly refers to: Evil Ominous Sinister may also refer to: Left side Sinister, Latin for the direction "left" Sinister, in heraldry, is the bearer's true left side (viewers' right sid
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 0x34c59e418756c05b598bc00d6f018c7903f9652cd5ae0f813babd9d5c96ed40c. 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/9b0f79ab-0442-4dd3-8e45-f45af8f95a4e.json and https://artists.proofprofile.net/proofs/artist/9b0f79ab-0442-4dd3-8e45-f45af8f95a4e.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 0x31f1e42389aa12c8b852fbf329e46b4990e3ed228fa4634597d9dc78886a1941. 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/DED839738406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c15f0e615b793a2615b111c5a9991092eeb63cde0ca0ff8fb4397e1b809c623. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DED839738407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e746b5fc98167263755fca95709ce4b365602c2b570b750932aea3375461800. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DED839738408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768b91fb8c66fbe974ad9087234281d8a3d4276252d154297aecd7788f1b1334. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DED839738409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f5ffc9b0515eedadbe2a456fa387f06a1123bbb2111082100e6ea9e858a82. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DED839738412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe0ee63c032476cf716234d1344dd57469beb4c549ba5b96c37cd4be91a2b43. 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/DED839738413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc232e73b456164a77afac54a94164fd4d6bdccafa7737816d9bf5534b6edc18a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DED839738415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6473b2cd933efccfd816688f89bdc9a739a40a3d6fe428ef25aa6c33656bd3. 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/DED839738417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0185725b7c7371362560547b45e60dde7353fb9fc0b209d43feb1f4f8815e5. 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/DED839738418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83d33fad11b36530a37f27bd996e71c54525a29c2ba5b2b525c3b193d206bf9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DED839738419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37975661013d6f68099e9dd7c021081489eca2cd587b40b0326a628f30d7d657. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DED830158902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85606e9254849ea5a03fada18956841b880c9153bc6fcc7eb4df0156778a1a0. 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/DED830158904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af92f480128c22eae3ae9a57feb4cdd67378d9e04abc6a54eed93b648e6b412. 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/DED830158905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8c5681321404c476f1c5981a1af693647ea15332e9bde54dc4be9834a47e39. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DED830158906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7681f0fa42bced709855e74d0c4b6dcd4cbe2789b6b9633e6415e3765a63ec. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DED830158907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6013b23ed5c9249b7bc13f76b9d1da633f6b5c6ec2bff6e9ac26816c3f355b03. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DED830603249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c51beaa57cb97654b1192c921b7c9fdaac1b442b9ea5bd51c79bf1a52aac03e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DER370858801.
The Post-Apocalyptic Servant (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e498bdc1626f6e1845f61783e640d01a11849b30661651fb29317fd9824ea. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DER371796801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def7c7002e6e6997acffcf5743d918e5c3d0b2285df8c56f62bad8a76e1832b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DER371796802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2c317e155c2814dd33f5e59fa4c1b4db2c6f0209cb429ca4695dc0e5f627bd. 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/DER371796803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4bc45e6941406ac4c76fb70d3831c25a1ed184589d050999fd3540dd854c51. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DER372007402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4bc45e6941406ac4c76fb70d3831c25a1ed184589d050999fd3540dd854c51. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DER372007402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb831fe42fb010871d58958454d8ca73b9e61e1bc99dbbf2df12d66e1768b4f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DER372007403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2c11c52238cbab5baf64d974aa2710215f7079d354f763597432a9923a06e. 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/DER372007404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe16fb0ef8949d3e95b12e23bcdb7af9ff52ae639b16c7589a239a0506a830d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ21963362.