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 0x8d1aea0c4f866dc9a17fc44c49779d2d8aa99f1090a0ac758600e250b43f5f85. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bf36e99-9fde-4090-8cf2-27604d84016a.json and https://artists.proofprofile.net/proofs/artist/8bf36e99-9fde-4090-8cf2-27604d84016a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pique Dame, Op. 68, TH. 10 / Act I: "Gori, gori yasno"
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 0x59f5dfc31f87a168cc2bd2dc7b8b3c1dd9f1202c319324959e0397699378ae40. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF057731802.
Pique Dame, Op. 68, TH. 10 / Act I: "Chem konchilas vchera igra?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57afc9b86847c7eed01803226dc4f4bb96da3bf61e852b377fdde0f76fb1f079. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEF057731826.
Pique Dame, Op. 68, TH. 10 / Act I: "Nakonets-to Bog" - "A ty uveren" - "Schastlivy den" - "Skazhi, na kom ty zhenishsya?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcae4b9c412433bca7818b75abdf8a7dfc157772223e731fb21718fa0d011775. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEF057731804.
Pique Dame, Op. 68, TH. 10 / Act I: "Se non è vero" - "Kak bystro groza nastupila" - "Po- luchish smertelny udar ty"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3bff6f02645e17e6dcaaa27d05b69e9fc940c19eb7961da16bc7f4291b5f3d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEF057731807.
Pique Dame, Op. 68, TH. 10 / Act I: "Obvorozhitelno!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4714872efefd1f4e679f5d827ad26596ae1cb35089e191faed74448aa51646. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF057731809.
Pique Dame, Op. 68, TH. 10 / Act I: "Da, vspomnilna... Podrugi milie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f60c96cc437b29dfe324d7ed4015930cd0bd02c45cf1fb09bb87a110fed803a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEF057731828.
Pique Dame, Op. 68, TH. 10 / Act I: "Nu-ka, svetik Mashenka"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f22061806b337fe17ef1c6e222d3d9860c8adc549efc1b00e826ac1ed8ce40b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEF057731829.
Pique Dame, Op. 68, TH. 10 / Act II: "Radostno, veselo v den sei"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe673e98dce3124ddc52d4b431dbc58442c69007ce45090a7463acc6bbe8e0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF057731812.
Pique Dame, Op. 68, TH. 10 / Act II: "Kak ty mila"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e606aeac1a6603711db2d69a7f7210c522625e8252843efad19595e00bd81. 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/DEF057731839.
Pique Dame, Op. 68, TH. 10 / Act II: "Kto pylko i strastno lyubya!" - "Tsaritsa! Yega Veli- chestvo!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31105a19f9c7b898a1bb66afbf2f5c3bbaa09067d74cf5d6baf49e36974f10f5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEF057731816.
Pique Dame, Op. 68, TH. 10 / Act III: "Budem pit i veselitsya" - "Dana!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccbdc585c020518ea9b93c893071ee1e6066cdac96cd3f113f6cd1c3bf5179a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEF057731823.
Pique Dame, Op. 68, TH. 10 / Act III: "Yeslib miliya devitsy"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a4dd3f712fb144b69bab217b7b4395320d3193c79a608c18137fd7974fad92. 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/DEF057731824.
Pique Dame, Op. 68, TH. 10 / Act III: "Tak v nenastnye dni"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e690245d6848185f223f27ec569df8f8a683c4c5a1eafd2bfb09165468e8c68. 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/DEF057731846.
Pique Dame, Op. 68, TH. 10 / Act III: "Za dela, gospoda"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08930feff6e947739870fc6dda4629c3c42a58e242b8558e23eb2974acec9474. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF057731847.