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 0x3f9ea33626b1c42afb77dd3c5281ca3dee420c85ad1bc8d457e37b889ad174bf. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a92fa1b-ece2-4443-bb59-9c1fc3f2ee68.json and https://artists.proofprofile.net/proofs/artist/0a92fa1b-ece2-4443-bb59-9c1fc3f2ee68.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Henri Seroka: Credo, 10th Anniversary Edition
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 0xf86b1ed65f7e23e8b5a17468b5b624a6082a207b2741ab830efbadd27a3666ba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V82569193 — a six-check JSON result.
Arizona Roads - Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b5c986dc7615cbc05d645676d7c1aaa40ad3adc544cdc9a899b1339b3723d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632499 — a six-check JSON result.
Comandant Henryk - From Jacek Bromski's Movie "In God's Little Garden", Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39f2e91665e8ee9b4ff76887f878c01eab7d968879ed4e9ad13d0383e28afc. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632501 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1163d96a3a2951c2207809248b0b7f353c3fe0e7ae0dddd354a9d05a1e3db987. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632523 — a six-check JSON result.
Struzikowa - From Jacek Bromski's Movie "In God's Little Garden", Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c162e61d8cdd0b16ff7aa7134d6615a582c70023b8ce5189abd85a19968ec5c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632503 — a six-check JSON result.
Pastoralka I - From Jacek Bromski's Movie "In God's Little Garden", Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5b65cd9940c5fabff68229a52b95b072029e50dd695c1c2ed7c39e81ab23fa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632504 — a six-check JSON result.
Luska - From Jacek Bromski's Movie "In God's Little Garden", Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96723915fd25ea956fa5995efd69f0eb7e7647b2101ffda4a4b2a6161abe59d3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632505 — a six-check JSON result.
Gipsy Waltz - From Jacek Bromski's Movie "In God's Little Garden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fb2fefce867d72d2c0a0f199d06ec5eeaea43fa961dba5e4023554e54df48a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632507 — a six-check JSON result.
Palace's Waltz - From Marc Mopty's Movie "Ataturk"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff852058b02ba760be5455cdbd1d1e0b320a2d1539b424c8abad45cc52001d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632529 — a six-check JSON result.
Easy Go - From Lech Majewski's Movie "Flight of the Spruce Goose", Orchestrated by Ralph Benatar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe92d4aca13872ba58e18eddf0866505a5b5e14d1bd5dd837ba945df747ed7af. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632511 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2531812bc0594fd95e8e025fca52d75f630e9f3148c89c5e6c69c26d7c77ce11. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1632519 — a six-check JSON result.
Insula Ithaca - Orchestrated by Krzysztof Herdzin
Choir of the Maritime Academy in Szczecin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf8ad1d82c9fde11e05aec2e6e33c6b274555400f7ced92f6500567684c1fae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823918 — a six-check JSON result.
Sirenes - Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a79ee72a9380158b6a5b850b9560a183dc4969d6df51edc7069ecb48aac29. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823919 — a six-check JSON result.
Calypso - Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc2684e54d559341655d1832a33d2d6d924f73c3faa2c0f2f568285cf829e8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823920 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55a9db49502b43b5f8c33ba546e95e0cff62fa9f5d7fe1772ad6de9ee8b35b2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823921 — a six-check JSON result.
Mater Matuta - Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25251024a3b7d1bdb4637cc49444493da4cb6c35b7af306525ce3cd792415391. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823923 — a six-check JSON result.
Aeolus - Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54801a87ab01e22034d50c586946caedfd37609e95114bcc059560a85b1f83cc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823924 — a six-check JSON result.
Finale. Lotophagos - Orchestrated by Krzysztof Herdzin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee9a58cd2700dbe89c7fba9ed4e55de75aaab595509564182b8d4adfdd88ae4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41823926 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb15006282bfdfb7a1183e3d2d167c77d61f3a089ac9308e94780a96414f9cb6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEB141504219 — a six-check JSON result.