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 0x76bbc95606be4233b6e14d79484464ec393eec1dda210010049a674cfd8fecb1. Chain 2 (Bitcoin): anchored in block 954000 (2026-06-16T20:18:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31cd1f03-2f67-4000-901c-7810eaf8f975.json and https://artists.proofprofile.net/proofs/artist/31cd1f03-2f67-4000-901c-7810eaf8f975.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 0x632e86e4215fe85174d37008b47691dbfb46b70510b17379593d160420816e4f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HUB040700331.
Quando Quando - From "Anconai Szerelmesek"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a4916e2f30d20e2d115952ee703357bf505146a3f0b3962d17f2a03350fe09. 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/HUB040700332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbceace166e13416feee5bb99abda586104b07f8ee4523c98c8fbf44ea9df0. 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/HUB040700333.
Hogy Mondjam El? - From "Rómeó És Júlia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fcb4db5047459b6f2619f62c9e933e0e82e78226c70bac7883e9e0c70c6d7f. 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/HUB040700334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a4aead9d730c671f78789e5b300d695d7e71574890ccce028a144f8b4187c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HUB040700335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e3927ea8bf99776e0b45c1175f2539350964fc2aaa86d0f131d2dc8e8fdf8f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HUB040700336.
A Zelóta Simon - From "Jézus Krisztus Szupersztár"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4a2cf317bfb5d51a0821d20f197a6ef848a8dfb8c16759d96d9479a77d570. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/HUB040700337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac033ff9927848a660f88484de8e1c8d6e38d5cb1d90889485e7ce77c4a0bc. 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/HUB040700338.
Ii maestro di violino - From "Anconai Szerelmesek"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1dfed9b68ee59475478e4e029b4053cc40e5f0f51d99b2bd8a9e94f27818b4. 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/HUB040700339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ebfc22ab9f7fd9633d13bd5b188ec4cff020bdbd59c28834d1e819e9bdf3fe. 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/HUB040700340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d48935e87532239933b8afc03488348d39ccd125765e7db25d12bf777f150. 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/HUB040700341.
Hirtelen Seymour - From "Rémségek Kicsiny Boltja"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a49e8dcf4b4c1ba36e97efec712ffcdadb23751c21b63bf3ba23e8da1c989. 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/HUB040700342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac643489afde7e19e11ba62481ecf3a7a7afa26663bab888e39de6ec621d3d41. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUB040700343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab212356a599a0946e1b48a8c9ddb3eb9601b16e84461ce103b03b90c87d1bab. 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/HUB040700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9039c6e1d1e2c97b852ebc983d1c1a0ca95c6389c3c0e4a1597a176a25c893. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HUC592400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745b22358e11606889cbcf69beaae3a7cbe00522dff33a242f3559102f6e989. 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/HUC592400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4387922700d14d1ee13cec577900f4026dbfb2851700b92062b5f44d29dfab6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HUC592400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f77150cf921dc8f0a2eccb6af3dd17981762dbf1f4e4aa2dab1ed2a9be70a7. 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/HUC592400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0331699838de6176b5d3544082e2855fb0ce68aca84ee1c8621fd2fce4d3e3c3. 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/HUC592400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005bb279bb3ff082bb1a73b78b0150c11fb363539cac13167f774d89de2c2498. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/HUC592400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0f65f23e1c7660211eb430a56e2472541ff53930a5370a0fd3270198d6396. 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/HUC592400133.