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 0xd3a84fe80dcf83af0dbf0b01b343727849897c139f0bca64882d6ad9d51f1b59. 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/15a857ec-ef05-4b2d-a402-93e27abbd755.json and https://artists.proofprofile.net/proofs/artist/15a857ec-ef05-4b2d-a402-93e27abbd755.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 0x75a0284b2767cd051e88757c9dd82e76b38dc9b80a07e691b58852530d357cdf. 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/ITC931711402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82feb3fdd959362e91eb779f6c25e630633396cb0079a26757ec9397a9aaa446. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ITPON2000028.
Lights (feat. Gianluca di Ienno & Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2275e8afdec996aeff49b35d1d6e1834c77e0a62e98c9488af5a839498ae2655. 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/ITKCT0700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193562500277b848a3103425b12f0e572df7a4220eb46aefa7d6e3148b4afdf6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITK601500651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be5a38f6b89cea29fa4c09094eb940986580225fe2daee87ec647612641310a. 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/ITKCT0700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1c14acc5195b31dc270c7f427277c299370b9ce4a70a5035848fec73198761. 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/ITZ682469041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf41e98e2485fc2e540784d62c9b5f0427c7fb9c21b8ac92c51a999852b6c54. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITZ682469042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895380554466173b06b8206309332e0ebc7dcf1756cd627f052bde31b95d08bd. 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/ITZ682469043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47110cda1d718b3dd7f3793035aacaa06b2ead03895aaef88ec0ce1922e66914. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ682469044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ad8cdc3260573b499ae05665492be4bc3754f93839d20ef2d990ecb6849d9f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ITZ682469045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a53c382808cd52f73a15d586bcde56111d15ef212a2f0a185de69e10acb602f. 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/ITZ682469046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4671de6bea640e45ed4a67cf534cc8e429306665907c8935dce8f3d57c43ee. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/ITZ682469047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87585b7584daea858a3c97fa94e3ea80a60be8b4c944faae8b50b0c2fa58ad0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITZ682469048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39b27cefc531b836527f51e1d6b381334bcc66fa57ad87c9cf36fee43e1ff90. 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/ITZ682469049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cce7c17e0a91edcd21222de121d0f0e3406273a8f379b00db2efed4a1f5af8. 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/ITZ682469050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476b63f5f8c1cbf192cc76377c423da7db6010c3113d2ab6392c6b962e97e9f7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ITZ682469051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69ac7c8108e9873ec4784fbc399e5c456c18c335530138ab87df4aa9936d1ad. 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/ITZ682469052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a02737e9717cfdfd37a3810d272b4b6dfc0cdc71c365f95e840749dff40389f. 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/ITZ682422013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338087b6ba889898d178e571d312010c036266b0c4857953df9937e4529e85e1. 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/ITZ682422014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c8d7ea8bbcba5a7f2a693447cd92d5d47786dd9ac2dab70b32023f75a51e3f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ682469085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc7e7da39001f28b1acdbc1aaa0630e3fba03d28a9597123fac3f643249f94e. 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/ITZ682469088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d62c3fc2383e9d0438e61231ee246df1c9a468fa32d02ef9ac860b21f67413e. 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/ITZ682469091.