thumb|A toy kaleidoscope A kaleidoscope () is an optical instrument with two or more reflecting surfaces (or mirrors) tilted to each other at an angle, so that one or more (parts of) objects on one e
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 0x7abf7dfd448843a85e9c393439c1483fa6ada466b541c4e02f36a89cf740fd7d. 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/f7488cf2-2663-48bd-8814-b8a05fe2762b.json and https://artists.proofprofile.net/proofs/artist/f7488cf2-2663-48bd-8814-b8a05fe2762b.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 0xd55cd0cd51cdb89fbb7a635891aac9e1ffe315931f829abb14d44c077f515c9b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZS7J2387225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f2f453bb836ddecd634074b7c029c3449025c72fe2f6bb9d080935e735393. 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/QZS7J2328418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb5fb8c20b52755dc6fa05a89e7289b676584ad02ece7e1dc8488961cebf094. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2381212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71ac063219cdad84a617a4b91af3a49fb4b07c189abbabac254fb16413a09dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2305249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99b100885f87ce76d8513b90c57fe5deeb2beab67c05ee481ad9176903afe23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2333334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d8873c5e14096069f798c249010ee6f7321eaa9b90cdf0ea8a9f24ec996826. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2321981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4a5095f308d3c4ccaa9fb55fc510f3e6b0542a13c6a53c52b3313e62d8f9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2379354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ae5f9eaf3671019721c925712387c5179cbcf55b85a1bda4b260fcc3aae24c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2384023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41459f6584dd55d743403fd283488e73a3781edf9f951b551ec9b4a86503b397. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2341271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df80a8a8df134ef928b8994dce19633143e7e33c4f69e3e3594b1a139cf05b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2397379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3801976e449eab6f122101cfe6c2bc945775586a31eff92c75aa4e153e4affd9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2314436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d2e64a0cef8909f3eab38550462da13820da946b47b3e1bfbd45e5027173c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2302317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25417d9da92bc3bec1edf135ef055c5c572eb0961f257328cf1f9d0ace2cf25. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2302375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf61e27b3a1e4972ba677281235d1044d8aa9f2a92eba43c094db83e8d5fd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2373156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f8ce5f97d8aa6c519862f8f2d7849879d3a139c8299e67c612cb4f4c753bb6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2330847.
Mercury for Sleep 01 - Kaleidoscope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe8cf71b7a63f014f39f39c491118f7a194599a5408949307be8cc645e0849. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2357161.
Mercury for Sleep 02 - Kaleidoscope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601bb1982059f9c0a19574acdec306ed5ac56cf1a0eb3096a9b8c9520d0bdcba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2314882.
Mercury for Sleep 03 - Kaleidoscope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f280ee2215a502499faf101941dd452c0a98a83662437de099c0aea2d7fdac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS7J2393833.
Mercury for Sleep 04 - Kaleidoscope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce70b764d3a9680d4965080789bb9f2a263e2c9574a9030051f14e8b6d1f9809. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZSYP2378726.
Mercury for Sleep 05 - Kaleidoscope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518aafce69432a8cdc959a2c15ebff334e9ede6ed5a07d54bb2f5a51914576db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZSYP2363408.
Mercury for Sleep 06 - Kaleidoscope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6820798d55de462c46edb12195a92cba7c24f07d215ac52c60d10ff8e99adf7c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZSYP2370879.