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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3104cf163756b1a6bab882be9625e04f9be1a6a856dd72a1277b628206684d03. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eeea91af-ee12-47f6-b8c0-d0829c1eb445.json and https://artists.proofprofile.net/proofs/artist/eeea91af-ee12-47f6-b8c0-d0829c1eb445.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf592a57c2db2d84d3c7247c3e861a1e6b8ec4ac8275eb03ff12188f77fddf5. 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/DEAR42232950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef7157d0dda33ba7f3ed481a997fb9cc82f9cdee90961e0d128941e49474b1f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEAR42230843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01455d80affae9d3ae71e347abe364b8669bb84a5c1bf5ad74beb207460cb220. 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/DEAR42220705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5408167697de63d313131c2114524487f39bb8502f7e6060e7127b6d475603. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAR42249911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e16caea26c39c56dcd842e7ab86df5e4bebe47eabf6eefdc1e0b3daaf82861. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR42254867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0261b0d2b5744d069955b531c881bcd38827c61ec0b0a8004e7a48a28e9813. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEAR42279762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e092fa5c637eaa9104b427161ad771aed2d153aee16c5052e087721144b9d. 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/DEAR42264747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5aa289fd6a5c7d2ee31a20266f27b1410cf329534e474cecf4b92f145d1b2. 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/DEAR42298745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb238a2b5dcc30b02e3ff150adbf7572ad7c307f6c918f848fa389bfd71adba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR42261017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f7e134c82af5096bd4f507c119cb44d7b60e622a0854b3573b9d3621a47252. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR42288059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61d7cf5ab98eddc7a9b99fdf7887e8e74524679d97162e356f8cd909a0c857. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEAR42248288.
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 0xf56b858ff658b0afa398c7ca37819c09521e4ab742ed68c343ab4af9dfd44f84. 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/DEAR42259625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebe5c634c28adde83ab72c62ebf50721b940b182f007fc3311d16af265cd6bc. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEAR42251365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d73fca6a5c0bcdeece7632b6d1a8553c769ebae7723b8130721752fd396e24. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42228204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9922c390c9a1556392549b687e19d5b6710e0eb511d2ba1b67c38c32258714. 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/DEAR42248611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b92472d5553e3ea9f2ac93375e4a3383a02b55883dd2dddf5d7b10473dd01. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEAR42291076.
Colors and Lights from in the Dome of the Tower
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f89b43df33c3287b3d16803831ec6198d341fc89c4d1756325243b62121a10b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEAR42220654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd543d14095704fddb571f8c8b07f354984f3a6f08163104675c817e57e0398. 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/DEAR42256504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ea0975dfbaf73f7c22f92928705a6e39ee0971bbdb2afcda0fc068243fc57. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEAR42286461.