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 0x89f810d3b1bf1cb99ba824b8bb41d4ddd3c9e00dca3f0ba305e3f1e307b911ea. 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/584cb435-420e-486d-a39f-b5f9b3ded6a6.json and https://artists.proofprofile.net/proofs/artist/584cb435-420e-486d-a39f-b5f9b3ded6a6.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 0x8849bc7f0044448985a84cb78892cc602304a493b2eaa85a0fa387b4689827c9. 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/LTA701800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af424de8869589c984d7efd9da4f03ee1fa3be6434646627029acde72f11491. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADN1880400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7877ee6c84b93176f3564f866ee76de1f9c3751209c95d24cb5a86fc89594ac4. 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/TCADU1881705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea3ad70f534bdda066d3760a2658a8058fdc2fc04c1bf9fc4691ec4172d1df. 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/LTA701800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a2e9e0d96ce7c59f0734885517b620e64b4acaf1accf2441486c1ba70912e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LTA702400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c10762284ca36497f87a01b33902142903f3118dcafdbad9ec1354ac26a90. 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/LTA702200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e1df60eb1712893aae70f9a3e5a31498e0ddbb09db8d463752451013cb492. 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/LTA702100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614b11b38e89c0a92a5ee8615d8b714084a504bf5146b7c7a8fbbab410eecb84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LTA701900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105cac7a3258abe6d6470df4edfb5e1edd0aa120114e6450f185c9001105643. 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/LTA702000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4d007e005dbbcd6ec77956fb54141bb4430692702cfcf7bf684c2403c8039d. 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/LTA702000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddafdece10d035c241fecb6e566f27e0d0d44c21de66010f569514803333bf8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LTA702000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f339c539481f9a65d75e321c7c4a3698c75d9c4d86ad00867e2244fa6d2ddb2. 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/LTA701900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a0435e299563b2b9953942025172370862ec020e546a677d28903574ed2a6. 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/LTA702100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f17a96b145364cb65fc44a9653504ed18efadaeb4ba9175b3b9faaa8b4f18. 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/LTA701900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a18240e0cddc6ddd26cddc7b34a6d3f2ce44a6b4196945907db2a9bf24dc49e. 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/LTA702000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38cf0de3a338a2dd29f6b15f3221d5c37a2d2e6cd3f4aa3061fe68f3b367686. 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/LTA701900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3ef0673b5cde6bbec0bdb7a55429c9f3b47ca9eb2be13c504c50e6929baa5. 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/LTA701700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed11dcf69359f7ab126169039fb4ce889ebc4fb8ff142e99172a38eabfdf702f. 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/LTA702100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066c4225f30e0ccb4dba21433d3a384b465d41f03ab5542c26d1915e4ca365dd. 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/LTA702000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e1df60eb1712893aae70f9a3e5a31498e0ddbb09db8d463752451013cb492. 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/LTA702100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb681b4d7f5b166266459886865455c798939eb9485733133b2505d0f363f692. 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/LTA702100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434b85b9113b15e74173ca2fd7751ee3c8db95dd9adefc14b2ed3069ee27fef. 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/LTA702000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f17a96b145364cb65fc44a9653504ed18efadaeb4ba9175b3b9faaa8b4f18. 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/LTA701900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb681b4d7f5b166266459886865455c798939eb9485733133b2505d0f363f692. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:17:39Z), 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/LTA702100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c36c6ce658857d027c8d38aace355a9a437a8896c07edd1f63d519ee11bcb. 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/LTA702400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d56b46a0794fdc1a7884ba3ee1d445ecd1c5a2b96343f66cbc20fd9cb5bf5d. 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/LTA702400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce10a407a8391bc46ea61403186d0bdfdc3377b6fae50c3ca11031557c0050f6. 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/LTA702400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ad8df60fecec5cb0cb28fc41a3a47175b8b7e8cbf8344b71ca2500c68bb857. 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/LTA702400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80e91aed6dfa544c583bd622f6619405c7698a99b679970051fd259c0cb7c2d. 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/LTA702300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad7c54cb013cd5253a23c794ddc5de54fde3260cf78fca3025274821a59935. 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/LTA702300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066c4225f30e0ccb4dba21433d3a384b465d41f03ab5542c26d1915e4ca365dd. 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/LTA702000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38cf0de3a338a2dd29f6b15f3221d5c37a2d2e6cd3f4aa3061fe68f3b367686. 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/LTA701900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3ef0673b5cde6bbec0bdb7a55429c9f3b47ca9eb2be13c504c50e6929baa5. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/LTA701700001.