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 0x05e4d69a6d98848e976dc973f5353ab0c424b41edd97cc66294b82d4dac164ef. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ab8618c-fcaf-4200-8d88-af94ae8b2e92.json and https://artists.proofprofile.net/proofs/artist/3ab8618c-fcaf-4200-8d88-af94ae8b2e92.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 0xd39a27370547d5494d4641ab9615d4eb94af5b4a9492707b759c2fa9deab616a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITUHQ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa511105cfbb2adf5250436b07221691ee8cacb086d2b75b35b859dbfe3b7ede. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ITUM72400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea509a1e1730e34016d61f7ecc78f620032662195b6f3ddccef0b420b030528. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITUM72400645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd697cf52753a29832f2add22e50c25b3c97c595cb204ae9322ba349edcbdb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/ITUM72400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ce13fc45c4c67209ae960cd89fb1d7ade13700f09eb2f30db85398839a9ec. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:07:17Z), 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/ITUCB2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ce13fc45c4c67209ae960cd89fb1d7ade13700f09eb2f30db85398839a9ec. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ITUCB2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea62bca01302ab07f8dbccebd2330c00f13e0e250f6b48abb1fa33d24345708. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITUCB2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157be212040d447064885f1eef9ad0248f0ff40152912bd98d19cc9ef8ca4215. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ITUCB2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30b0b9db556ff1233e0ae6be7a93d83715da1dec13906efc69ecf7741091024. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ITUCB2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bf93a582e491540e4eb981c3533e18efd6a142c9e88c7b511fc592a6582d3d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITUCB2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e173346d3052f6ae296440df732911215959bfbc528450e41a0f8edf7e635c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITUCB2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd604bfa193c37236bda6cbe59a46b8e0a57d4894f47468e27d8f84e12e369bf7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ITUCB2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38a4aeab7096ee66e1665a2defeac61d5e1896d65a342d66a98e405d691f9c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITUCB2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10b373afb8794e7606fb7cb1393865ccf9a9df38712b98f70a0c1dc9ee1237d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITUCB2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88f2919eaa882992e1ea6d21c839b61b688d586e424e62c8858e910ca61858. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITUCB2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5101a230dac7bf6d74fc30c11fd3f7dff7037df6cf82a6e878434144446b3ff. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:30Z), 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/ITUCB2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c928ddf89ed9b1257b0cc7c6107133f90e696a16dfe2a8c15c1327fcd06ee97. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ITUCB2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64af9fca43337ffc41e928d726534fe64317a44afca6cbd2165dc57c1df7a47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITUCB2100053.