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 0x295d1764b12356270cc611f2eba1f3f14a4b5d32142bee5210ebe96e4a22aed3. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecc6288a-c186-4315-b0ab-ed17f072de45.json and https://artists.proofprofile.net/proofs/artist/ecc6288a-c186-4315-b0ab-ed17f072de45.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 0xfa7ed0b7a5772fe726bba2b834c009f443951c2432004aadc919cb733382c325. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM92180061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f89ecbd58f7b2fe152d96f8030820939d596238f1d87c66c4398196c8fe895. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2291540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fb67715d251d918197cf26e532169bf400955cb54e69d1fb1022f845e0b69. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH2297582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bc082321afbc8f3ba8e077d839b1dc269c11f29771be46088b8b45d719fb97. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM92235703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bc082321afbc8f3ba8e077d839b1dc269c11f29771be46088b8b45d719fb97. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM92235703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3024aa847db60ef038081bc5b32f7355f4fd99f5d9b801ab5177eef8e6a3e07b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US7VG2373573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67413a9b71f05e37a41835929c6306f8b7448b55f6180cdea6d291c5fbd781af. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USDY42358974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e85cc21c743aeb8424a564e09533449d1e39c1c653b29950315f280eefb2e5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4Q2350666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f27bc4c50236f89a6c82c8e96ec57608a0749eba2b56d1b01dafcab79d2102. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWZ2545120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720ab1d310404f2858964bd84efcb17e975c62822731d8007551a247722fe4b2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ5AB2422481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cf6fd6152db21f25b66824195ee8000dc14c3c62393fa19a6fae2d239993c2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLZJ2447548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5457b0033a3f5ef94f5048f4b50eddbdfc6a961a6eea71e6d6304e6ad64a2e23. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GXD7G2414234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5457b0033a3f5ef94f5048f4b50eddbdfc6a961a6eea71e6d6304e6ad64a2e23. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GXD7G2414234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b06bf7a83e438f3afbdd043f9e36e78adb524c2a038430ff5162ab9918f79d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GXD7G2453363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733b6ef5b5b2488ea6a001b70847cfca1fae2e1018238eca0386db5f34f36251. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBWUL2486891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e54913f62ea57d7650bf7385c1f8cdba037e42111cfe3e3d8de1a3466f23a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNWZ2542923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea9a59bd292a294ababfdc721eb627a8266d88fd3812b46116539c600495ddd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7G2562018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0cfd5012b17b1f659e5aeab91abbab421d529cba86c3bc28570c9bbfb001ab. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SGB502560850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8fa3887610c443d44eea5e2d822f2ba1156840f211dd44edc4a0745354495b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXD7G2543928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea9a59bd292a294ababfdc721eb627a8266d88fd3812b46116539c600495ddd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GXD7G2562018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0cfd5012b17b1f659e5aeab91abbab421d529cba86c3bc28570c9bbfb001ab. 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/SGB502560850.