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 0xb926a007f0a80cfdfff34675d421626297576475e6f1588d358a7f50ef65ddc8. 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/b8badea2-aad7-4057-afca-79b732398d68.json and https://artists.proofprofile.net/proofs/artist/b8badea2-aad7-4057-afca-79b732398d68.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 0x7dd51724c80e1696ed08f0ce9f8cbffadb5c40c8ae3b56750edf0a543c3a0471. 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/CZA232301605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34354fdb5d00258ebd357e0aa96539351e3d396a379d01c583e18992db43f6. 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/CZA232400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8bb1c977fb3a8b235811e13c3bb7677a9bb8fc5337e73b31c55401ab091c7f. 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/CZA232400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9958311668f734d4a879a67a8e85a475e81bc7795082e028e8d025553873e955. 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/CZA232400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1449d10a690bf09bc9f41c17784b97180caa654073ef7472310ef4920065e024. 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/CZA232400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64aa35ab39a1cb91fe2a78a464b942b9dc89809429271aabcdfa394eae49b6c. 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/CZA232400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b176e0c6420e53eb9e993d5b0b40c4eef3d2199f38a8d562fd049eb569a6de. 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/CZA232400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd51724c80e1696ed08f0ce9f8cbffadb5c40c8ae3b56750edf0a543c3a0471. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA232301605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34354fdb5d00258ebd357e0aa96539351e3d396a379d01c583e18992db43f6. 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/CZA232400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aacb574016059c3ea6cfe81f61597d9517875659908663fbe68320cbeca05d. 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/CZA232400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95749b0a6627167c48b0dc34f6cefe2a238041cf43d610e031d9349cf78b15a. 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/CZA232400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ca38667edba5f9650741d89c7df1b58c263e9ae4f1e5e9de9aa03b5ca6d87. 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/CZA232400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49feeef61f21a661b35ddf2604e312c66f3917492d5e64c71f185aa98e3d4d. 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/CZA232400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87979f4ed29ed744ea1f8442da8d2c85ea4c87953a3bf0795b2e761a08c4344b. 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/CZA232400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d5f4bad44e9ffd46809a07ce91066e21db30dbb6ef299b58203b783824a6d5. 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/CZA232400421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a68a9ee923bdc2821648d4f66f0f319c90e754d775087ca4f989fbd8ca99ce2. 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/CZA232400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a91b3564db2bb6ad4b4ad5145e981c7433c9f663014323ee89c209fe2a5777d. 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/CZA232100261.