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 0x85f51fc729404c5cf51f6f1a5ae180e07fb1590b7d97f6f9c7ec0a9a554dc17f. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33bb3896-be04-4952-afd0-c8f3a97c07c9.json and https://artists.proofprofile.net/proofs/artist/33bb3896-be04-4952-afd0-c8f3a97c07c9.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 0x41b534254054c1b823793c6a584993c87cdbcf6283b373c1cf0a02c146e5d82f. 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/JPR502035335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb25c3d575a7d1c89399b4db575a869199e31e182a4b6de8780b7ee04fd2d6e. 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/JPR502035337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b89823ed9d4bd2522d3d518e8b01108886f7ab98244a3748f8a0af6555adf0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPR502035338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d6aa57933178c0f21b1ffca4a27f2468490915882a916cac074d775bfa67a4. 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/JPR502035339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47af650fbc204a770f7fa7ee13da5ed50fa0f90f3cf429050535680d24457bc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/JPX422100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aa30acbb69ffb0a91457c4329f51d63776aba1af76301a71cd0fe9db2b89bd. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/JPX422400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd374887d381dbc5ca3d591523f558c914bc6d647a4d5f4c3be3a3d7f613f8. 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/JPX422300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb175ce2d053df70d87eb797c6a0e8b36095590f55108a2c58aea4852f344276b. 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/JPX422400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca45e335d172f7f685ad34dc63c1ba5399d277c142ff65e2d6655d42eda56fa. 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/JPX422500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a9e00f2258d9fdf76b86ed97522042aee0e256bf17e25e2bafc06c51ac7e75. 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/JPX422500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca45e335d172f7f685ad34dc63c1ba5399d277c142ff65e2d6655d42eda56fa. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/JPX422500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2346f8494963160ffbfc5d62ee8d1faacb111e1fea079249c47f04a1d2e4ea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPX422500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0232323d96c90446e800615e37023d0473b2955df703bf672e7cac61e9f6c98. 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/JPX422500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2346f8494963160ffbfc5d62ee8d1faacb111e1fea079249c47f04a1d2e4ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPX422500043.