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 0x5bd51a674054e08d05b85b935691dde204e36182a41998f208cd82ca5e452898. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d879a58-2755-46be-bca5-2b83ce202146.json and https://artists.proofprofile.net/proofs/artist/6d879a58-2755-46be-bca5-2b83ce202146.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 0xce90af00ffb8740445c695957900d71c5b83057419ffb83e44edc51715c00dda. 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/QZWFM2540198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8416d429d5205a63d036a6e78b2f8df754209cdc07705636c4f6fbbdc35e8ba2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:43Z), 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/QZWFM2540200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61106737021936f40ca39050694449a404bf1c4101c46f54ce23445ecf304b27. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:41Z), 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/QZWFM2540201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d57db0c8080ba3be099bb48c9f2a382b83d634d18529ca24ea0203ed23971. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZWFM2540202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611605c830f0ddcd59afbbbb35ba7face55d38c2e0500ce2cd3fa8a7ec61f58f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:05Z), 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/QZWFM2540203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31083c744c86b9273bc68a1534f8f0494a74bf7753e3df3dfe340d8b79c2635. 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/QZWFM2540204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5d0f2404935d7a83de61c8fcf0b599ba1cb24d0080f463b16fe24a938aada4. 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/QZWFM2540205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749ce84a8e2ba3812321b3ce007d6fa13b32cf933742828c01a7534448c6049b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFM2540206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f74e9849306d58347f495ac612858bc6ccd6425f897f5cc6401b4aa671d175. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFM2540207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeb478e9fd93f924e0355683da54115d21a95d6096c45168bf11645c378890c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:25:10Z), 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/QZWFM2540208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc801cc26893d80e76c7981dba8cb4f39d3d2841cba644a24cf9f674c77f77dd0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:39Z), 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/QZWFM2540209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b6dccdf5424b014fa40d6741bb13843fedd2fc56a550ac6a8fe3fa5af60e44. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:21Z), 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/QZWFM2540210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e0f09c59c80324d0b8de8b71ec2094427b6ff241fcc4a402a8772bf99fdc49. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:06Z), 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/QZWFM2540211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47180ff5403ed7cb5081261578fcc95c60777a6a3b713be703a000e2299cba. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:19Z), 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/QZWFM2540212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f7a01dd363cff578c9d9fd9d0a91b26f019fc5597e600fdcd11cb657552be. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:05Z), 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/QZWFM2540213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaf6c87141e61eea5cf4c5628f59005f36752dd770a53f2efdf600550effc4e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:57:50Z), 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/QZWFM2540214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cbfc6d3bfbc0580ada170abfc475839ffa733d9c3c3e4f40fb98c4f006ecf8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFM2540215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a3e062235b12a560a2d287079984e629126d0fa84f675ab0eee39230dc647. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFM2540216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c34a01b89f28236fcefb4a7e0a876fc9cb7533d28245d3833b850c26610bc9a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:19Z), 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/QZWFM2540217.