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 0x6f7e7b08e8727c73e273c1705f178cacca52747b862aed372681dd4752c12f51. 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/6f8396fb-f325-42f0-bd01-06d82756c71b.json and https://artists.proofprofile.net/proofs/artist/6f8396fb-f325-42f0-bd01-06d82756c71b.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 0xd1d2416674ab33a55e99f35ce82ceee057c9c302b0707070be9b9b0d74868ba0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:50Z), 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/USTC70873398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7b30c855f5b484311b2963df9e73afb351357af3eaa79924770c8c88cc77dc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USTC70873399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c84a46de55e37b71bce48a8e801e8c9ec679175a662c3ce21b99e9911990e1. 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/USTC70873401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed85c567d7138818b46503c5dc598e2970fc1581d8342bd9462ff56a047df81. 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/USTC70873404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22ca06cb9e26e607f6c8e162caa3e431099cbfa47b8cd60f4d68eccbec14443. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:54:14Z), 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/USTC70873405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fdf209af8fd33f933b9e847a91c39768576f5e99485117f1610a3bdc58b08a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:31:45Z), 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/USTC70873431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c394df8d0ef692be61e5df63cce5dbe94cc09d3617c94b01b07c2dccc14622c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USQY51119344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dff0b0944e65e7786b330a49ff619564a93507ffe1d40327e07eebf3581ff4c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:39:01Z), 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/USQY51119347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c3a041a61a187b533c4b46e0d6983d60363b18cf1312c0422ddcdf7ba861b5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PEBQ91608725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed4c1e77e81f32db231e9787e2542ffe9f9b07eb941b171749ca5d9500ab0ec. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/PEBQ91608728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242dbbe2a4358c0a64a9610087f464a8dd74d08ab689b45056066244c573ed40. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:24:59Z), 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/PEBQ91608729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875b4c4ac1eabae1906d4723be97caa3ccadb9323f20966a4f9eaf4c96b709bc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PEBQ91608730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8602360cf9d841807446665390324a63b2cd5ec0ba6805a9d0b45cacc0de91b7. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/PEBQ91608732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ef07591772de5aa61cb0d3b7b8dff500c751466f30571f3c856049cb423a5c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PEBQ91608733.