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 0x66f04a7cf1349c768697844bc1b903e7c8c98fb1b03efb6ab55178205983d587. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96898ce2-7f44-44b7-bbfb-ebad258e3708.json and https://artists.proofprofile.net/proofs/artist/96898ce2-7f44-44b7-bbfb-ebad258e3708.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 0x81aa8ec3f649d4ecc508d59e232f88d53ad5d70523e4a1f2ac9237ccc2111709. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UK43Q2453256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb886eeb9ab4a745f616bca0a89cd91dc9c06004eca06a15c663eefbf627ff3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK43Q2496997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9898383c5bad460924d9756be9ee9995b5fc7564477d7cd40fce92f7095b8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/UK43Q2435100.
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 0xc781ca97f13b7ac314101f914ca6845417d163e07964d0957f43acdd00769d53. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UK43Q2453780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7c6aada01b90a26c4714c4f650df1551565be38425e4c6768cae4bdb5c3817. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UK43Q2463358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40610d335ae84b18e5f8577fc1a1bc349dfac85eb884fed7fe3df7ba9466ce6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZBCKG2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d702946ebf4fada5b0caf90fc489e5f3122084587a1a7ce6b9453d21f79f393. 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/ZASYN2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef5f34022948bc26b96fdbf315717eb5a9ab7cae633058130cfceb1e48edaa5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZASYN2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca33d7b1c0df7a50654506f251335e3fe0fe66c6b4b487a53097408a7cdb6063. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZASYN2300070.
Empini (feat. Mr. Kaningi, Mphoet & Khanya Greens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e078d91d3cbb0bd5eebeee8a62e6f68a5737d96fd6d73072ed704202b49870. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZA56E2306368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce0d5c3d084f2eb45a78c95523c679c757a150c12b1655f3bd5d8a964431430. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAW7B2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7f5662f8750dbdac04d5342fb35a722344b336f15d9917192d0755e8582287. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAW7B2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2965ba3da7c9b0701b39834306e5348385602cd4cf8719c9c9dbcdd3a03b2f84. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK43Q2481451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc2bcba7249d14160af363a503efc9c572ae32159328c739b818a6c38c4225d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK43Q2473615.
Isphithiphithi (feat. Mphoet, Mr. Kaningi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988b352b9667cc9ea2541f939af9428e4196b9bf778bb9c7c118d48b117cc74f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ZA56E2306359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17961132d19807042b8f03fa03698fd47f77e1237e903d0bf5fb4ddfe075efe9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ZA44F2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cac303c4951cea81b459d7416de4fa8588f53f8c739da64f29f2401b846766. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UK43Q2435557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16aaa09e5b2366b7b77ef9c4721d9f64367404840128a6d73deaa8eb3478a36. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UK43Q2462614.