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 0x71d7a5d55532bd7aae177b4364c6b51b7b257cd50006fb1cb6a110f9156ad816. 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/d7f6a239-a080-419a-87ef-8145e16956bc.json and https://artists.proofprofile.net/proofs/artist/d7f6a239-a080-419a-87ef-8145e16956bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sifanelene (feat. Agzo, Lucky Keyz, Dinho & Optimistic Music ZA)
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 0xe2efbc10e9e8a6c2e56d802d1127c76137a54cd827145149e9086c7ce0797c16. 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/ZAVPA2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d559b05b069137c141071d70405abb111177e69fc117cbf878c435fa4fb3df8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA56E2420009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1704610f3f01040b3e0a5febfd11c0b008e7887a1a94c114f56d7cd385d965. 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/ZA56E2420005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d559b05b069137c141071d70405abb111177e69fc117cbf878c435fa4fb3df8. 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/ZA56E2420009.
Nkalakatha (feat. Chley, Tumza D'kota & A'gzo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45070bf4ccd840ca5eb9e333ff0f5414a70a111951bc9fc6e3fe250b948cf5b. 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/ZA40S2401808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e0bc78b9f1fea8a2f9eb40a25feac4836addf87b0f54a8f86f47a73df7ba9b. 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/US23A1585909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2efbc10e9e8a6c2e56d802d1127c76137a54cd827145149e9086c7ce0797c16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAVPA2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0804ef7e736bc082d6d6d636308102a15853321fb8d1210bca855bc1de996b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAVPA2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442def9c3bf529fafc7c0a5c4168161e1c3ce1d8cbd970773723f0f287afb6b. 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/ZAVPA2400104.
Mixara (feat. Snow Deep, Dinho, Abidoza & Ag'zo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a742b52804464ec812f5985cbbbdfddd41d0a2b1a030a50aea7ef70ddcaf5a. 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/ZAVPA2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf07a2770008618b1c62d509aa5f2ca83b94d2488bb243206c44b032c836899. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SE6HN2309212.
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 0x8628e31469d32b885c15970c5854d3f7a6b667b1ee7864481391d36a4eca06e3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZAC012300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024fe29354edfa5e78b5c367aec05bb890e87d57050a8c6ab78da3ae6c420eaa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAC012300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63091b4265b07ff0f235f48e89bb3391060570e75a9d9270dad4efbffee673b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ZA56E2420006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18cf2b9b456683c43b3671cdb254311713f81a6a6c2bcad938ffdab75dbb6ee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZA56E2420008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f471054fe3cae704d2b8ef626027edf4902d16da3c536fffad9438a8ee06043. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ZA56E2420010.