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 0x39ff7a99f09f09b49be243a1f363b5feed6b1762ce0d0bd4c463a2bb6a73a787. 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/cc40174a-7dc2-426f-9377-faf7b1ffa7e4.json and https://artists.proofprofile.net/proofs/artist/cc40174a-7dc2-426f-9377-faf7b1ffa7e4.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 0xbd959100e1345caf5c47850c53a9e667b72a84f7a2b33b35784ecb3a37a89f65. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZA0AN2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538e917e4c166f4f2f24ff63db32b2b2b30e6fc052aa2bbc5c9cfb06473a7a01. 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/ZBQCA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9a4bab95d29d8c306cc19d1691529195131e0e377a27cd99566d46a447f866. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA0AN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685749528476f1ff0c7e9570d98da16cc5642648090311a2d7595edf7def8b22. 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/ZA0AN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cc5221b883398b4d02a03810cd5ab8f4e477a6731bae3f7b88cf2a1ea74971. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZA0AN2400003.
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 0xc526116885608a836760f18fde242c60e443ca9616a7ddd0e40fc30be313df14. 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/DEY472475960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef54564fb77347d444746e8f82649fb61b4b92eb5c77d10e2b2c18a9cf72f6b. 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/DEY472475958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374a6955ea5da8c4dcb3bc59c23d21500dbdfac824cadc041d5e5aa7fc27034c. 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/ZBQCA2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3866b719fee9f165f4502ad472d523961cd1ee6b2758de1af7fe83a0ab89f1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZA0AN2300017.
Ekhaya (feat. Sayfar, Toby Franco, Konke, Chley, Keynote)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8012f0e021ca16030b0101e49c0ed462e87d4b52297d1d9db99062464f494f. 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/ZA8542300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecb4e94387aa63cf19bd4101c02ea539ec7ee251002f031a19a33dcf9bde1cd. 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/ZA0AN2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9746954f9b66cb8625ad61386ef9dac40166432cc1fa9f60b130a18aa54dfc8d. 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/ZA0AN2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309f40edba73fe72fca384bff4e26cdcc191c1e9b0b2a819d37b1cb92da137c. 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/ZA0AN2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d47bbc3663964d31756cdffcf3c17dc0b64898c864d0c8228c8a11bacdda95. 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/ZA0AN2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd959100e1345caf5c47850c53a9e667b72a84f7a2b33b35784ecb3a37a89f65. 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/ZA0AN2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245f63c68168ce83b3718b53cc6534dbf52e248b053e738b79470945cc05c633. 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/ZAC012201320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c202ee0474156e267b0064f5cfe9f056d4f26c1a2af8592affa392dbf6b9052. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZA56E2315415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf505111c3c0208924b041fd8420aae1cb0170bfb774bc99f9cf81574a90aa40. 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/ZA56E2315417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d95b0e66e67b7b4dc0cadcaa2aa832f5a678ce326f989f07094153f7da862c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ZA0AN2200030.