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 0x727043b198650c6cef34a40683ee1624365eccd71d8bfee63c5c2ea4efb5ba56. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3a2beb0-b093-415c-9065-4b8eea483a80.json and https://artists.proofprofile.net/proofs/artist/f3a2beb0-b093-415c-9065-4b8eea483a80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ipi Ntombi (Original Cast Recording) [Remastered]
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 0x3b09efac908f7c85cd41b6ceac9f3011c66605da403b4406c9f6652084581de4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ZA95S1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd045d0a63f948e33dc9b3d3b0aa3bc11cd7088677b1fc5e60178ea3e1bc712. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZA95S1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4749ead18bf8622d6e41ddf936a40368bc0e500eb613632afa92849efd083e30. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ZA95S1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22278595b36f34330f5338e04a548cb0ed4b22c3480c09799ba362e33a05f43. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/ZA95S1400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4231d109b1e67668ecaef5ad263b22ec77ecde516f0e2da002a0d0b6bc517a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZA95S1400034.
Bertha Egnos & Gail Lakier's "Ipi Ntombi" - The African Music Celebration (feat. Mfana Hlophe & Velaphi Mnisi)