Ka Hao is a New Zealand youth choir that formed in 2019. Coming from the Gisborne District, the group performs music in the Māori language. In 2020 the group won the Mana Reo Award at the 2020 Aotearo
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 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 0x503053e09131c46c73585cba75ba4f3ae00e5aa3e2d476304bad10b67ce1df27. 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/5c54781f-b768-489f-8a9c-0d7950a3eae4.json and https://artists.proofprofile.net/proofs/artist/5c54781f-b768-489f-8a9c-0d7950a3eae4.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 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 0xfcf1d53886e32f8cc19888030114cf1f96f6a32a37dbca912ae53f056c0aa372. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NZAM02102791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959f81bc96d2cd33478c76e904e8cb4c72f1175feca9d05e1e682a766a1491d7. 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/NZID02100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c935d5679318906f6140d62e31418c0d488e6763c511eceb5f0bfadfd0bf5a2. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/NZID02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e5347c980b7838a04767acccfd4305085a9155ff2a90547c321353177c50af. 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/NZID02100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2264eb10ee3c1b99a20e062ac314e0142b892935d885d4fe2e99ba248c43d52. 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/NZID02100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab00e1d01fb226f5e4e27c7719bbd1594af960b8d586892254958098b70b1e6. 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/NZID02100005.
Lost In The Q (The Weekend) (feat. Jhaymeān)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28a34ab966404ddea1117f5300b8fd328d6eea8f0c82c5d7af5a0449b1be9e1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/NZID02100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbd1d6d6bb6cf2245c8b8aaff61aab6487e9434ae36b72f190558e9a4ae0e84. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NZID02100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c88a794dfb7524430ccd71f52ec7ab09bad71a57aa6aaa144841a5d1c963a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NZID02100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b370eb1d74c55a047e19f407ad9bb87253ad0987218068ef40c36fe6d31eac. 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/NZID02100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc77406a6be2db887ffad35eb5bb362ed6073d4b91024256b727a3277152b745. 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/NZID02100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e81131a0d907acc55c05778e7ae1c0dfe54085b0543ec0475e49c2cf220ec. 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/NZID02100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f0f3cc1758ef5ad6399fd39c7a385699b2a335fe4700146f9a435c8b414bb0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NZID02100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc5ee402fbe409c4a8872a3a3d1ba3b221c773b080e7b1345cc0ecbc9090c0c. 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/NZID02200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b370eb1d74c55a047e19f407ad9bb87253ad0987218068ef40c36fe6d31eac. 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/NZID02100009.