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 0xf53a7ca26eeca0ec3e491416d0ec13bc13a1fff4176e187334f53e876a4d2e1e. 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/d8e67780-d751-422c-8459-631c7e159e75.json and https://artists.proofprofile.net/proofs/artist/d8e67780-d751-422c-8459-631c7e159e75.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 0x32f31c15ee8b98d959fe10723885868bc114fdd3f0e0a51e6ac0795585ed870d. 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/NZFN02200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e98ec604dc76126cdb25c255f547e76fa9c53ceb2a6d6a27849feaf16c104d7. 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/NZFN02200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3cf9d5707e0d200c63b9505fe9d7813167ae2552cbc94da3187aca89149b7. 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/NZFN02200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bb1b70e0b70db04fbaa9727274e0e3dd6f21808d8e95789ccbedfbd177dc7e. 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/NZFN02200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ec4f916c039794b8baffd289a4a6117d826d868896bd61bcd234cd2bbca5a. 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/NZFN02200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281c987dbc56c32603b97596997dd63cf618b1a3aa0487fcaa1d3538385cd256. 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/NZFN02200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b017472823348df106b98587f2080dca3df6fa3a998a2542d42b2b8663daa1f. 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/NZFN02200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9fd1fbf56744ba0b4d062704623574a6e9ec2c15ece37b15a61046e550cf23. 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/NZFN02200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb21d255f5b866beda926396d23e48146fa9ea4e9cf2d395cde85d801ea2386. 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/NZFN02200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281c987dbc56c32603b97596997dd63cf618b1a3aa0487fcaa1d3538385cd256. 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/NZFN02200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3cf9d5707e0d200c63b9505fe9d7813167ae2552cbc94da3187aca89149b7. 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/NZFN02200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28869d8b652589f3e9dda3175b1476faf553e1dc42a9946f6e0d558c1bf869b5. 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/NZFN02100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1992946bcaffae95120458b7d3a5ffdc8cf19d30c5e93764d0b6058897dd90. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NZFN02100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7378932d81c489ae02982a8018cb35ffcb1ea65f0af45eb9220d679d2fe34825. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NZFN02100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6752258ce0557952bec0d3ede5f267df724e66c7eb98c8ed6611dee397e7f5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NZFN02100148.
Whakapaparanga: RadioActive.FM's Songs of Aotearoa, Vol.1