Arno Carstens (born 12 March 1972) is a South African musician and fine artist. Career Arno Carstens is a fine artist and platinum selling, award-winning singer-songwriter based in Cape Town, South A
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 0xc8dae8e921fed7b08bacb58679605bfc0cce95422eb4eeac929fd33bd839aa0a. 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/cc47f930-36e0-4aea-8165-63c08acfa132.json and https://artists.proofprofile.net/proofs/artist/cc47f930-36e0-4aea-8165-63c08acfa132.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 0x52feca85fb124843b0d1c666d7328b63db683a600c9e2c0562fdcc35a1f7c8a1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAC050003366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2005920c5c1885dbeba427e91fb200f2fa6809c347c9c22f1ae8187e1f6c5d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ZAA010500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac4cbf530d5b5dd4bf822f36ea1e2321539c773cab8cd6e1a277a5f63b23eb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/GBARL0901704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde67757ffcffdfc9a51b1550fd29857af099ff9e265472a114bd57d2c248d7af. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBARL0901708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71cfe4e14df65bc56c22dc2141050c3cb82bbd908bbd1a5831d6b6c48b7b9a6. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ZAA011600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8af90f4db6018cf62728af9150ed8de277584c710a55dc7e4e9445cf6c6955. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAA011600455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4125f16d9a10bb27809b7b9c68a4148af3100cb6d18923f6728c425e7f72c6d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ZAA011600458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35246575322af3780cf7e288631d69b29fd8e6d24acb8a7e27732dddf6e92cf8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKPL2020087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039fe64d93f527b8751c651251023b1094a981af02c105093c9699acb059efac. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/GBKPL1963876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa695973333dde7f8276df77cc90fee3a6bd4da7387186953e65e6e6fe2ef2297. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBKPL2173302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de0702b5be576cfd94e3e0ae9f4d410a6e3db86e4a072e2c52294eb58ca40d9. 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/ZAC012100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d475512240ffaf94990ada9fec794257bb72ecdf015a5e9f141c281cf8dd07. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZK6L2037511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb99bedb281eb7fbf9d33b60a6ab4ac6ba045fe8b1b5f99b10c5064113cec13. 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/QZDA82086818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb49a88fab2e3d6b7d4c541bd119acb5602ad5b3f2f00affaec73bd4f9477b7c. 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/QZFZ42287749.