ZAF may refer to: Zinc Application Framework Zambian Air Force South Africa by ISO 3166-1 alpha-3 code Zhengzhou East railway station, China Railway telegraph code ZAF Zaf may refer to: Zaf, Ira
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 0x19248785aa63e4e3542cf9f6590197a4417cadbbd0c257af52aac73e66457410. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/613ff4a0-616f-4944-a885-5bb3a542bfba.json and https://artists.proofprofile.net/proofs/artist/613ff4a0-616f-4944-a885-5bb3a542bfba.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 0xb567d66754a50e8599e4d49ed7126b0ac4f72fe2c78295e3ab4f70b5529aded2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUYG1708995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf9125864ae64c32d94d899b4030b3403f26645ea1c88915b8427510f92fb3. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/USUYG1722678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6fa77134186dc1027eadffabcf6c8e86d5bf6d3f846a236eacb5b1a4724de. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USUYG1741443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259ef8b08222a1334adcb883049857d845759bcffd4396e800fa5a147414c154. 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/USUYG1741445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fa11bd8731d72dd2054ca9763d2f442befff8a8355015a30f206b958933326. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USUYG1741446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3946dae2a17a70797ccdd8506418b73b982c1e28aace8477ed2d85b67e84ce. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USUYG1741447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffe32194a2c6528fdd47bccdecdbd472b30753bbcea19a68b7eafb15dd20775. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USUYG1741452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3eab084a062fcb13adefd2c3d687c4b491815dec31ba4620055fe7af28986. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USUYG1741454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50530ee940b970cc860196c3e89b41bc728826c44457efc0007bf823ec5c29be. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USUYG1741455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22952ac7bd08e8e3f75619d3105a51ee326126d0f98417d5a8328c4f8d67c767. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUYG1741456.