Arz or ARZ may refer to: Places Arz (river), in Brittany, France Île-d'Arz, an archipelago in Brittany, France Cedars of God, a forest in Lebanon Sport Arizona Cardinals Arizona Diamondback
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 0xb25bf88c135993855c8cd485b9e007ecc9c62b2534e12c760e728cc59fd8987f. 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/e38935ba-6708-42d6-a942-a92869170b38.json and https://artists.proofprofile.net/proofs/artist/e38935ba-6708-42d6-a942-a92869170b38.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 0x43d5b14131540f6f490471ce29e408c931d8d1df8acca185b2eee9ed60c2d7eb. 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/GB2DY2200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ad35373efe5a76b1a7992affa7bc258911dee8cdbdfe902f562ce585372e3. 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/GB45A2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38f2cab49696dd54d08ace010837271c0a0004950c0ed7021852e4def2593b8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB45A2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3d6cf4af16862001ed3c7ff8d47e9db3c38219009fd06c56ec5fd79131eb5. 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/GB45A2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9118e976f7c5f8181cd1436e0bdda3e26ffd2bba97c0e3959f15517b05b48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB45A2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ad35373efe5a76b1a7992affa7bc258911dee8cdbdfe902f562ce585372e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB45A2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf63e4fb7ff687efb3ba1d0d2f91c84b93a0f404087aab081d79f16329bc63ec. 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/GB45A2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc76609384be4c3ce1dd98211a7b6d2b1ceca73a29b3f6cc0461d2edc7926e4. 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/GB45A2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493ac1b21a9dc835fe70dcf7fd8b68c9a2f883057675fdcba8d0dbbe34ff3e6. 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/GB45A2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7c1f3e153a18c9ef630f33e2ee45308546a91c099455e092ec9a9bf2778de5. 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/GB45A2400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98bac7d785fa511591cc6e545470a85a064c4bc77079e0ad19f09e7bfaad6e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA082293006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb877d1fbca8b3a9508e3c6dcbb6054bc7272ee84969e9b9f08429f65034ffd75. 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/AUWA02300942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7148b5824e54273aabd3581ffccf384a6aae063e194ca7e6f24c0c787ccfed2. 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/QZJ842004104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f08bd2785fa6936d6b36581bc50241f6da5f714f892f67326c84a5b579e2c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DELV42201438.