REDIRECT Glossary of engineering: M–Z#Middle-out
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 0x8a6e1179ac8c272551b0bbc46b5eee9487a097c04c376b530badfdd105768bff. 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/746d095a-f866-4221-9eb8-e15946ae6795.json and https://artists.proofprofile.net/proofs/artist/746d095a-f866-4221-9eb8-e15946ae6795.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 0xbadd360e7f1acee3f71dbc40666114a6c776c3d55715d19526b6f5ec21a7d37a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHN42498145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d8f53f0929d53e273470d30303e421bae127195b1b2a05821f90bb1996529. 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/QZHN42498146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6133bc7d6a15b82cda2bcec053fdc3c752f9d62fa09e04c0837deeccdd52676e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHN42498147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd208786f97fb0b8ed5ed59dcf27af808522bbb1b42cfab3075196f09087e99cc. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZHN32476660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbb9b4daacd81aa069c99f9c8409617084a35491c5a8e2786c7b48a621cebbe. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFYY2469955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66993ea72b052a0a47b701dc7e85a565e27407e2b2c302099a6cf8a32017086a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN42498148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aca98976338fb90f91e84aaa95ec2fb02bf57a8577eaa44bae217a677b55fc9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN42453324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a46b43bf48a8977d4ac1e7c90ae73705dc43c8b703efa48817d1669852ba888. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHN42498149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfe90cf93b2f541e02731d32f45345bcb13d50d4d485d1840cf146b56bbdb54. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHN42498150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac045b6d6ff5d640d27e0c60f1b34c25e6d828858eb1540fc0d21370bee75156. 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/QZHN42498151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eb22188b92c756ff44276444c0f0e54da3d082536b73fa4181933cae0c50e5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN42498152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787863d0fcf1e2428b9a691124b4554c45ff540c2be93de354a5e26fe47b3557. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHN42498153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aca98976338fb90f91e84aaa95ec2fb02bf57a8577eaa44bae217a677b55fc9. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZHN42453324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbb9b4daacd81aa069c99f9c8409617084a35491c5a8e2786c7b48a621cebbe. 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/QZFYY2469955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0103755e7012bebc16a007ac86708373894bfdad3cbccb1ff1117d31e6a9d227. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USHM82232522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605344eb404bfa5e4849a2c3abbad164c28ff249324f4b1c7bf57c52ca4ac1f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82232523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440b50946cea689980f77f0aac10f4d7141ba0bc5a6a3bc80d285c20d3122f21. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM82232524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c95694df7eeb6e4345980f902946cd6098bb43fd7bef6f60b65941b1ec1f10a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82232526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bac6404b036a91656848289df5c79baefc2be90b143b7506037a9912e7eb11. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82232527.