Chief may refer to: Title or rank Military and law enforcement Chief master sergeant, the ninth, and highest, enlisted rank in the U.S. Air Force and U.S. Space Force Chief of police, the hea
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 0x18d69079face9985f33806818845c8d7b3f52c1b7470e30644e5e2e9e95ca012. 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/b3fce0c3-4dc1-4b83-8b30-17cff05b95b2.json and https://artists.proofprofile.net/proofs/artist/b3fce0c3-4dc1-4b83-8b30-17cff05b95b2.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 0x1a7beae33665584795b676106a17777a53d7fb53df4a78c101ea5209fc693744. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM2PV1893448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974bce6c9965473a1a3f422cdafed9b932c225b3174c05edd5fb403e28f045e5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZES81938883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6583f7e59270e4782d3ea31a8c831396166880d2387932edfab17b003aa0c24d. 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/QZFYZ2097930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0fc97fd73e8bbc1d1c73461cd10fd28226dab7a6e2f1f7b3595dcdf897ad0. 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/QZNWU2044793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1669ad20318ec6b2db4659a23aedbfad96d273df28afbbb489c0db7899568c1e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA62171079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01613d7b0ed3105659dd5d926d4a45426db526e8a1d9d269e70ff48d1eaf625b. 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/QZDA62171080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fa28b5adf23eab0579289993794759e517ca4fed37a512493815825bb2482. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6J2101645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23689a126cac60391c668ce2869d6a8546951c3c7bded0d4c136688e9849268. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZDA42286031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf55dcebac458d6552dc176e4ae932ca90f54384db40ebb5ff4e8e1a31704495. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES92215209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8777108ec8dfdf2e7aa30ee38f3f9ab3d3b177510f1241beb09cca99a757e7d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZES92215210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2b191f40d257580e81181f3a120767fd4de8513dedf1d8e03dcd10bf7b125d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92215211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11349599447e1f09d5f9ac7c5188618bfd2c1846281bdb351e268a451fe16dd9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZES92215212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217a35b0a0abe8c8cf96636e20bbafe6da2518319c8cccd45a1f2401f61d4b3. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZTB42343070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a509420de28641ff2a35152a191f325f25caed663091a9a00f4c4fa5da8dfa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB42343066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3a9064a32c309cf4e57d7a40d87394d1cd29f4ff1f1d29f9ff453c34c77b5d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWT2316955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b005beb1dc4ac7d8593a90bf02aeeba50932d9db71ba8a6dd3c8bc905989540. 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/QZTAY2399399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217a35b0a0abe8c8cf96636e20bbafe6da2518319c8cccd45a1f2401f61d4b3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTB42343070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16a0cb8070aebe0923755cedbfb23cc88a99e779504c0c5e429a74c707c7ebe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USYFZ2408316.