Mandar may refer to: Mandar people, a population in the province of West Sulawesi, Indonesia Mandar language, an Austronesian language spoken by the Mandar in West Sulawesi, Indonesia Mandar (given
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 0x30ecd440932514e65e337d5f843b271e8d962d73a7257b961221459a25f6d0af. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cd03f72-00e6-4e85-af2d-63985fe94fb0.json and https://artists.proofprofile.net/proofs/artist/0cd03f72-00e6-4e85-af2d-63985fe94fb0.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 0x2d6ddce36c5d0991a1c78953dc4fbcab69459251ce2d0334b11bc0a226bbdaaa. 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/QM24S1805897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b762d5482bce16614a81c21fe5f7b5812b2390491e86878dabf7c66d3df2ee. 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/DECY51180593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b3f30f64e23290408cb078ffe0580357813b44f27c76eeae2a5d81b9d0aed. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM24S1803816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf387b9b51db136d950b6837816871727799d15179e9838bb53647a5f72db168e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US3Z71750201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3de2efbf19b31793b1c97b7405f62013bd53b90dce356cafdd3dfd1ebfaacf. 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/DKK641800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50c9f011bc365aa3a8f05cc86373b039bba96717cb88e9ff283df08cf73d6bf. 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/US3Z71750301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c36ad1e7eadb479ed99bcde302ccbb3a53182cabe5bb996e24163fd4c7db6aa. 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/NLCK41044594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df778f432ded240ed3b8acaf2830d90cb4f9e1857813db053801865b441a4c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB2FT1000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fca650b6f784d5153c315877fd0fc4e15017bd0766cd86e6540fa20697b9d4d. 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/UKFSV1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb20e9ad30e052414ad3237b65144d3661816a069834f043a4f6c4ca0c54d45. 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/GBEWY0900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525fd7519f225735cf2026eb462a4ffa048719f1ba0a23185191d15c1cab63d5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBCPZ0200739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ec62b690e4daeb78b62727d3de50f503534e2c03de6dd205d758cb3a4656f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEQ201701626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c7301239c2430e48771115aab76e82604ea9146cb98307dde6fdebec37e689. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEBE71700229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683efc80e3c839d14ff29fdf8a68001e2cfebce6a4230cb9ca712188ecccd0de. 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/AUXN21703836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaabd00cec94c1473632fb20f59e07c7f85bd96cee084b40cd7ad925f6618abb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM24S1812052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27938262898e7141b73f773219a50612e1e3ad1555d05d766d0102792c165053. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM24S2004393.