Antar may refer to: Arts and entertainment Antar (film), 2013 Indian film Antar (Rimsky-Korsakov), an 1868 symphonic suite by Nikolai Rimsky-Korsakov Antar, a 1912–1914 opera by Gabriel Dupont Antar,
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 0xf58e84844519efdd4acb32b3141135790f4d44cc6293d827bee704f318183cff. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ad7acd2-f478-4d8c-84ab-5965ff39f298.json and https://artists.proofprofile.net/proofs/artist/6ad7acd2-f478-4d8c-84ab-5965ff39f298.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 0x0addc32d10fd35c195cde8e0a17dd7aa33503ed86e41eff0b3049e746424e7df. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCACT1664912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797feb23543b64ba03971bc526fb73df9a78ab0c6bfa22d920e11e7c09f7e89. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADD1752956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821c08ccc15cb5bdd7a35832b2292fcd44e85a91f35075c759b1ae126134fa35. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCADD1752988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac557f29989f7f34fdfbf11edc2c45475ca563e85702e317a6e23d35ebac281. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCADM1858706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7a74eb29436452d8636308e43d9f39c8581cff7f40c38093c6ccc87579601a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCADM1858707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8ef71fb79c5573dc75e4d7fa827f79d4e8949b69b81b467d72e414b29b18bd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADM1858709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb8cf95879c87230ebaf74bac1ae259b64aad39df8f621ef7450d0f8b2e6cbe. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCADM1858710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bfab0146af8ab7e09420a84b67302d6b53209be4eb7a7d7b93607cbdb1b782. 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/TCAED1930725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427d1b3bec98c383b3122f3e6b1d1014d2ee1a8c606ea5fdbfb9cf11361bdeb4. 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/TCAEI1918991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23426e4de01f265055b80221ba0c5b4413e47d02b8a55b9589b30a59873d992f. 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/TCAHY2480552.