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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf4fae81b51324811cb32261c1b6b32faa2d0b0401ff44b7b56948c9de79c25. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1bf8235-7029-4c94-8956-112204d71221.json and https://artists.proofprofile.net/proofs/artist/a1bf8235-7029-4c94-8956-112204d71221.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd341b8c62427d0e5d8d47a25b03a3b7e904dd6c8ad1de193bdf5c325702ea6f9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN72344708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd341b8c62427d0e5d8d47a25b03a3b7e904dd6c8ad1de193bdf5c325702ea6f9. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:22:04Z), 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/QZHN72344708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dc810bbd0dc1e28d7cbf5ddd8d5d97bee0c015441ca6ea450254acbdd3cd00. 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/QZRP52390463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dc810bbd0dc1e28d7cbf5ddd8d5d97bee0c015441ca6ea450254acbdd3cd00. 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/QZRP52390463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5412bf9f3c4d03000788085c37d2161baec7e3929fd1bc2a1a25d8f538cdf4a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB22373210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46cc93db855e8d69f6f2178b43e7cc9a9d2719aacaf4cebd11368077a785cbb. 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/QZWFM2392982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf03284eadf43ca5485e659527a350050cacc1140ada18b45da03890c710729d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82445903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbe857b06123be954a07be3a2e1280a1d7930f864224f083bb41262303d1c91. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:49Z), 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/QZHN32589384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31578c0e161cea220e2bfa08bc9d90bad8521e2131b40ebe5cde2ce30e67b2e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN32589383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c0a542ba3036b7b12f74b89a06d3d1b8447cb36d1ccb62c7e60d05575ebce4. 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/QZHN32589385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9e1a9ce44f7e080fbded84c218d47cbc8c268fc1c010c4803d1f74efa61385. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN32589386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d2689aaa89d87bbfa30888b4355fdea3be8c683c9d178dc24990083c8931e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USP6L2301934.
Jesse Pungaz Vs Nasir Catriel: Semifinal - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7776c1c31214cbb69db824ed1574069db8591b277c48870f54f57d7dfe6adc. 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/USP6L2301944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3f270509936cba80768a58d0b50a924306dd3d881f96332345c2aeaf650022. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7282448142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123708a09e8ee08a07a67501618a179377ea2e892c0a7d62ebb2b0b165e959a8. 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/UYB282410248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743ec8c8377b843dc302f724aef8c2c573c496424100cb5b8f4ce4bd2caf05f2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:52:03Z), 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/SE6XW2406295.
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
Stuartinfk Vs Nasir Catriel - Octavos - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6122cca19447b264b0b138629912f63b0429bba8e9dd321d168417a91803b91. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USP6L2402858.