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 0x882faf29c78fe6a84a8dd8568d46f8f2260040f614e04cabe8da6adf89b0042f. 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/97d832b7-2fc2-4985-9e61-b344e06c80cc.json and https://artists.proofprofile.net/proofs/artist/97d832b7-2fc2-4985-9e61-b344e06c80cc.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 0xfd55df0cc93f9f52b9be6ec8a31252a86cd490aa5c02cdff111230e15eed6905. 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/TCAEG1999500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f1bc14d27555afb46a95421800e5ee903e44648a56e7e56670331a708baee8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QM7282038168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8294e8dbe7117b801ccd3aee49d216826089d27ab3c5cc48f385a9c1845c411. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QM6MZ2056375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c56dec7a2b32aa9abb185e63b040e4bd9618751ba64b1c6bb44c4477c9ebdb3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QMBZ92089215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e4439762b431a3a09cc899a732b6befc1ada6824892b9f4743f52ff443f338. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMBZ92092040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ae2aa54d4faa7102619484d0c499eeed6fbe38905013534d964e42edbb842f. 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/QMBZ92089217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb277bc44925b56de0dbaea4d8acbbdd656a6bfadd3bee2430899713653d384. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMBZ92089219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059ef3f9873db973232694ae32aebbf72625b15792446b9f437d363930cc73b0. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QMFME2153575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059ef3f9873db973232694ae32aebbf72625b15792446b9f437d363930cc73b0. 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/QMFME2153575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c142272b35523b16d2215550a7f79deba2d4c400d7e3f5804d97b8dac02123. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMFME2174799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50421cee7524aa632da99311ccbacd72a633659924167d99bd3d78223d245a29. 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/QMBZ92178455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f451beac6104f0690274b179f30cc5ae7bd87ba9f3268f6ae4fdb1f4d39870. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QMFME2174798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0289f40cc510f99b46b639805322942a424e090f232a8f58ecb9569b90d02f1a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QMFME2174802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90cd264edecc2347e6cc289d36895e363f3340f01a474a7c5956a7970f42d8. 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/QMFME2174803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230782de944176f32859c4169795ac30b38d74e1bb7251d214047a473f19227b. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZRP52402766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd56d1efa792ec05dac2f17cd539202f82352b281e96418e439faa590ae1f2. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/USANG2435686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b39f284a96f322cdd3b0341ff9aaade48e26532b98c5d929e527e2521671b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USANG2460737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5e33fc527b87a81f58d62d7ed8191b0c6d04bc3684ddaebc078992e9cead07. 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/QM4TW2214842.