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 0xb4588101f01639994d349d0bfbebaea3946c2f1dbc0dc0a8a74346a25f54b40d. 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/f82acbb4-0414-4516-86fe-b0267ac76032.json and https://artists.proofprofile.net/proofs/artist/f82acbb4-0414-4516-86fe-b0267ac76032.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 0x4eb962551213a285c8341cdd803940957117fce8c03ab3962bcc7ae2a7e22daf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUA1D2003586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf770cbaf7d8b6982a2888a66eb7b1deea31673bce22731daeba279ee557d6a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA062202413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e858dafc3e5e59f1cf11c0d0aee3ad336abf5d1a670bf60f9747e5e3a954c29. 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/FR2X42388284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e858dafc3e5e59f1cf11c0d0aee3ad336abf5d1a670bf60f9747e5e3a954c29. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR2X42388284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9a0035ed9af0de90be405d57ba94e642ca40cbf383d6ef238368faa70bb1b. 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/FRX202352863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217969ed9378fe27a1e419e596cc7a4aab63482f50305b20931b518812621d1. 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/FRX202376913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217969ed9378fe27a1e419e596cc7a4aab63482f50305b20931b518812621d1. 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/FRX202376913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d40cfa6d8687edc7b328b2668fa42b7a90f71c1a30594a5a4833f5583b57a0. 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/FRX762386009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82baa2701ec56d1d6aaae0ac810242eb85317c713bd298e5dbbc152ea07c0e0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA082393330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82baa2701ec56d1d6aaae0ac810242eb85317c713bd298e5dbbc152ea07c0e0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA082393330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72baf261ee2cf89dad602837f2209adb5917dd0f367b830dd99ab3e1de34175f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DGA0M2322621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6adcf55ece6ccf1eb1889c18b212b7e7c5e1faf1cf467b31e22060eeb92563. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QMFMF2364895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6adcf55ece6ccf1eb1889c18b212b7e7c5e1faf1cf467b31e22060eeb92563. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMFMF2364895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766523f83bba945990532eb0f88a9cad31e5c68344b9601f2def7b03850fc79. 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/QMFMG2320305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766523f83bba945990532eb0f88a9cad31e5c68344b9601f2def7b03850fc79. 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/QMFMG2320305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d4011079b6adde1c6371df1d81fa832b6abdec3bcfa76781f003c42a7205d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/UABM12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951e901621719c2ea6b4c15cd3c42c25eb95bd68362dc0e9929c3736aec3f0ae. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QM4TX2414083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4886940596440f53d9b39e9755aa3029a58e1d097ab001eea3a8686f7547fac7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6MZ2430862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4886940596440f53d9b39e9755aa3029a58e1d097ab001eea3a8686f7547fac7. 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/QM6MZ2430862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48095bac1340d6104184031a662dadf99d72a61ebd92fa3614e30ca238e17c11. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QM6N22466477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766523f83bba945990532eb0f88a9cad31e5c68344b9601f2def7b03850fc79. 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/QMFMG2320305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6adcf55ece6ccf1eb1889c18b212b7e7c5e1faf1cf467b31e22060eeb92563. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMFMF2364895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb2412c531633ea594aa77f33641704d09e5db47e9deb390e7eff13aa06454e. 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/RUA1D2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82baa2701ec56d1d6aaae0ac810242eb85317c713bd298e5dbbc152ea07c0e0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DGA082393330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb962551213a285c8341cdd803940957117fce8c03ab3962bcc7ae2a7e22daf. 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/RUA1D2003586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48095bac1340d6104184031a662dadf99d72a61ebd92fa3614e30ca238e17c11. 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/QM6N22466477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7075cc16a0d9ffcf24a574c490ddbcbf325a273f35f71972ad600112202033fa. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM6P42569088.