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 0x590c9d3b64b4ccf4cb063d6345f1da90dd817808d8af5c166f7bc8c196e903bc. 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/bee0164a-1f24-4fea-b09a-7f3a573294f7.json and https://artists.proofprofile.net/proofs/artist/bee0164a-1f24-4fea-b09a-7f3a573294f7.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 0xf85616f01f602d0e31e80c2e0da62c4a3a4cc2fb58d745f37a294a939b5ee7cd. 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/QZMER2035872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9e07aac337b2e61fc35ea9498dd88b935c3499b4ff314dc8bcfc2d41dc199. 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/QZES52170787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79100019f8efad752e7471c8d72b932dfe8899b6d2c87b5a246171b2fc773d22. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZES52170788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb024f829e66e45e78461496b1ebb7650ddf715448833b373a0a39e1034c097. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZES52170789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe214e07b2c3e93654478f0954b03f9654816b2d78405df5007458fefdeb2c595. 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/QZES52170790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2550a4527a9ae7277f8ca2f527623efcd5963e734cbadef9fbfabebc0d3c313. 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/QZES52170791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb597cc15d46a019ee9957c086ad2266d5ce02330b515083e7254985ea5deb2b. 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/QZES52170792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d30a1fb88ca74fcfd0204d590619b1bff82179ef48e2d251ed3ca03e27821. 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/QZES52170793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee12d8461b63ef9e9937428159d580255bd22b215c15bf780f04597b2363b6c. 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/QZK6M2263605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404a4d28fe9df12ceb76c52d605abc898e98cde6874f0a00686cd6120ac0461. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZK6M2263606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86eedbbb9903e38ed2918fbc8402cc31804771603cceedb5558e426933050b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZK6M2263607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44b894555257d4d7fc4d64946ac5e73345b745ca310eb201e484da8de323b65. 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/QZK6M2263608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119319b88436ffd7307e0df4b38a7faa673df5941af77fd4f5e0dd1a9a766526. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZK6M2263609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8536d5ad9902e04c6727e624eb1778de1ac458f84e9001d887c9dab3d2075a85. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZK6M2263610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf003f97f09033ddcb498e38a58abfd51d30ccba449fb21ddeed7e68d103333a7. 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/QZK6M2263611.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4e6802496c6a89f7a263c05b6df847dcd3d5baabe05c685b268850b04fa6ff. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6M2263612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45262cc5aa40d21d5b3e6d700cf43645e9f0981d5317ec7d60283763bc959169. 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/QZFZ22393175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8627bdbb892246a80f765e734b85bb25ec4a1c924b57809c66750a2aa41faf7b. 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/QZFZ22393176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa168797d48e9ffa81c7aba05986d536ddd1e81652462f25be1abf6bf218a7af. 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/QZFZ22393177.