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 0x8a5da85b0e025f3eca8d1d7c5c6d806597dc84e5768acfc19d1fc8bed28384d3. 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/8d993041-f10b-4418-887c-239ad2fdc205.json and https://artists.proofprofile.net/proofs/artist/8d993041-f10b-4418-887c-239ad2fdc205.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 0x162e452429efd86da96cce274db799539d39017b79e24eca43d59ff267eccb59. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/USCGH1736680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ce3fe019d228ae78c1473265ae50c1ac98c547a467256da339fda1bc751e1. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USCGH1736685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a690556a852a2e5108578c2a1b3ea19dbc1114a4871d187f0ac29dfb8840eef. 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/USCGH1736688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4cfada28ec03b7e16ce378e87eae14bab2136b3f3db7f90e191293377a3594. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:54Z), 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/USCGH1736689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e925ca213ce161c15fc693ee15efb7ef0ca8176266b9fd2ba2bd6cc148504a5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USHM91800592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ba62913de4891fdbd4ed4598b443ac4b74de65d7e62ea795e0d915201b86e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM4TX2035106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefcdecb4c02827deafa8386e257ab5a69b761f3ef697e8925f63752b4c93285. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:40Z), 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/QM4TX2035108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5c586babf89836451b143ac8d57e8da71acf4f2b4872f621f1bf128bd1e3fa. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QM4TX2035112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44255f924b0a95fa4a96adc171bf0ef7cee6d7b3d7ec922c3871e4b8a4de378e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM4TX2035113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14fecc83620c29aff29a38837c1835f35a2522b56b8d7a93ed9fed494031890. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2035115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a0aa688fa5a60120255054ed464d826c0b0f295b39e38d2375f460e2f86993. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM4TX2035116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a98649021d94ff6cebc186426ae9f975d1973fd125a4e4fde44c3d4fa1edb7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:22:12Z), 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/QM4TX2035109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797223b5dd28dde34060b535161bb16ab1e7ab66cfaa4a2b4a9229e8cd6639c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMBZ92061198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93afce57e9a43cc6560558ca9c8f4d08802de3954e2618ff44b1afc90373ade. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMBZ92061199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1dee58ee1b159c3ab2c8083df783ed21044c1ba0a0408aee6c8d5b0496dbf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMBZ92061200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd7d06b1bb8bc270360a171d2ce21e623a1a0b6fa617e9c3d78b0ebec3d2d0. 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/QMBZ92061201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8848101b559f7e6323b2ef844ce064b1a47310226cae05b4253a0510dcec9291. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92061205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00834f52ddd8d600068ae1bfdd481be04abacb028d1e06d5e93ad336e6dd18ee. 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/QMBZ92061206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20a028e008ffc61cdfd58a14c055c092d99903b3ba0d2f8ed7483a524a8fa4b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92061207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1414e5360870d9f148a5d174a3d72bc4351cdce745bbe59881b8de9ae22ef. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMFME2047110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf1c97774b18dca7e6f7f24f0e6891558730f05c539babbb94e69990e3a3805. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QM4TX2248500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10769aa552210657fb9c58dbb128ea9c7eca2f0489021b53017764f3d2595437. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:37Z), 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/QM4TX2248498.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f0ed17539910851d9421a694fe94fca195aabbec0cc962da4b287a91a6418b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS2012196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297129008ffdccc3bb94ce090b37bd3c41ddc7da45b956753b413b3a24e08979. 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/USDXS2012205.