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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 0xec487471cdb4117401baad6444a27f704c048a7a4d33fd1603c078f57ee00ba5. Chain 2 (Bitcoin): anchored in block 953988 (2026-06-16T18:23:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ea2872d-3221-4706-b697-e103d70df6c6.json and https://artists.proofprofile.net/proofs/artist/2ea2872d-3221-4706-b697-e103d70df6c6.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 0x73c40adc410ff03af56c4bc2bdc44113088ac8966646e88a2742f5d44f8a1e7b. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZHN62441914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf211eb983d8e13e54350d5e5850abdb196d7d92881a4bf629c3252e9bfe9d5a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZHN62441915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a62a261402478c3a09e0aa74656e2555ee41836b14fd5f8ee1779b2fcfc9bb4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN62441916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e100aeceda66dbf4c7a54536edb5ad6c6b92af07369e3f3bbe61de80371baa. 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/QZHN82456595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d60c9361696cc6c492696b4ae8d42d9aec57aadca35f8ffd65fa18ad2dcd4a0. 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/QZHN82456596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede7fab2fe50d2bf607a3998bd4d646d1f7f5913a3159494be5efaac10a9caa. 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/QZHN82456597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194f4de611f5fd0cad44b00198d3269d19dc5b03b272d7453b2d341396a8c1d0. 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/QZHN82456598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ef7a7ab325edb44d017dae88d138c63d91211e31ae6b476cb722e3165b5349. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZHN82456599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524cd7b6c96bbc77c354da83d7fdea00d52e8917a27c8feecd1f7dcf5400db44. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHN82456600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6796312e48e8c3ef2e3c02040b46b7392bc29dd45e8d119b4d792ab5b01e6232. 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/QZES72186684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbab04a1afa5167809bb29fdfbc8c1289e35baed2b338449b0ec4602349ddf4. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZES72186686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf728cb943e23b70dc8f0c1a733745b32c2cfbabd6bbe355ade8c637b71070df. 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/QZES72186687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ea60e4d2ef2ea717f9491a6cef63225f88d78a8627ffaa12d907ea5a4fdd49. 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/QZES72186688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fd56a043d3fcc1d45513632885fed48f736120628f4aac0ffad1a028229e5f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72186689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3fda5cafb74b0bb855627a394f8d8055640b6b5ec85d2ad126ed05514f77a9. 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/QZES72186690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03af282cc164511b767b20a3a3cbf091865ca6847ad8104bf2a60b2bda9ed8a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72186691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321d35b7ddba972d58165a48a671a7b8d82d905d49576db215b0c3cb52df021d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES72186692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21de208c1e15afe11531bb57b151bd2e5ac4570902dd5e4e9fada2b362efc0d0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZES72186693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2a112af409879876bded097c723b4aef9cf14a05dfbc26f7d4995ff2a00a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N1905529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f68c32a59d8cdc24e49ca5e4a279f34fd8395539cfcd7b4d3f4450477b2e1f2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWZ2205912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd7401b04c75ddc9f052a844a94b0c1a06a5b201f24b66da95cb5517512b8e. 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/QZNWZ2205913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fe1da9dc30f964f25df2a7d64954ed6e24db3a9f1bce0be6773be4ff4e79c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNWT2275830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fe1da9dc30f964f25df2a7d64954ed6e24db3a9f1bce0be6773be4ff4e79c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWT2275830.