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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88523e312dafaade698f24562842329ff76b24bcb6c7388dab17c606248bb0f1. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08f19b2c-91fa-4eda-a2fc-38f07b1aa306.json and https://artists.proofprofile.net/proofs/artist/08f19b2c-91fa-4eda-a2fc-38f07b1aa306.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcead06c89537d4a9ffe70f0198d48196b43535bf2e40ef6d0ce82dae8fe11a. 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/QT6E62512092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb316c1ffe6538aad276aeb4b1ce4306c76738ab19787b7a53ad3d32e30c308e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT6E72559974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6703c539e1a1fe514b6f1b73c74ab6a83a814a557d92e363c2515de8be26ed5. 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/QT6E72557007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a2b935949a9b256f261a705355f40e7fe2dd8a1b86fbbeb936f637571ce5e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT6E72566144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf885d5cd6e7f0cd1395c83f4fb9aecb8acfa3a34c61e29b8241d82715ff9f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT6E72559973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c22861a51e217e07d867445834709315bad2d0c31d7570954bdfca39a89b0d7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:33:44Z), 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/QT6E92567696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3fa929568a4b5f1d002a6a9ac94ebdcbe5c34bcf0678a3be495f67056268f. 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/QT6E92567695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d577ac0cddbf8ce0455744adddb722fffd9555705c58611bfd07bd11c7f887e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT6E92581402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5d463d7de7fa587793adff68a19bd4a271f6854076e51fb92b1d221dfdc0b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:04Z), 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/QT6E92567622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f987656ba9619e9358836534c260148cbeb7f0f3a6c550a516c2b6849c8bcb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:43Z), 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/QT6EB2508833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ec4f57a21618229174748281d00ea566b90b9900e493facbb87ac5e3e27b59. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT6EB2511997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b281374d45ddbd8fa9302ea6cc0ce21ebeb10a08952ef70e8328a359baf2be. 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/QT6EB2508851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc6beae4d2061871e1f665e6f3f309bb38ced34cf492697b1eee500f28b65b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:00:04Z), 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/QT6EB2508841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80564f32435bf5040c4f75d11ffd21c34d8fccbcd9df97c631416c155d7dccc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:06:18Z), 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/QT6EC2591607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56b8b85073b6712673de722997e81ea0a84c0f9f5f9a67e43ce449ef658450. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT6EC2594250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ed8884554e3ff6e3221d06f10c45e27a6c31da2e02bb28bdad69ba83ed2bae. 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/QT6EC2594248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228777fdefda1774280fe59461ddbf5b9bdde26111c41c7156f8c48b0e50dc03. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:42Z), 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/QT6EE2542314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3545b5e18c363f51f5271c03d950d7123abbc7536c213c7c035ec43ed8d29d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:30Z), 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/QT6EE2528813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c14af4a4301e78f658f38aa96c5568e9d910ae75c56044640d74361e253add0. 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/QT6EE2528807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b18a81d497d0e0aa4088b5a39230dc0293bcb47498d1e11aa4e21ed5a596287. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:35:52Z), 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/QT6EE2542316.