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 0x28eedc2e5b8c030ae8b16a1b8496338d5fd0bb10bd7757fe911bd5559d737764. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a2e81cf-f217-4635-b398-25f23a34fb1a.json and https://artists.proofprofile.net/proofs/artist/2a2e81cf-f217-4635-b398-25f23a34fb1a.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 0x132b4ed94faf0445c8a595941c7610a0e46b530681e6dd5688f0466980985845. 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/FRPGB2426680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5a26dbbdf91c8818357b166d9ba8914f989ff3f4413840057d09182046b45f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRPGB2426690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e74e8857bbb62005cdd369d60012812ced65918015be4c6db33482bd9c1fc. 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/FRPGB2426750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363b8d83cb601d992bd4bcedbe77d553c1cd3bdad367ae8d150b92e667cc77b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FRPGB2426780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadedc7ebce031a151849bb0697c017f5a3d939d4d6e26cfec55598fad3ed739f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FRPGB2426720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e114040ec5c8c9710d8a35b76c7d54dcfdf5741aeba815878484561126ddd0. 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/FRPGB2427010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c9fc7f38341addf51ed00ab0c7ec9f69b6cff3f2f27be2e5eaeff57c7ea34. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FRPGB2426700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8991640078cb1ad84c9132166b8d43c5223bdcc22d51324330d3b583bafc0799. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRPGB2427020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d62a89c83e83898ee0ac982359e707cef330246747ff8f6f111d2e2535c7ea. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRPGB2427030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a2a60920c07a2ac138059ea061c63603eb189a2bd012ecf288e2ffff1aa295. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRPGB2426770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cedb166a07c296d42ee38f777396e2c145bb5eaa2e3b5abd1d29d3506218ac. 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/FRPGB2426760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f356a90b80aba33bc386d946b8a977f9c226deb7aceef18b8ddb54c78337df. 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/FRPGB2426820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1cd6874c26794514fd325be89e1cf5fd19d672fea13ade3a2cfd36a47cd5e8. 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/FRPGB2426710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5b3e059f3d3bf841b152ff92b8d90978870f675498b247950f8492f1cdc143. 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/FRPGB2426740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6392a8da22ce6e0894b3a2d3fbf796209cc3ce5b8c107316fc55236a70482a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FRPGB2426730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8cab50c8b781522d418b908f01fccb10c0e4101678de6e3317c85afca4f6f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRPGB2426800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d847810a3e2b1ac7c015db4d00fc51228d7b51c5f984ceab8b7559fa2c468c8. 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/FRPGB2426790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b18e594eee8cfebc93d96b3f0115d126282bb1dd65b75e5ea2be0e4ea45aea. 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/FRPGB2426830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8cab50c8b781522d418b908f01fccb10c0e4101678de6e3317c85afca4f6f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRPGB2426800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1e63c6ab0797f958231b19c31da08a1394f9135bf7e9778941b52b5ffd27c6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZWFF2316664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aba6f92b178132fa6c5078d62dfd05fbc3993ec788aed46d021cf398ee4fba. 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/FR9W12357930.