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 0x7856ea32e9d10d4cad63f88bcd1bf0410002f4c7d55f9f552e2a56b7a1358471. 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/56f984f7-4df9-4e62-9fa3-19646442f628.json and https://artists.proofprofile.net/proofs/artist/56f984f7-4df9-4e62-9fa3-19646442f628.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 0x5ce4f7e5764c011b07c607310ed050ad052288395a4acd1ecb8db76fe8f27df5. 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/CAENV1914559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d8969c21db9beda6f583482b4a37140901c0beda5c8bed11a203a6db25b80. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CAGOO1965803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89af7f686541801a00e0e3ede85d0b6ba19fb047b2861bb4497f64965a2b385. 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/CAGOO2006716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd54790e1f89544e9028a0d24b4d0647b783a894218e1153a6b7a42615b90e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/CAGOO2019509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76224b96b48f5513ed8760fa8961c2d599281acd2cde6bccc17de1e4048b5760. 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/CAENV2128942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8ca7d709ce884682434dc13640eb2773c134a1fddf2675bfa0acc6c52da460. 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/CAENV2138053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae061d7a526f263714459c5c561ba76be4618e3555db6fe0ea6395da4101dcca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAENV2138054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d981e8dfe67c434c1717d1e6e718b3582ec629d91bc5ad977b07cb9ddc080d6. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/CAENV2153665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aeb5c715cb8eb4f6e73310eadc400c62256cd033004978572c150390d1c15d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CAGOO2111768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc712c1e17aa046b2d248e790ec3d1a19bab53ebd5e3f1aaf481b2359fd2c2e21. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAGOO2122790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2317587268920190a11109a35e7467f3c9853e1a6cdc29a54a36437fdce97963. 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/CAGOO2125878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41083018ea171d1ba0b279d983d02de44676b6401f68b668952b98fa8febb578. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAGOO2172245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a065644b0680bba7ace115be94a3f48b939cf399d26f32b0948903e2581354. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CAGOO2172247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66588eda55e3d79a0826e7f82b9d0b9bb7d5f4ffd465185ca7e388e4cd2febe. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CAGOO2172255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc3786330dd8ff924882ed088c5117fd84ed87c75b426e537359c38c4a35b4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CACWV2134702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3972c081b03853222fd2ab24064bdaa13d04a65f28b19f1c61307a3a914d3837. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CACWV2132312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698cfd06a200c51715b17b07805ee744e29c8dbf9e08da4a4894fb6577a24be. 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/CACWV2231021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fa06ee77fc3a318b5b7dd177ec9de8123f004200f639a1db4e2acf0dd2cd5a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CACWV2241697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53ef592ac32e99057ab436215c7e2895bc6a46e86272087fa7773a3872216fb. 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/CACWV2267868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ac739b44fe1a667f8e8b2afa199a29ab0c56ccea3a163c99b55b647fcc178. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CACWV2267873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6fd7e0e51728f2ad0277e17145a7a289c2c2f5f0a1ec3b370488f43a87e98. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/CAENV2209557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff39ea91a564747578bf2988f058a65430cf5c40a8c981d640cc1434b8d98a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CAHQJ2387713.