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 0x5d7c6928f465dfcf49329ed4b8fa4887e41de8e326a65665aff39eb265e0cbb2. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/974da3f8-46d7-406f-83ac-e6a6b14dfcaf.json and https://artists.proofprofile.net/proofs/artist/974da3f8-46d7-406f-83ac-e6a6b14dfcaf.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 0xcad019655d426a1ec20dc1855df57de9f1d8d345de4d93538cbb9cc2d1911dc8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9L2381901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35eeb0037acec22076facef032752900afd72126feb490eb04eef188f272124. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZW9L2381902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab8194400b8c00c4903abad519fa6bbef6ac3763b7ef5579db0d4020aae49e4. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZW9L2381903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fd16a57cf7ed7d7e1bf7244da138419b985f918d0e7955ef74e2d65b99a4da. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZW9L2381905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cebb5f540c17f5b9bc130a124a09bfcd35e0a617090d76e488c74371e61ee04. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9L2381906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97515407d14e9cdbd82f3e7c9b984db12f294e2846d0d750deab8c2ade423f3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9L2381907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265231d58169c2e229eb2f1db00479f2b9fbcebc3c77e7a15a42ac05ed9a67c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZW9L2381908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86183a9d5351ad2cb8ba16406d31d1389c8853b9acb7e6ed5855df1161252d20. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZW9L2381909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dfef99fee6a53c17c1a0e282a7ef5d5cca5683b34b34c01d171cb108224440. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZW9L2381904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce5f8c63716f1d31c16033345ba783daa9b13f8bb203234de5d795bc01a1b30. 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/SE6I32497397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360da5a2cd9bb63255c41cb359df34a186b0e4413ab1d1ba517e85890b95622. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6I32497398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a2220b4a9219154d8f94933e0f2c62abfae872b9cd06ce4f8d2b1b7ebcbaa4. 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/SE6I32497399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda907bc3e9a3bca5976f8431e1de566a17a69b805c1021fbd8f3c611da1c5446. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6I32497400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b18310703ffe95d5dbdcc465a0914ec562301d17377c8637c5bf1343089c724. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SE6I32497401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929c9b55d1b0e379021234ddcfb18d8183aaaaea05eb0685bdb8bdd64d1cff1c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6I32497402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac4bcfe93f84b2a797afab4d73b9cb6143840e7ea0282c6c6e2702084c95510. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6I32497403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b37a40823df5ba547d55477d41df984dee9e8ed093ba2f752ae61ae9bd3f497. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6I32497404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c716688728fd36fea9f8ff161e655bcd4ca275ccd408b706954fafb6eec63. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6I32497405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28c8474b15b25cfc1d62b0a3ea84707895562468f80899019c05bb024da3c5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6I32497406.