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 0x99ce41aca06e11eb4073df28d13be1a6cc47e5740b7803881083c7793ccd59bf. 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/d48f8829-68ff-4e95-95ac-66afdae56984.json and https://artists.proofprofile.net/proofs/artist/d48f8829-68ff-4e95-95ac-66afdae56984.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 0x15962d26261c326437a415ca2c1ff63e86157619729df35bb7585131ec8f8d86. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZW9K2349552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605caef08f5008d9a467556666a611e6e56070599fe9432a931f9e81da94cff0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTVM2394297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e5ecd21e1af7057d4709855b48c68715d560feba0013f362edb50c86b5bfae. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTVM2394298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6787b854f095e708ff3c4b58023aedacccb9825c20176e09e069643d9b648a0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTVM2394299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3950c958966ef8ce8afe98e94133d6d743cf74dd270d19edf4d56af4ddbb287. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTVM2394300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1d6c5308c9ac678ff4b77c0bb99bfc8340dd9fb13eadea82cc5c039274531. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTVM2394302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36f56a473570156fac82b6d2dc935c6b7338c203ba39434efa8ab44644ae9b8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZTVM2394303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89d059dbc83ef38e7de521d77ad90588abba9a28dc0a889b9217900de3d04eb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:21Z), 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/QZTVM2394304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a476b189ca7f48e0267f72b4ff8a15439433a2fc545ad3d85e4f1bbb47f175. 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/QZTVM2394305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ca13a2bf803191524d0b3f078ec34de67ab2631110cb90d68fb1cd6e8e052f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTVM2394306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09341175beca99b14a9828f3540155ea8a9d2a1c6652745f280606e0ef8fd4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USX9P2435949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da0b6738a6094d2f0fff908f496f039051475ce27b8a50dc2fb4fd38cf58490. 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/USDY42523918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6643d9c4b569cba938dc8712c2d9c70f9ca77e1238f9dc4e4d1a48b3b5bc6c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USDY42523919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa882a3010104b218df9216e73cd3510c980ad543bb2498d1b13f2c6922613376. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USDY42523920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc32b6b4b1fe1c5d6885005832e6ffeab94c1e1798cfae59c233c405ca04a084. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:35Z), 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/USDY42523921.