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 0x7ba32f615fbe9b5227e1494888ef2abff72f9afea38334ba2496b294577a6940. 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/51f40b95-2370-47f0-a460-9568a3217f59.json and https://artists.proofprofile.net/proofs/artist/51f40b95-2370-47f0-a460-9568a3217f59.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 0x6f9b99a7535b6b63d3fe7409b1b272070a840873908d9f35133cf39f595533d8. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHN62254028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2811cbf63a4708c866e78c57c80835dcfd2b8fdb3dcf22fd3127f7ac2020d6. 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/QZK6F2203553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f94c906492a78fed3a8e0b8a224d444874db732b875eb788a966da4516a662. 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/QZTAT2212883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b52a6c7535d1aade8d4cc03b40b22331bd86fb34de4327ec16230ac553b26. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZFYZ2397199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f404550ee2da711134ef56c71c126f21c14185401ba013697c97d8112cd3d1. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZWFH2394417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f66b649f3674b729a794eb71cc8544cef07bf34a3b3b3245f5db933cd2eb5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZES72234632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae36a11129b02de35c602d13a2fcc38c3e66830fbe12a4acde1616decc750420. 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/QZHN72435007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66556efb9ed2d21ed36355c6221b1b70552b83404e5f7a0f2a90dabb0c7527b. 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/QZNWX2433184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef2f09c6c3fe8c0cf0d291413010f3ed281b376ffb74516c6a03fb34c06e06. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAY2423771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb060f00daf4e7cf7a5c60b90f84305de7617ebeb77ff2bf4f91a6b9d438789b9. 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/QZWFH2476545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7ad4e44aac3569b2d9eb39c3c4a77ac2b34d40ec4632c2e99c7cf5a95e87b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZS7J2446515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb131684e3ff71bdfb46ffc57b0e647321fd2f5ca6946a996fd45255d876fee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:05Z), 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/QZS7J2467175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854620030fdcc2880d40c4c153a59ba2471ab47bf038a55f4b365c3cde4d08ce. 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/QZS7J2436737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1168310c910a381d902d9cc3c25714c363b55f1d418f7c012e9e2c92c0cfb373. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZS7J2419962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e782c23eb4ee013617606d87f9f703f3ddc6499e81d3752a44f1576ad9891c7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:37Z), 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/QZSYP2446641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a956cdd24b116c0c14d1629dcdaf0d2dc58da9d57a35c7a02b7ad264df1de. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZSYP2476916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb848b427302787d9b6db144390332259c87f0b9c0756c28f859349dfcd187197. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZS7J2515969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c1a346a99efc681475c446b9d1bf2a2b482454febae07bb5a18734f4e16848. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPEW2451431.