Events Pre-1600 1124 – The city of Tyre falls to the Venetian Crusade after a siege of nineteen weeks. 1456 – A retrial verdict acquits Joan of Arc of heresy 25 years after her execution. 1520 – Spani
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 0x6b1baafbb236fd92a4dd31f9262cb2adc79e77cda3f332a0b66abcadf8436423. 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/b3b70151-834e-422b-a5e0-453b82654d42.json and https://artists.proofprofile.net/proofs/artist/b3b70151-834e-422b-a5e0-453b82654d42.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 0xe3d08a79610f514302a3787a500f9969063fd0a6009c919bf03f3898ce34ea63. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL1805159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11122f55eabbe58b9b898dc4949b65390509bd7ee2174a7c959c35d6954388. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMA22401235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b8e4a620ba327e3180863c086fa1751f540e09d86c8daaa8423afb85a9b3c. 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/QZFYX2478550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47075d114fa925ae935558bb9b64f3d2f38800693acc607c9151c2926ff0eccb. 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/GXBAV2342215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8941a18dcd0006523cd2b1b92cb15a51ba04e9d553b7b5ab66d1511a5b6938. 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/QZTB92311692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d543c8a37750291a3c8d71d38143e7e5bad930735d843737ced130367ec332. 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/QZTB92314342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e67f15a0601b07fa2cf07ad33d275b04daf20d9ec4ddc88b42e18373dbdbf7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SGW502362456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413167c99651e64bc46b7fef5a8646013f363f6190eeb47e88cbba61b74022e4. 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/QZNWY2389986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b1e3e0b289513c8052dd07d5ca85385c9900ded799c14f616e29195081806d. 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/SGW502311536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e4a07945b7fa3584e2418f2c49134c5c52a84be15748d2f88ead1f516c0bb6. 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/SGW502302150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37b7298a65fe96a598007b1351add26678a32e2f6129fb553d8e21858d584dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USZXT2250154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c7095170e075a5de299e6a18195e68427ad110d38798376035982588f577d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SGB502220172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b87ecf09331f94835e9de7bc710b39f1780b68d837d0825aec30fc74108b59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72164016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f5ded263262dc6bf74c8f2b0414b143d3e97ff990f707e334c51b333925e13. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFMF2125599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0320bf3665b21e5a772cee3f6bd273e05493b0854bf4164eebdf294de992037f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92192412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c32b3d322bb4337ee9c604d026d7f04f09eca7a9bda2def54e51fe50690e8b. 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/QMBZ92192413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9ace6bb39b5abe49922072b5f45d47b25c7712c07992dbd516238f4adb8937. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMBZ92192411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c71ee692af6fbae1b95ef2e7e7c4fdf4738c99196740bd4d11eded34bdd6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZQAY2176431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db3fa34f9f076ef8a00ffd5c5a1ffd46df31d8deb0149a5c25f574889b6907. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLFP2107130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8988c1148c9dc09bf413cc7c354029f22626a36db43d66ff5ad428a13367c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKXN21919789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83af335b0c69679b491f5dccdaae215d29dd070920b89088ea922cce335345a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2096430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c78c66e190d5b5517d3916f29c44a2d15b2057c883a63475dccbfd9fb6d8bc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ2008690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb882d7257f1395fabd9e78efcc9e23cafeb2981bbff3c7ea14501e519602bb25. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2090309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ed965f3c8c0cf780921cc8371a496ee0a3853de708c5fb68293c0e9eda0985. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL1978288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e91f3078e41f1281587c9895a298a2485b6ee1a6a983d2654f7d59a8efa9d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL1959973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204aee087d7e163f35abc39034304c1238c9eb5fcca821ca9a8d2684962d800a. 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/GBKPL1945134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb211777d8720616a6f12f8e16b1292ed0beaa9e3825621e2f9a69a86bb86ef. 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/GBKPL1811259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43033ebcff471ce4f24c4477b37b89f1ccbdaf77be04226bab870eb1371f3b1. 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/GBKPL1948766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb53bb987adaa20bff91cb8a0b172de0e279521e13b33bc6595c647f25a77f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL1899074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5478196140a32a8df81405967cae482b8d785ecf5354e854a36f617dc909c021. 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/GBKPL1788875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11122f55eabbe58b9b898dc4949b65390509bd7ee2174a7c959c35d6954388. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMA22401235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5087c87c810c28ad460a59acec72bf4fad244f797a80c898eec963a3eb6229e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA22452158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89a72b8a133c5ab1a73425a6711c44d13c76b71bac88147907a0cf625f805f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ROROT2403980.