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 0xa457f23cd87d6b54271e7873d4660c58fdd5ea81daa49326a7b0647902c58664. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a59f2d66-f7cd-4595-852a-7c7e4d8da9f7.json and https://artists.proofprofile.net/proofs/artist/a59f2d66-f7cd-4595-852a-7c7e4d8da9f7.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 0xd73031fb5f3194cbc3df4463535c201c947a2cad17d8f90e2d125b92686e3ae2. 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/NL4DU2000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f049ceafb9b9622eb8bf88d65cbec32759afeda185490b39eed6a443b345a2e. 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/NL4DU2000233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8ec18cfa8dee4102ce257d84d2ef0b0c03bc29f84f2b444e516bd55c3c4505. 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/NL4DU2000234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf659cdd1d6709369b96dda4ba8147da5991f75cf1ef01c75ec066e24e3494b4f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NL4DU2000230.
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 0x4fbff13927b12deac663107ac1798cd169953b074e3a827d61fcef4d88de0bb0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NL4DU2000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcd2fd18af80120d294b13c649906d6b4e8f84446eca153621b29f4c0c8acd9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZES62501436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50f7bdd1d546687a4160f6cdd71ff541be5eb601a7a95558064c3682adc309c. 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/QZHNC2567544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f5c9375a518ca7f3010b5cf9ab1676e2b99fbc0e73418086143188cd2893fb. 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/QZHNC2567545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240dc845745385cbafb819731c71d9c6508df8a40bd419619b31e66450cfbd6c. 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/QZHNC2567546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9886eb629164140ac598c9ef4d63b7bbe14b64e78003d84b777e711967ec44. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNC2567547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a021189065fc23f93bc6994749e47c0b5c71a298fd85c5ea31ac01fdc9a56. 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/QZHNC2567548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522def5ccf77e45fb5cacb5ed44f0a8c36a32fe765d6f1229046a20ca24695f0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:29Z), 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/QZWFE2582878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e897b9e0e1670eea9cbfb9526a51bb18e30eaef2099313c179123ef371235c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:07:19Z), 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/QZWFE2582879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ec78f3e098e5eb8891f511d8a4b2b3ac3ca0b2bfdc3b89f0a788a46edd0957. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZWFE2582880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c1c10ac358f619b6b6aecc8da6e1cfa1116a8b4c37b961336e1890504c964f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2582881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b822f410dd915e1eb31f37bbc63d974f38000d19538eff881415a7e7fcff65a. 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/QZK6L2253159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c771cf064f4596cc40ce84c2f1904958e9d304bb255208f580240bb44b0d3. 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/NL4DU2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0b9f0fc3a2a9d0d14aca8ded3d3e4b98958044842114155c3fa1246dbe98d1. 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/NL4DU2000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9100453d42dec46974918f2e917035e1769b2165bd863b1c810c9adcb6ffbe. 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/NL4DU2000472.
SLENTER CITY VOL 1: GEEN VRETEN IS GEEN VREDE (HOSTED BY MOCABZ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a29e7333e97f4cdc45f4b50ca6b7b9378201e9a6448c743f5a45b1b2324220. 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/NL4DU2000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7d4b410d3cd4a1265a3d1cd0769c2a076ae653322a9dfc142c474650adf83. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NL4DU2000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7a6887f793817419ba3c6e12b39812ddd1797a118e96ed8950c3ae62024d92. 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/NL4DU2000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe714664b9207abeeb073c1902e82d29a756259b9a93bd3448fd806866ae2f30d. 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/NL4DU2000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31cd76b5b0323a48d4e952bf0f82ddf177a16f28f75773b23cc4857a4bf9c5. 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/NL4DU2000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3650fcabdf1530c885eea6c4f7f298eb3b7482445a74afcb82766ddb9b42669a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NL4DU2000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb30f3d3af0a56ab3e88766125d1fa44a31a103ff0cae4b851a2552221cf979c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/NL4DU2000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66afab01efbfba02f1cb6ae68dab474a7d2318e1ac8a4636f3be07f398588f28. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NL4DU2000455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fb9a4bd85c936604656e3f7415ed3526462ffc279b9f4101990efc695f2785. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NL4DU2000329.