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 0xb988e157b3a35cfdfad301ec9493b0bf4af968ae02cd6a1522cb9cf369b2a9dc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5f3ff1c-db49-4162-9c8c-037a7554bdb1.json and https://artists.proofprofile.net/proofs/artist/e5f3ff1c-db49-4162-9c8c-037a7554bdb1.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 0x8e1032bbd2d02c7d0f173d0de03ca5c31bd8ddfef2910ef9dc4e67d2d44e3286. 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/ATN261303502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343f36aedb821ad3a02913aa30cc93fd61c090b4d73e67682387a86ebc90020f. 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/ATN261303503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe233f632d54aacde38ac509ff0545c3a98ebbc701dd9aefd5bb6e586698a4768. 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/ATN261303504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4603554458986efb245b52fce073d1750323054b0f0d811eccbdf8e5abd745ea. 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/ATN261303505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c356279ecb369c32a71649ce38fb376868d2ab0361a6ecaf118c5cfd023ed3. 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/ATN261303506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8398b09e0e81870d41cc55cad82fc755dbb4049b26f32b47a131641ca8c43d93. 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/ATN261303507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d36b78d3c0a2f69fdc8374680555a6d81cf53144876f13e4083a8520c760009. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATN261303510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b02f7c7d3cd492887f0dada2ca4ac1db28807da726470a0fe508305f351d50. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATN261303511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8b2ce9b6b5836095938384aca45ed47672869d03b46d82e0600bead31d372b. 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/ATN261202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43402cef0b00a4d714e06339a17bf670bf956acae7350e78266ffa60d0ef979. 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/ATN261202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef77762ec557014857cff0c22f001f2a3635c2bf5a3a4254cec1c0cdd18df4c. 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/ATN261202005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeb508c3a8cafbac1e68769f14408a9b8327a43de2295c561cf4dec73f42b96. 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/USMBR0705347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbbe82039452e0bdf48ff919bdda54731c4a816cf23ef1baf87e394cd96de4d. 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/USMBR0705348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c83e0ac06fbb9606bf42b18d15f619e08e72d386ad4d7bafb597205f5a1ec0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMBR0705349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e801cd41aee9368ca3aa5276b227b891bafb613e780b6d2ea0c316c5be60e5f. 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/USMBR0705350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d2a919242396179fb826ad0580b03e823a783dfc270d0855f2fabde77353e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USMBR0705351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fc63b815182ea54231b68118c7ec574ddf61d3792506b88dc4256dd350dff8. 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/USMBR0705352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4845c55111025e0ce9ced9f9858fc2c7f409fef8fd1c248d0a6c5cdfaef2885. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMBR0705353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af04a068c53d8115c0a99233515ae35ac4eb556bf01db30f40d902330687b82. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:10:32Z), 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/USMBR0705355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8862d02ed6b098716de5fca0de4c6447a4e157f60d6df4a30d437188f6ec7f2. 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/USMBR0705356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b140646f48f949c63fbebe6389cf53dbdaf10bb1f95d1c68b57ed665355c82. 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/USMBR0705357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0444627a51a3fa2d17f6ab77ae1b8d41c6f8af1e25608d3861c5389dc755acbf. 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/QZ8DB1700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b68e97d08980e03d678760ca81961b55a83d70ff45ba38004a5df45023efe10. 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/QZ8DB1700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d0a2676fa8d0d97babd1283766a91dcc674d36ca339af697522b0ba2aab584. 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/QZ8DB1700383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cdb97486c07e29a9d3df490631d313f46f38b68f2b70ef3397f03c6f48fea5. 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/QZ8DB1700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cdb97486c07e29a9d3df490631d313f46f38b68f2b70ef3397f03c6f48fea5. 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/QZ8DB1700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b68e97d08980e03d678760ca81961b55a83d70ff45ba38004a5df45023efe10. 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/QZ8DB1700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0444627a51a3fa2d17f6ab77ae1b8d41c6f8af1e25608d3861c5389dc755acbf. 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/QZ8DB1700382.