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 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 0x8560a51117772e2dbf0ba05530591069fb082ecc6ea9ee20f2fce716e13f7c45. 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/25b21689-fe45-4031-bd43-a121179fe2a3.json and https://artists.proofprofile.net/proofs/artist/25b21689-fe45-4031-bd43-a121179fe2a3.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 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 0xf2b936d688f64f80b72100c05595e4c283ba4b61699252942fc706337526bedf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG1656753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26013556b5936253ee04379deb50db63966a9eed1526deba5bca7e777ae9cf2b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US7VG1749718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf944e00f6c357fadde103b9c92e80bef0e6a3091fd0ea576ac351b013b707afc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG1785462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dd84e086f5d233e3b7ea822330c1a662e07b96a4ac990140a51a331866dca4. 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/QZ5AB1771836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe704f85fa90a03abac5c06ffe963831b5bd5d502aeaf1ef445d78c137a3d1a0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CZH441700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3702b4822a2a67c74cbb6beb23e2830864ced20e022eee7c70fb6686730dad. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CZH441700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68e4afa7ed60edb041e158f72bea3c1fd82a7ad4e3c5b028dfe0b86b60625ac. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CZH441700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad733aae19d624b3d351ec478318e56044ba6e37a40b3ae177936ed2ec58a26. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZH441700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f186a33addd8ffe9fa8da14fd8549c71f9dbb1bfbeabadef2461b63d8997380. 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/CZH441700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0b5386fc836873b35477346fe9f9b4c14b0451972fabe19eedb4111d3d1aa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZH441700315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1aa22b394574e830fa8813f42a965484ea7d4b4455e07c1222b72a4be0621f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CZH441700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a9aab99e24e8298bf917b34d665b289b4c32e4fab9c8ffb4524a9b25a18c30. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZH441700317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a424c7acf655a5bade474de6447e6fb0886802214e67851960af18d6d1526. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CZH441700320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd73ae0b99742763e05bcf39ae78669a5db8719eb3a734c9d02a109632c1533. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CZH441700321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16f904a849c1f20d39ce57c65bafc6c43d30cd596bea0e51f53cdd69048448d. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/CZH441700322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391950271119a732b651d668339c024454acb5a6ee5cf2870672a70de35b12aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZH441700323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df5a1477d231f3461e14520d5fc0f0e623401b4ca1d655bf8a3ca0328d9b3a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZH441800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe04282cf487ec4645352b2587a85605e5773b5331ebe67323765181a8ebbdc6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CZH441800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471c5a297d24828be8f5633c4711d7fb82a9e12879e7beb424a8b211982bbb2. 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/CZH441800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a91e254d8c32d9e9afba584ce4302a50635fd2b11bd3a22eac88cb4cf6dc86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZH441800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fafee5a20db1bb60f51044a0f609654b405a909eea83d4d3139595765719086. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZH441900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280903ab32bcc2aa8259da36702ccf23472b454050405a3e9a1ce553c38e16b. 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/CZH441900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e400df206f6366bb769dfb1ac5d495b87cb0a2cd44bd0b4552dd1526c26c83a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CZH441900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5820ca95af58519719249b8ef85e84d906cd1917737433bb121217ae3e6a20. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CZH441900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562f5353ec8a7d894b0b59afe371ff827cef67d1464eabe07c17c89df994789f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZH441900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b4a4bd0f1016ec7ae952f3dfc2834f17987f2604b91f833e7e3c1a88a82377. 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/CZH442000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e269e04c809cdbdb63c943c8c4a9424cd82b2055fe9a62925638131090fb81. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZH442000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0f78daae1716344fa75d79e457143015415c40919e0f8757c99d0083da79fd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZH442000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43273994b355ebefe1f0ba6568d469efb8f85b6de4a06e9b4bd23fdb51969ecf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZH442100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fef4753bdf240a0f16002f4acfe20a1fd7c94eb3e4f74634dfc605844cf649. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CZH442100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b114b593256b336fd784ae89fed62744d4a2af404312e7d708bc7645f49ebc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CZH442100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ff095cc64fc7523055489c34cdec4bd98b7022fed491f24b80d226f877c85. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/CZH442100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259b2656716202faaede3f796a6b1295a50495c3c7d48c06e87a646cfd641a0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CZH442200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41046ba6263a594974a79cfdd383948be35fd4b58925924542ddac368978ff4. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/CZH442200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1254fc880282109f78b143c301a9156967624d28573b65416ec742817969e5de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAII2476507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9ec8032251a1fabbf67572e4cee08f90895f9f5c5eb62d0b8cbfdb232fb26e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIS2479704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213f017a57abbb5cb1172417323155fb90e94dacec327e1e41c5d0526045e332. 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/TCAIS2479717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69533e9322b503d227a3e9e7456f1e53f9dd0b6943d294dccc846156f887417d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIS2479734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830276ced00ffa9f019592a8a0fd8ea0d6136bd3807a266e77ee4a972c30cf05. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAIS2479738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592b25918346367c58fb59ab7d1e64448761e0e7fbb0221153bc414db093ddcd. 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/TCAIS2479765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb921d5f0722959b8a132206974fbf3cb5ab6e0542ffcb9927de83b3aa7acd7. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCAIT2479771.