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 0x485047187213f828dc7d77575c753f4fed5d3f4eeaf592b2604960ea1fdead00. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d7c6c6d-a05a-4778-aebe-ae8dab3b66e9.json and https://artists.proofprofile.net/proofs/artist/9d7c6c6d-a05a-4778-aebe-ae8dab3b66e9.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 0x67752517f1a483f80b02738c6e4a196d4fa4f9f6a47bc52a74ff00a0719f90bd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZFYW1974707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6304f5968a980edcbfd456042f73776a67330892265f70756d0e1abb79ab18d4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:54Z), 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/QZFYW1990774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bcbb417dd6b026e91591e86f92de7b49d6a467472b9f34bfb8a2e12dc391b8. 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/QZFYW1991618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528835a49d718e4a62776f48f3e44aef893f6d29e5961b37f01250ee5079058c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYX1916801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5af55e5906d1e89cd5248ce3b198e3938d468bd40f6f99ac90d3e3719dee42. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFYX1932177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0bb9691f658b457cfcba71efd5715fad65a3370036e371b3b7083eab4ad303. 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/QZFYX1937310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3551749480731329e974680056eab0c5b7733445f6c4797650bd7840df41334c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:26:44Z), 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/QZFYY1921624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13038f842666fbbafa6e9c411c752eb41567a09ac82d5eb2eab50976210520ea. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFYY1917037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53463fd8ed497a1b9f76bb5c523f0780c6e01bc35185e9d99b2045361e6e82c8. 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/QZFZ31961454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e045f9eb03bf2915fbbea1d66d6758561b12bde07ce6de4d066ee8a6a2f7b3a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN61963808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c5695a751d16b79dfae8806b9555be16773969f72ad0911742d5bb99c45cdd. 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/QZK6Q1997736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b1312f1b622d9d97d5ea2ecd179959512b6b2d585aba97491e985a6ca0a5e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:48:22Z), 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/QZFZ62078593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03797742c4899d1e2b3765645f4c834b00b90a2ab80fff22fe25adad8a6589fb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:07Z), 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/QZHNC2042311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0bece509c687645fc1201c101fa3416f409887bf316cab1401310ba8451f53. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6J2000628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac65e1d5cd7c5605e80e95c4be9c9e89a68b49104ec2ac80e4c0997aaab7e63. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:11Z), 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/QZK6J2028975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c0c6408e261ed5b3fadbb72539695856de9cc358f3ec8ad8a014b222c0162d. 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/QZNWS2110241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e9cb3f429fdc17c07fd140a4ee2c8d7d6ca5178fc6780768328129d2c1fa32. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2281420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc007c11813d8c6ad31bac2e15aeecf5fa8665b0277d5dae92992eb991fcc4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZK6M2259632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eabff3792594e60eab4c2983c70983b4178dfa7249b188a8d7197e878f7149. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEN2361469.