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 0x4386f85bfb7bf431426e889a907cbeab0e8a79bc4c4b31f4cd2fff2a7d3671e6. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6da64364-b0cc-4ae8-976d-129a0fa8c696.json and https://artists.proofprofile.net/proofs/artist/6da64364-b0cc-4ae8-976d-129a0fa8c696.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 0x3cd38b20b2614836fa50dfc935a5ad6daf70f5f1cd6b91dfbd15d876fdfedeee. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWV32529288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c61f25c4eb17b2d0f3ca077c95a4d51db873aef769321d3fc192020d0bb9b7d. 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/QZWV32529290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6501e9be8ab632e80c384f367f7403218959e003f66ad6e0c4b0e1fdebdae550. 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/QZWV32529291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce94970601d37aaa482fe4e1cbb8f00a3b1d7a3ab33229464b5909b89c67c78. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWV32529294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d4f19a3c6e7cbcc2414d340647538151eedaa04cfb8693c6b19abb027043c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWV32529296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0def690f5f0a41f9884886356215c5321b0a52b9185a0da655cf0219445231. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWV32529298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3415f93fb6c8ed9e6dcc7000ebc7496ff2833a0b6fe6ccaa6010e007fbf0d2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWV32529301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57bb52185b2304e6044b885714d7f66b9cc9c7195860b6e445562f8c6eeb99e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWV32529303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7910912620a50cfff8216b3fdf0ff0f3e2a2b1aca56ec24d7697144b25e277. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWV32529305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1031e8127ae0ffb48910294bb7e0c4188e1e0619f0eeec89239cd4a781ac4bd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32529306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41ccb7f4bcb7b579aa1697c8da8a894aaf99b32a88466b48a11c29626735d55. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8B2533207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb1db084982608760cca613f45c160222604d0d8400f9ed5daf28e97deaef21. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ8B2533212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ef445284a9e5a64c9335f32671007224dff129ebd14aedf598ef96633561ce. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8B2533215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b624a0fd763c56e43c6983e11448a309fa2541b05719dd2d7e178035f033369. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8B2533216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3171aac8175272ee36c6bb41dcb23d259741745f3168ec06268a9c3bfb0b54c1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ8B2533217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bd76d8f595aec92159f22144152813534fb6b4e0e2026199e891cb060a58d8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZZ8B2533225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f84964d8cb04f45b7f3bf0f88a20de2e3425a8d600aec3f4ad773d3ca9b04a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ8B2533227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65fa8b26c90e7786c4f5f25f04c4f02cd9d354e090328bdc6e798d071161cb. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:54:43Z), 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/QZZ8B2533228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bb192ad8d586db9eeaad135a785238411469b14b341225b4a698b55991600c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:49:17Z), 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/QZZ8B2533230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0d9381a1d80c0d379116f54a486a98d0a6b2420fab4d1b9885f3cd70a474f5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:36Z), 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/QZZ8B2533231.