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 0x36879fcccf41a6f5845c1d57b4051725b4c6bbb9464d5149536e8e664df8f4de. 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/73a33a6c-356d-47d9-8047-c4755303653d.json and https://artists.proofprofile.net/proofs/artist/73a33a6c-356d-47d9-8047-c4755303653d.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 0x63488f4435e5ca5c0a18cb05ec2bb27e2c9c105f6d9be6beddc5b97ccc2755ad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACG1549859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56a82c3ae7a7406d4c0e9b6dfab6f8c7a1826c2f14b5c623a91cde5f3e794ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:08:17Z), 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/TCACG1549860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f42d62e6bf447f2cf97506f2e8b846ca146d5098f935d65aa56c2371438710f. 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/TCACG1549863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963630a1102b6cd365f9c7e67cb57593c321d63b021041c234f3ef034ca275c0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:36Z), 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/TCACG1549865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da48f8404d0777c73fd9e41a1a5172222cd77be154d961289c07c8024832042. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCACG1549867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3eed4c20a43006c7ecc21f41292a57623bcd7ebd59fc3a69829a5c43c096b7. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/TCACG1549868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e56bbc3a487c222ce1405c96a65e550d469b512e0086eafcfaaf18b16e03f2. 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/TCACG1549871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670daf3e04bf4c59d4289f8d4ec500738d4826f3a52bd5d510c522a5ce7d6ae4. 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/TCACG1549872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eaad96f34a71a44cdd35c5ceb8edf4231e7515123b8ba5fc7b704cbe370a0a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCACG1549946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab4e4ef2873720a43a9e0a38ebc9421a2a6908187c74bc46200d92058cdcf66. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCACG1549949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420d790e2769ea1fe5784dd3496e3abc005b1f97616525718417737621ca3b4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACG1549950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e1946234e27292cd6deb79bdbfc45168666856373757385e23afe3d81d35c3. 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/TCACG1549952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb174e51b612f3c3b961beb499bb91dd4e23015db0b9adb3b488f3c788f124. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:20:39Z), 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/TCACG1549953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefacc3f570e3e9c67229778fe4fdb0745c61554d779a9b277cb9f4dec4dee027. 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/TCACG1549969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7677aa2de017c6473ca1d5bf1fa57e55fd4866cbf9072f8b6c88519dcb8255. 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/TCACG1549971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161805dfcf904f09b9abc85f980488833b91696cd0a6c7f49ba85616ee88062a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCACG1549972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ad556a3004d993faa7325ebf6fdc85ad5980acc8cb8d23403a5ef556dbfc03. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACG1549974.