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 0xa967a62f97581df39376f0b4c846d3a6d2c4513fb6d4439735745d8da7927337. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/469bc509-3217-4142-8236-a9722c51f2ca.json and https://artists.proofprofile.net/proofs/artist/469bc509-3217-4142-8236-a9722c51f2ca.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 0x517a6e1c3b4490287123c3c3d7bcc159bbbc8de2c74b91fe208eeef2c98a2db9. 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/DEC160200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf23a4a2394bfdbb1851bb87d1afcc394cc275f4021817959cc65bd93fe8926b. 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/DEC160200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9428bcd7feaa1b2bb61bb7af1747e81235c830cdf7bfac8a083d4a913fc4a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEC160200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb74232087192e8caa609a0ac4e8d744e8d08ee4da16e7e04bb41b37121ca5ca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEC160200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db3439a3b739ca998601b9f949be5b0164be97695e1ee15b5ad5fe8175e1805. 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/DEC160200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2d2cb27eb331ef91e7a3a7ad81ba7d96f2567270ff6ea4b03fce2943b7e726. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEC160200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4a8989b87778ecf49438600a8f684030912168d0a58639a8370f2b23dfe02. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/DEC160000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85174a46423b0bd11b65f665f41b88f29b8beb31d1508df1ad3acfd5b91b90c7. 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/DEC160000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b24f22261bf4738aeb8448e37408b783778f33dbf8b55ee674a6ad43854c7c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEC160000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dfe08dbcaf2647734f16a59c122abdf6220edba076c38bc105efafb1b70ac2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEZ651206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dfbdfcb0ff5f19137908250ef1a804003c4b146dea5392fb1922f474f65df7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEZ651206142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d79cff30b83a1bfe208f0af85a1e832063580c5cb359f12f9ef182fc2890302. 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/DEZ651206143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7f801c67cac09aba42557ba917604f11c11ef89e8b295dd2a58738f48e06ff. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEZ651206144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1be9e021231ddf984b39083fbeba7955221fb0ca9c51133d26100145a60b978. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEZ651206148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f3055980f0ab743fd0c39b639a4ad6f7fb925c22f805ef06ad601c690c09e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:07:29Z), 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/DEZ651206149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d3a7c63a360a1219f4536fe50fa07320b1ee4405f4ef4b7781d85e6b11c5e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:39:27Z), 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/DEZ651206151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd144ee2777d2ecab21594e7cbab4d86365360fff537648e1f5226b7cc9efbcb5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:46Z), 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/DEZ651206152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b890172ad076e9dfae465004b3ba6756841cd17945e8a79c2c60f6069014172. 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/DEZ651206156.