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 0xe0a3978a8bb184ac205a9c483dba1dd5717522a75de87a283b5e7986bb633d80. 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/aaf4e631-9ef8-4b6d-8dc4-45c10f755a75.json and https://artists.proofprofile.net/proofs/artist/aaf4e631-9ef8-4b6d-8dc4-45c10f755a75.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 0x20fb08ce3622395fb22f5741a85ec02c56eb824b7dad1c0b0e5f5221e9eb4d9e. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/US3DF1956724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d3df84a686f50362e7d34b79927471370737c03ac3e2f0482888b30d9c5c3d. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/US3DF1956726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a07f3bfa390fa39fbf9c9f7f10c8e058a568791ef6050611f3a7c058d99b83. 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/QZK6J2162857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2695f8b733683a6298afd117c98663f6e0a569fbe3c22d8e81350dfc80292bf9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6J2162858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1711e9f6695743dadec1d599c101d9eb5a5009cae2331e41633749c214a2aeda. 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/QZK6J2162859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3f6bb085b25ac2de0cef4ae742aef881cba5a4d9bc3d09061b76bfb2b44601. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZK6J2162860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a36d0424fc0dd3c33ee6e2229997ac48f3ec3cda9b467cbd7af9302e04e36. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6J2162861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18214db7f2154498341394ac244bf9f4af528cb3f81fcdb18f9df3793b0f34c2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2162862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf57ab2b28babd87573594f638cc5b87b10ae7247c620cbf3bb9b71551862a38. 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/QZK6J2162864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2163040554a344325ad0c8706b49b8f7b3a12722b8716007f67eca58d1c6c3b. 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/QZK6J2162865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd240f8bfda22d66c31473474447ed421ef91ce5dd595bcdc6ba4fc280429248e. 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/QZK6J2162866.