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 0x8ed79b3f12f511d3f781c2c8aa92552059304f5201d8eb4a7548b357da535840. 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/6ada9dea-f39d-4a8e-95fc-24b2b5b46a83.json and https://artists.proofprofile.net/proofs/artist/6ada9dea-f39d-4a8e-95fc-24b2b5b46a83.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 0xa27429424816195e821b2c1e4cf47cf80e469ed99308c48387456fc762fd9aa9. 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/GX8LD2232502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e8ffdbe7386654dbdd9ed7d71da36d7bcd8fa838f7e8737c4bbb90a2d144a2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GX3HH2160356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeb094553a1e0276247c6f5cbc8b52ffd197c317d99f91552fcf9c71248636d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3HH2160357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e25235d2d0957d26060b9fcbd32d17f85fa8cc7d8c9100128171e7c615461d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX3HH2160372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7dce84bdd95dcac3bcb328675c655f17eb4145fc9e2b8807442261996b4cd6. 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/GX3HH2160373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd35e5805f09a81e0a572b17485254096eb2a99fb5b516919be6a988ed10ca0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:54:44Z), 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/GX3HH2160395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e4deb766b7bb84a78b9fe43a5eb4a7b5e4de2930d07a0f4333070813b8b7f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3HH2160397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f3ddc9af969465f01f9a9c0db33659458e37fad40dfa83cd124d7a101f3df0. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GX3HH2160392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1b12763617e23cb9286aec5ae3186584fcb8547b47f5a2846ec1280638330f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GX3HH2160393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d92919a450b4bbe072edd147f688393da0079c8eebbf327c5fa28664b3766. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GX3HH2160399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b03f26311d09f9a1e7a72499b885f3cf182f99f20a4141dfcb34c7d263afc5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GX3HH2160416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b33fe45f64a59d7ef021f9afd2708c226c163ba38d616e4c083b026df97738. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX3HH2160417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15654b138199defb92a7bcee9c3023156c725432630c8e94aa3ca046b07ba742. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX3HH2160419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e90db995cc300c32670e97271584ad803ceacc9567885f244c9937fd70f94bc. 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/GX3HH2160495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc8690ff5f376e5437c17427482af1fd389ca547b54bca33964b4137733f341. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX3HH2160500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35f65a8c4e8cdc1bce24f0e4173771be5d337464ec8e350cdb346da3b17ef65. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:56:01Z), 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/GX3HH2160564.