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 0xdc5a1126105d516e639b65254f5accd9dd9e546795dbba22cd884ea15ff3678f. 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/90b81be0-797e-4ba2-b463-510fb2d2f4bc.json and https://artists.proofprofile.net/proofs/artist/90b81be0-797e-4ba2-b463-510fb2d2f4bc.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 0xc588c3df77ef44c8736364c57ce6c0e758e6115c272204adf0a25bd752b4cd03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6803c7c49f838a13502333088a54bfcc458924d94eccd65b75a0644db6ea1e2d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2241943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc9174aef010d12c902d3929b12030ef021fd30543bfaca4f580a99e7e83061. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2404823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c3ce87edd9c6773252ad6992927fff63a9b1cbd7789b8a7dbbace0de073c63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6N22233443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905e886344fa919ecbb14affdaa5d5f1f514e0db1b9763d180c2298a262f3cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152201664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905e886344fa919ecbb14affdaa5d5f1f514e0db1b9763d180c2298a262f3cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152201664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6735ebd8fb77c1e8b923e3b6e4a564622ef4ecd0f2874596317e520817c71. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92219519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3c1952be6005e3d4b834950577be958b50a9ff19a65127ce1940b8160a9c4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c92278c2f028afa1e39ca5c1377e4eb2162e9a64f3fb41607c471545960b8de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92249749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f74500eea49a3e086589b26dda5aec2dc5cb36275bbcc15ab5b57afd48f2d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2055934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6803c7c49f838a13502333088a54bfcc458924d94eccd65b75a0644db6ea1e2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2241943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204db59bec378aebf5023453f82a97a0c1b7338e50e4da468aaf4db731dae5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ42285072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6735ebd8fb77c1e8b923e3b6e4a564622ef4ecd0f2874596317e520817c71. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92219519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e614e950866f258b4cdd7d3ee35b5762a4cada2e20b8aa92cc55cd0b1a2c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ52221214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204db59bec378aebf5023453f82a97a0c1b7338e50e4da468aaf4db731dae5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ42285072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc9174aef010d12c902d3929b12030ef021fd30543bfaca4f580a99e7e83061. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2404823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce9f4e409dae9fc02cbbf8cc39d0fedd69732a143779f1f5226bc681ef1665b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2038820.