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 0x6abeb20a1003206d474213e2168d22c0d7b9b8c05b5298ba635495b70de87ea8. 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/664f9a59-2c3d-464f-9d47-b05dc771847e.json and https://artists.proofprofile.net/proofs/artist/664f9a59-2c3d-464f-9d47-b05dc771847e.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 0x4800bb7cf8a4f5289df8aabb38264cabe2596d74c73ecce4cb897e4ed595fb00. 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/DEE862400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a4e931d3d1991a2cf3d337d3265ac5d598215d3ec177b916544ab6677d2eaf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEE862300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6cf7e8e22ff94f26da2d2a0a02d1240f19224c76e03f75b11d16e5af4d3434. 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/DEE862300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde1fad3258ecdc76ca452910cfd93701d1b328a9ccaef1a36199caf05093126. 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/DEE862200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a66c106a556e1ef84b6cad2588aadd2738b0477315a5fcd64deef836953f65. 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/DEE862200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6529b96848f22e1b308ebf684abe021e5cd2bb097319dddd80b63978b6173. 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/DEUM72402597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a12a54b8770cfa1904c660b23635dd487ea0e91a627d89cd86c728372f72be6. 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/DEE862401286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8c725978598366c09a451ec63dc899898638fd26a263f2f17312e486339347. 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/NLZ542400704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6529b96848f22e1b308ebf684abe021e5cd2bb097319dddd80b63978b6173. 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/DEUM72402597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb887721d42b3fec2a49a4c675e87a5aaeabd593a9012bcc78585e71c186adff0. 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/DEUM72408427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c81c5bf1640386e132c613273a572d85cf221a7d3c90675af5eaa799af85d. 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/DEUM72410319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356db6a3f948f9ac8707ea5779e809b80ff109ddd46d7af267b79b3b8e187337. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM72405956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360b6d1ba0bbca49efae8cd8e26fab683f60ddbbc7b62c3e53908e9908c7234d. 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/DEUM72500875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf09f0dcb44b5780aab23b483a3463247a496a7c31db805313a78ea0dca1335. 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/DEUM72500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5ffd26511ca9007fbe834360d3d4cf382f0de03b8f03532cbad53c749c9068. 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/GX8LD2545686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af1dea0809127349f7c29ae8361e1f97633c8967eaba195717f2f731c6c9bf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUM72411229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356db6a3f948f9ac8707ea5779e809b80ff109ddd46d7af267b79b3b8e187337. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM72405956.