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 0xd89008cdbd7454db2b57ac6b780c873a77d120b807a504c4e65148ee30eefa8d. 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/e196f167-b5cc-470c-8061-7c6330c8e16b.json and https://artists.proofprofile.net/proofs/artist/e196f167-b5cc-470c-8061-7c6330c8e16b.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 0x14c16c3ad5b39883322643d8f7543052e7083e7da733d9644b4edb1903d704f6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:21:43Z), 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/QZSR42159021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fce07de647561e0f867d575551c96a5a6743c1747fc2c6079b4604752c14cdc. 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/QZSR42159031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146ca7b85f4d0e603032d56e3a27f5f9ae7f4c19b7adda474e5593d3870f2f68. 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/QZSR42159025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d7ca79b32f252718babd75fe2e3053c07c701dfa65497369a596b0ed90e0f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZSR42159098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fc0172eab9f7c55869e4ee940e8fdfd56af1da0b3d70d3fa6e17337927518e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZSR42159079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa24ff98deb9b210f5b5414a94e49958af9f2399ea4f0f1c03e1a6b6661d136. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:07:46Z), 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/QZSR42159081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb4bc4b4d374248848cb0576d647c1cea656fe2d643513f959dd69ed7f27a7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZSR42159085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a459d083d4b54637cff5ba1e826c08d176fa716cecb9645e591cb1fb05de950. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZSR42160722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c98a34e67fc8d374c06ada56af05c1b6f75b9dc6913a53f158efe55afa4518c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZAMM2207288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede93411a57b80ca4a9e0b67a276f8e04ef3aa216b27f1a11eef0e39042f400b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5BU2407213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3397d4628e86c546477ea9375971e3c44ec16b3684d9bc0c1bf0751259db4b. 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/SE5BU2407215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca41a72df8b550c69d4acf68f96e20fe2ba239ba70299ce7d0423741d3cc5b1. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/SE5BU2407214.