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 0xca8f31c6e6119b8c2e25de0b27e9689b9828c87583fde94536b1baf2f4a0df03. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5698a0f5-28f7-4d45-8118-26901951bcc2.json and https://artists.proofprofile.net/proofs/artist/5698a0f5-28f7-4d45-8118-26901951bcc2.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 0x80b232aa2c85c5fb923afed99693d0e805010cfaa82e4187567a50cfd6b04745. 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/QMDA72403203.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb232aec00cfed401c56054cca9ca1f26c25dfbd6dd9b402cc769d246c128c967. 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/QMDA72403260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e25831bc596a5e5bd6a1533d8553d5d346a88a39f192b0854e22f6e4c7ce99f. 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/QMFMF2401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a59224c5408bda235c0e2ca0ce634a0fd57504fdcebc0055c63d94abd3702. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:08Z), 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/QM4TW2580784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a977948bb89f207ef05e9a142efac43987ce16bb08c9bc802b42dfb2868f292. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:06:52Z), 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/QM6MZ2597373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e25831bc596a5e5bd6a1533d8553d5d346a88a39f192b0854e22f6e4c7ce99f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFMF2401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b232aa2c85c5fb923afed99693d0e805010cfaa82e4187567a50cfd6b04745. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA72403203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a977948bb89f207ef05e9a142efac43987ce16bb08c9bc802b42dfb2868f292. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6MZ2597373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4249afeb44fbe83e01e5c1ba1205633bb5a3a039b6028c6fcd4c6e3b557b2013. 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/QM6MZ2597379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c2f345cfa0456fa2bd048fde0f6de50845ce02566f8832be88f8877478122b. 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/DEY472571512.