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 0xd924793d3ce02bee6057242470e2bdc827e3c025862ea3b1f1f541d33192a081. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0273c1a-9cca-4a37-9fec-0bf6f27ea65a.json and https://artists.proofprofile.net/proofs/artist/c0273c1a-9cca-4a37-9fec-0bf6f27ea65a.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 0x93f8df30e937c82787d6da6823b311bbba3845a5fc9d5db1d40ee8215a29090f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLR2323976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1082bb4154c6c152073c13f522cf9fb9844ffc75335bfd7b6f97fa6b11cde851. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWY2333414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72753795a7a5c145929cd25e67b8b0eb1ee51f22900ce60cfd2c04386d4021fe. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:33Z), 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/QZNWY2333415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3da7b7698d63120d3411d132956873e48b2d560e1be86ed7b8b67d56cc7395a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBA2451329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91abc70a5d2bd268a63620dfe3fb8c99bce7a8e0aa66eb6f0149d209025f12da. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:14Z), 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/QZTBA2451400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8f3e16af25134221b88f41501e323889a1e26b323dd2440b8c8449b52dd18. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBA2451401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc166aac79fbd9ef10afbb2af5716cd9832e7612c3f32396ae1e3fbabbac9a6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:27:47Z), 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/QZTBA2451456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe337b03c46c61f8c9215354d8b77edd7f349fc6d167a7746ee748c39ff800c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:43Z), 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/QZHNC2552884.