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 0xbb6952eedf6db5a69e684a53d9bc4df8cb32447d04ab404d46a2bfaa29b3585c. 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/163e43a5-78e3-4e8e-9f47-fc75fa0f140a.json and https://artists.proofprofile.net/proofs/artist/163e43a5-78e3-4e8e-9f47-fc75fa0f140a.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 0xffe4a19f918ddab44164467c2e803813d5cca4b677d4f01b29d9fb0e61c8c6a3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZQAY2380689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63a275dd34835f07a5e9dc2e76d6171eb294886ffa1ddce9254a800c31f1a4b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZQAY2345527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d07289ccede94fe593523a0ff522d5b4c807d015698d9a0e433feb1a3350e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS7J2337248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d07289ccede94fe593523a0ff522d5b4c807d015698d9a0e433feb1a3350e. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZS7J2337248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe018fbd8dfe0b4c7d7e60d32c01019fef31d601d3c301d80b85a1e1919514dab. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZQAY2483712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bbfdcc7f887ca0ff430c60c6e5080feedca16ca5a11d613b99ed8653b8ae00. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:47:12Z), 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/QZS7J2473821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bbfdcc7f887ca0ff430c60c6e5080feedca16ca5a11d613b99ed8653b8ae00. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZS7J2473821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e4bf261d8f37bd7426fa1f436c0a02e111bb1b3c44014259f5d23658994adb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZS7J2451124.