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 0x3ed73c2be76e5234f2d8f2f43be95938e4d3e560676322cd142d4b1d47be3c58. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9619341c-d3d0-49de-b6f6-69039a72bf50.json and https://artists.proofprofile.net/proofs/artist/9619341c-d3d0-49de-b6f6-69039a72bf50.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 0x95cf96c1786e70370d5ae45145ff8fd58b4c3124138f5d924140fa0fcf281922. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFX2427226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc843b483c11fc001107e75fda6f62dd9780c7629e6ad952ca62526d0cd5134c4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFX2427227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d02db89a9b91716d8dc68d364b8f493cba284b9f4beb7f507e26d3c71ab9d. 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/QZWFX2427228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac674af0c79909efa8b081e681fa191a1cdbf11e30354f156bb3ae85b1b040. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZWFX2427229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098d00ecf450153267d2ed2ab49603f148e9988da5a793671caef1bf16c1f12d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFX2427230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04e11a5b9b4b6e24906f47c9af8c653b1017f371f5106d6e78a592bc771186. 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/QZWFX2427231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf52fc706656fa7574b93e341cda62613ec95648e8810a8c4828f6ea2f163cf. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZWFX2427232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753ecb01a31a527e31fe5ed9e8d369729fb14ebccb704542142d80c12af1c19d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFX2427233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11527cb94a1fad5e7bb204a930db8a3b85ce29863b58b176ac1be7ea65bcae0b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:11:12Z), 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/QZWFX2427234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fbc96cba05ce4ed6c43ef576955608343b2ab992021035fb06135d09005638. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:23Z), 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/QZWFX2427235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff33ff721aec156e8992b5de177a02f90045e6f0e5e53017e36c120c084e4b2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFX2427236.