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 0xaaa571ccf4ebbe0c234fcf666e97bd71ea2226dd18e9144f90caf24b313ffb5f. 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/ac19f516-c663-48b9-9a06-b1cfa2da4c4b.json and https://artists.proofprofile.net/proofs/artist/ac19f516-c663-48b9-9a06-b1cfa2da4c4b.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 0xfa416ba2baeedd446798b274f6f64774891414d26a4fc2e00ec3379361484f2e. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QMPKX1879932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316f35596783e77cae6c893378914b6b2f373ba99d9143eb4e450f6540537fbe. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:46Z), 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/QM24S1916448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd647fea48ff3be58e8fb1d32a5ada959c32148e2a386e775a998facd268e0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:03Z), 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/QM24S2000995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f887007b3fe4ef157ac86111b999d40358757df212ebac07ee45b8409b2acc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZN882358881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294beb5fa4274a5515cd2e54eca86ae8a07616e9b7834342cebfab49e7312d96. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:52Z), 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/QZVEM2388797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbc272122b2769693f9d217f96e12ad3a512edb816ea6d7b800998b1aff4eac. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZPEW2438200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f038943bf66bcfc20a2036b79f5dc2bc8fd1d47dfbffc9d9c4e1a5601da5418. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:40:04Z), 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/QZPEW2438206.