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 0xbbdabd66df7e7a888296191e2cd36fddc56d061e19dcbdd2f8760400780e6238. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b13fa6d-5ac9-43e4-8e73-9fc58391435a.json and https://artists.proofprofile.net/proofs/artist/5b13fa6d-5ac9-43e4-8e73-9fc58391435a.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 0xd1cc1a57e4d057ecb20fd047244254c552b982a936227b37f5c01c7f78da06b9. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:41Z), 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/QZDA72535670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197b446d37f30c74de4ce755c6afc0e1598d1431fc9040edf3cf7ef1e431b7f1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:33Z), 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/QZDA72535671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6434cfa648b95b8e9af4f76467db8007c1c2ad6f6a0bb078764d171d7f45e649. 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/QZDA72535672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501d02da58accc7cf55be63abe0685d714e53ee10473a132dfc6b8a9aaf4f553. 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/QZDA72535673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9658e7d98f55fc8e1f9cebef89ac9d3c2e5e1cf9b6d1b9c367301a9b999aeb93. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:28Z), 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/QZDA72535674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6e79ee46954de7fc612fef8756fd686a34a864707309152cf50273418defc5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA72535675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322dc545efc6a8c05f8941adc9d5a471c96e5c17e3b5fbb65330f04375896189. 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/QZDA72535676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b28ef46bc8b281cfaf7b12df5d87b5417c6d56f114befd985866d04f2043d92. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA72535677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ac2c3aecfb98f5af42c03f1e23cc76f69b8e6f34607096f309a58e1918874f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72535678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c678693e5746a3bf5bc1181bafdf4ecf2eda7d55dcc04e435cd0bb9f89a95ca. 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/QZDA72535679.