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 0x41ff7d45e82b1e226aa0df07ee4f2d16ed69ec9191f4bd5346100781a52eb3e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dda8a10b-c363-428f-9e91-c6dbc9cbd581.json and https://artists.proofprofile.net/proofs/artist/dda8a10b-c363-428f-9e91-c6dbc9cbd581.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 0x06516b646b52c7362ff43c30f7a9d5092165c6d1c12c9f8d5e7f43d202fe1b17. 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/USDY41947276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3f62dd4fff81ea68b3e9f405fc2ad08355292551a99d918044cc4776cd269. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:49Z), 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/USHM92068920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696030a2a0dde18cfa77bd824970dfc9d5e3ce2e97b74f8408cc103cf78b1110. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42174788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a021490542fb631b993c90ec9c83f74d3eeb7e6ab16b527c89bd64dcb1adc5c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USDY42174791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfc92d1fbd8ab5f83fffef08c11f382e04632cef86ae9595e01edc7162b62be. 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/USDY42174792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3fb4410424a9a8d104241424fd4e6f891bde6b6b634ed9cb032b19486a17fd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USDY42174795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b555d82cda1d311c84b0515091e220d0bfbcac4ba41c9870cf55d1174f54f5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:00:48Z), 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/USDY42174801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc070591ea129de39f313ee4bf609a50f2103d0388821bd8edfd642befbd1c1c8. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USDY42434107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e28913a3c99a27fb03db7951e2e5b0d28ac5342a7feb7bdbd96c9c544065c3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USDY42434110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8dbef8b91b49b4847c257e8ee0f52a93dd81e6e3ba245a5dbd694372592ec8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:47Z), 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/USDY42434111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d2bcbeef5a59851473a5eb4cd2d715f7a5336f4880b7e7c9757b068be57c7b. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USDY42434112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe939b5c262582bcf3afb6d92b56f1b186f8ba9e30800eabe6bf42e168126135b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USDY42434113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32ad34f14191aaa16753cfc4ff5206324057a3544fb19232888c01c34f988a0. 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/USDY42434114.