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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaceff5ed8b62ffea4a1c36916325eb4b4ebbeea83bb837b5cacc7d8a60140c1. 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/622f3667-6bcc-4760-8225-1b99bf66ce4e.json and https://artists.proofprofile.net/proofs/artist/622f3667-6bcc-4760-8225-1b99bf66ce4e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aee0989d6bdd043ba07e70855699bd07dd94d4889ba3662f9f5aed874ef83b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/IDAA21000806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f9fc46685a49f6507bc4faa5b630639776fb74cd249a8eaa9b636be2a56b28. 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/IDAA21000807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a269570b39ad72b9cafb604803ab34d10d2d1a756f33bbd2676495ae0391be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IDAA21000808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d0ff7d380ace670b23f2032321ba88f25d7c46efbff146649155d34276a15. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/IDAA21000809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0487cca4c2dfca365616131de13405ccca5844ace7580816140a604dd786d3ad. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/IDAA21000811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a8f2c6dd16c6b08cec91362e61407e52e4bddeadf54ff18d16491ccbebffd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IDAA21000812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc54ad643d9f4238ad476b26485aa555895d53ab21710758bdc6d67e5840e15. 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/IDAA21000813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e70a82b7b515c1105cf8c3f18441ea139ef0ace8789172f76f4cc67e3fb608. 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/IDAA21000814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe8c019ed8030ad32591fac0eae27b5ae633ada2238b7f8466f77acf452485d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/MYIS11800453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602aa967783df84a0a549def96175e26380d0c37054ef59763cd4a46a768789. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZ4JJ1935364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514928911498340eab21e1c355cda8b09743392bdf97c19ae295582d30dc5ff1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ61990747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c84fb6f09e3006d158c512de9b1c38fae7cb0ca61851cef5eddb98fdbe310. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA82076572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187d3204cacff4712c85423c1574c556f00ae165c960770969790a57e7e588e4. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/MYIS12100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5107c0100919e37ef5f1335a40a81c230f52cc4a5d6d5a1770fa35419a59af8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2277874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518803548452ac4524cb626b7585d8cfca846d5d9fa74595e3bea49c6b87f2d6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZYHM2374314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4402ea5c0a7de38d36c26e30de9fae3fd00983c6ca6d46c26c6e4e062463154e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IDAA21000805.