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 0x69192d373f3baf1d68c2477f6ea64167e9576379f4dd37db85aad7e7a24d987b. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adb517e3-b630-4f40-96af-f7453c60d73b.json and https://artists.proofprofile.net/proofs/artist/adb517e3-b630-4f40-96af-f7453c60d73b.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 0x51068ae8fffbd69a0dd540f8aac7b8071c5e2fc599eb043668b4cc0b1d3ae4d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ022290752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1990a72fe977ac329ad32fe4c2e44888123bc3138ab83e7bf69c94a0127cec51. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEQ022290757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46334d50e45138785727cf18b2059f9ed0c951d6c0164a1aca3b89b318dba067. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022290759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a645f9d133ff7f642f1181daf7e1cfcaf31d8cbe15f848b4b3009ed0f61a2. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/DEQ022380596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4b95e620cf113adf3a1a0ed650eafec67eddb063eb0c3084cd740985b395ec. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEQ022380599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882055f30d24f5b39f5bbed050569e18807e99b5d615dc19a3de0d66ab2e46cd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ022380600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a0ba041cf956ad55cb85b4aa3679f6989a79f39f144e2f6ecfc8ecc79d7417. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ4JJ1773724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68c4d43b84ad1259ab7e0a04275e16089870def2966be02614c303fb6eeb4b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ4JJ1773726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c6019411f622fdf7bbc1ff2789c0842ff3d9104ba9b64b41941420cd66b12. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ4JJ1773729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6256dc11ae0fa1e4978b6c3529f7154165804985ff7bbcd1098705c858952bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ4JJ1773730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f5e994f6c3c9affe903cb35293051c03fac137cbbd6ea2148105dfe4025a4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ4JJ1773731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c22ebd3b937186c518e185997da6c9707d1da61eeaec49e940d8ca72642a45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGB2222305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775fc984a0ee2f106a500b0849df7b8ca40c9b38f0b7fdf49213477e72684cfb. 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/TCAGB2235074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048aec959cc013f0df5506ad847eb0d8ea48124230f7551368870ea47dff3494. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEP2079924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb32aacf3689a945ff8f212e199d6887b89dd9c722206585822569c1de034498. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ4JJ1772665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978cf9c06eba3eda31883a19ce783b24365755cdc01d8b71775a62916b27dc26. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ62039118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93272475c98f1d3fa0ec36c6d3a751841b5409d7232de9781a1856b2ee6956c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEAR41415761.