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 0xd4eca88720a82c8cb40e99c79f329d339b992b7970d7c91b7e0f645bf1367487. 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/fda867f2-2baa-4e10-81c6-0cd30eb122a2.json and https://artists.proofprofile.net/proofs/artist/fda867f2-2baa-4e10-81c6-0cd30eb122a2.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 0xe5a1c3f22cdf1cca94cc1cfd3e9a36ee76c8980e8184bc144f75fab8147ae9e2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:55Z), 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/USDY41812221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a8e9abd7d67645513932ff462e3f606fcb72d2d11a9aeaa361df62e9f3214f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SE57V2157001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4497d5110c3959e95a56c6cd332bcc91869a1bfe2d842768c48120ee5cbd9a29. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/SE57V2171001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d4038370c94a7df8e367c7a623f81b0fbe976edd880514d38f1aa1a4fc415b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:49:22Z), 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/SE57V2172001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2371cf34aa17fa4b3d742f38e2ba4d758e60c69b759ecd24ea4cf8c3a9db8a8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/SE57V2112501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f4a781c6ea3b2b8e907f17c962d1fd9f40b43f059ce7b0a7d8589f8fe039e1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE57V2200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7059a11198cc6325242d588b34eb787b6de3a469a468600c1f341fad124e19. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:32:16Z), 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/SE57V2200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80db041be490bdd2467b463f7ace76f93ac104a4ad4e4c1f1bd7abb1f1be3e8a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE57V2200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52986849067729d95337b2367dc8125e3666f3f30590d5038128961f3bc36a86. 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/SE57V2201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1394b9cdd364d108b59c9084bd68114fbede921fbc9f5a0aa21c5fe0d45c820. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/SE57V2207101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63381ac22c812fd22c13bbcb30338fb39336ab01afbb87570b56efe52183800. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:32Z), 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/SE57V2208301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02713d09e1b0084a5476484d31f9e39172df6149fb72285d6f1f013f2dfd89cf. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE57V2210201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dde591c8911e5ad094fd40079228460c84380cb9cd124632d4e6f3d9f99b3f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:51Z), 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/SE57V2354201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1329211a6015cf699a3d8dd0167cf187ceb8527536f248dffdfe3cce618f76a7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:31Z), 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/SE57V2413091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f2a8b9aa1cdd08126f5ec3e02f2870d40cd802b2c12794a678409134aeaa5b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLPF2522940.