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 0xb4395526d4821c54b261a1e0335335a19f58a34cf89ea917de8bb8b4f1b64239. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ed73d89-91c6-495b-8f90-f5c53b42639d.json and https://artists.proofprofile.net/proofs/artist/9ed73d89-91c6-495b-8f90-f5c53b42639d.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 0x2d674e733a6f24e7d10ba23a185256b0b66e650125f8d5ee511d830b4d71ff2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA052408932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec833d39a078ff5067733a7e9f10f2a999e7c825e97d014b74a1aac765127ed2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:30Z), 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/DGA0L2387070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99d9b33a3ac7a6bb79718880a0fc3252de1300739d4e825c127f29f870a0c00. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:06:25Z), 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/FR10S2466863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c6d9e632c3e9ec8fb67d4f7af80be0db31ba9de5cb9b3c2f51a0276d073fb9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:03:54Z), 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/FRX282455705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda27e7d23b06a89a51c1739349887c3ca205fa1de103263494f5fe499f4dbf54. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA052408839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bf407415a35e3dc583d9a7a92115ce1993f51f154f1036aee370c861918c54. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:37:53Z), 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/DGA052415959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0038d79e4cb14502a0a430d39bebd7dc36c4fbfe03f71b94b1e3f236991cf6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DGA052479971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc0b52a2fabb7b83bff3ef57e9a27f6383919e0416b2ca6b8dececfed4c0887. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:26Z), 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/DGA062417586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea97952f85a67e7e58e620bb7c2a3b6aee5b0654182ce46277ac51e231eec39. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA072454717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0e641d8d333ddce13360cd73ab00458ab2db730ab792d1e3970ad312108ad. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/IDC012400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22309c79a1559a2704f0f16aac2b8b22d49ed1a388cc59c4787512f202bb0027. 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/DGA072479068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d9c7b0eb28457c51a0cc5964a11859252826405acc06223399c52a2555d8a8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DGA082406270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d95e855e7c9b247a9c93f6e2c0e727111054976080ccf01f3934aaa22bbdf4. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:51Z), 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/DGA082419236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80856f8b2449031dbb5a3157f513972eb2fab5918bdf92dceb9d9fa67825853f. 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/DGA092409503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d312fc2b0519c61e0a0db4d3b2f8b339f79b4b401af11e2385bb69459aa44. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DGA092437492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784818a4b3e2ac0fd13a905b5578753ba60d3987f543d98f829e7f29dda865da. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:59:42Z), 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/DGA092446182.