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 0x8fed09797f9e3e290abdcd1a725e1e1032ea8075b18c39f4c98576a977bd4306. 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/4f1681e4-7df9-40a8-880a-1d7ac7ea945c.json and https://artists.proofprofile.net/proofs/artist/4f1681e4-7df9-40a8-880a-1d7ac7ea945c.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 0x49f0e75302124cd9dbfacdb3d91fd67e583380a33de1dfd4ef00bac85d3afdd8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BXCND2100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d827fdba5fd8960bcd796c18a723687350a79fe3167f548686d1fa1740f6e9. 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/BXCND2100295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadeecb9bdbb687dc9cbd80ca7893227b761f8980c5efb1fd348dc36dff62c31. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXCND2102108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9378595f73f31370afc0ee3f5ee1f37e65a5169f03e58e77dba20349a7ab0087. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BXCND2102109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583916881a26cce778a13ccde105b2e11163f601f6d3a6d32244e02e29f45248. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:39Z), 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/BXCND2102114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e44a32435605a5b92248c8dd503b61be61d51b9c168e92263f8202b2314e73. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BXCND2102122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f3d27f0360d092ae9159d96748d1391a367aa9129ee9fe4af4961403b0b04a. 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/BXCND2102163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53531414d9c6f49e5cc26d65c5a7642e09af288ac0f83df307f6dc86d7281f25. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BXCND2102165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417df0c4b3700785b67652e3f94051b52e39e8263784da28b023178270455ff6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:50:47Z), 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/BXCND2102169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aacd20fbe0d7a2dfff55345c05f081b0731c61423446887961215ba2f62bb4f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BXCND2102172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecc78635d18ce5bb4369f8bb76f8a746e28ab23fc7770f1a44746d8a8d9cd22. 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/BXCND2102173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c28b22d9498c52b803a5eee7d2665cefe59df1dc7fc50d010acac6950ca971. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXCND2102174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1863162a6b6d1f6a28f9f8898ed429f4e5c19706c316ef94486dbc8be22e300a. 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/BXCND2301323.