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 0xc855a7f21eaff3e429f0aea9fbdbe2a22f0e1ff9380fba089dce870ec7e6d39d. 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/45f88d01-2ef1-4f0b-9e02-cd92bfce7ad9.json and https://artists.proofprofile.net/proofs/artist/45f88d01-2ef1-4f0b-9e02-cd92bfce7ad9.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 0x411a4701b02df93caf8984aa47362e0663ab37ec6b9a69a2f0d3a5d2ff9256af. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CH6541789772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78228734ae5b3137095a8a88c2e383c9f26f8b68988884369e42390c373607. 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/CH6542044922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2f507382b4ebf01e04bffd728b2126ab3f7cfc29b010f9e9121383f7da6459. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHNC2184615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f667995704f9509c54374202ee3752b6cd171f24e17e08ad35b24378099aec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:18Z), 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/QZHN92284186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ace80e407f9f22e22d6915b6d0faba5416b54bcf8e551c364951d6e3804df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92284187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74f5bc77e4ee74a343716446c1b97ea9236bcac6d9111364c57eb0a1266b718. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTB62247172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc536ef5d3e069042481c75abdf4b8be2a08b8e808a6886bbdede2fa757d24272. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QZK6Q2406377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01ce5f219914c3fb2551f5717f86d11305fa1c44e082199bb58408803796598. 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/QZK6G2459297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107bbb94bc10442066eee0dce5fbcab878db0081af4ae02fbc36c7d81521fea. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWX2419484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa69af041bf94fe3ca64aca6ccf446796def4a9830fca3711da32ae08a1f8a5. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QZNWX2419485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1eb8b30088caf008f9d565e6907a5964d33382ab99673562610b471c8b080. 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/QZWFN2524214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1d8eb1092158b1e21124c26dc18c798c9048c056a53a1b528cf12693a8d08. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFN2524215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c8e23e3fee9942f52a2fe45af908d8d24b4ab93d5e93eb32aad5a5c524e0c8. 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/CH6541908675.