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 0x85a86c9bbb2ec73f5fe0382bab4b3c96afecdbc10ecffd34d89e29ae7302296d. 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/6ea41b4c-0d2a-4c8f-8851-a48a7244230f.json and https://artists.proofprofile.net/proofs/artist/6ea41b4c-0d2a-4c8f-8851-a48a7244230f.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 0x8293a30f14b854d7375fd50ddc74a327c87f116e6d19f7515751423c0d707b47. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:16:51Z), 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/QZMEM2147880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746d1cf1bc0fb4670f965a34a91f9ae880a0c47b030cd37a4c0f1643a7369c79. 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/QZHN62110459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9810a609cbd2fabe19e87a5975f061eb727cf82bdd75b04a68b458dbb015445. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BEKE52100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dae5c69b9a41b0fdf8be303a6a1a4e4996a793131cb98c6e49530540c38342. 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/BEKE52300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ca40dfa6939fe4a2a8c2919652f538df37816e787148411f7477af5ada336. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BEKE52300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f67d9f24f5590b9d68e348ec4951562e8f6cc20d0a0da729b3938b2a9c124d2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BEKE52300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aef9674244577f97f5254170e3d799fcd1cba6b0cee4e47c75232290691e28. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:18Z), 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/BEKE52300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5c7baabde5df24e13db2927010b6e8ad1b37d9a3722974a91c4d433a72a06. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BEKE52300057.