thumb|Brass tray inlaid with silver, Egypt or Syria, 19th century A tray is a shallow platform designed for the carrying of items. It can be fashioned from numerous materials, including silver, brass
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 0xadd9c85e9a4882bb5550f22d159b847737f487fa2f4ff232aeb427eac0afb247. 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/151ce3d4-5761-410a-8a02-80aae31e5df8.json and https://artists.proofprofile.net/proofs/artist/151ce3d4-5761-410a-8a02-80aae31e5df8.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 0xb5842b58f17469dfda559cefbc8110d15329bad240a1ee640ede50d7931459cc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DGA052248613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3833504b1012757fd6b1c0bca8098acf6e83bb52c397e1cad8999a245efbc2cb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062336922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb038f38250271c5bbb7cca0b82f55b48969cef18e87bc4335d8b270bc88e1ed5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR96X2447013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1f0fb5bfdd5e71b1494cc34d18e2a605e991c98d2f4177a1bb173cb4f2f6a1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:05Z), 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/FRX872469875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45304db3a6df3daedc0753e0f31bddd30b771ad109b94bcafdd51fa9914b0d9b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:44Z), 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/DGA0Q2497857.