thumb|Common chicory, Cichorium intybus, is a herbaceous perennial plant. In botany, the term perennial (per- + -ennial, "through the year") is used to differentiate a plant from shorter-lived annua
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 0x359d22de51fff434bab70dacf4b8e8f7c7fa01b1bafd5bf5dee7c89b349107d2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f6acafc-0047-48d4-9494-5ee9b0aca3d7.json and https://artists.proofprofile.net/proofs/artist/5f6acafc-0047-48d4-9494-5ee9b0aca3d7.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 0x352c759d5cb55ad7031e504d37ba596ffb554e2273ae4e63d79c58d1d7a0e532. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM4TW2480854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352c759d5cb55ad7031e504d37ba596ffb554e2273ae4e63d79c58d1d7a0e532. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:42Z), 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/QM4TW2480854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722f0d28b97fb0054415132d0d6ebde1c433dbb42e07ba86981def862b7869e5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TX2437338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085618bd1dd61fb8fac4bccc5eb6268eb42ef217218ab7313c41a73258f22078. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:24Z), 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/QM4TX2437342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47f8a2a20a0aee1ae109db359ab3c926dc99b6ca88c7d3760cbcfda741aef92. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6MZ2506611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f983e4017a1adf74febed54b7d5672c6fd83fa1f8304b445c646f88aa7f972. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QM6MZ2510273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d63706da2a83c6f92b34a44b657198be1cd3edceff75053f657b6a96cf61fb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6P42584085.
"A" is For Abstract: The Complete Art History