Impress or Impression may refer to: Arts Big Impression, a British comedy sketch show Impression, Sunrise, a painting by Claude Monet Biology Maternal impression, an obsolete scientific theory that
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b6941312caa9f971069a5d0a1c683abe8a32c9c3b193345f3f0965b829c77. 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/3082440e-4cf4-454c-bd0e-104ba398e730.json and https://artists.proofprofile.net/proofs/artist/3082440e-4cf4-454c-bd0e-104ba398e730.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e376c7d35dbd4599f8950ef6311420808c26e67f1e3a7fdbf10e646fceec254. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLO381500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ccc59b641531f2987ba92fbe32587abd0e16d2e451d68569f225fcb2f9ce4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLB231900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc625bda6b7f5bfa050a03da3efaf7197c49672c3d7856ba9dccc3bd291c3bc72. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PL68H2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3198e58ff4f6055d0e6148027eda3d1151917bcf6b998baa475d8157f8b7cb. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/PL68H2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd99a0679a5d12e981df4a7465ed825c3c422bd2e5b83aef3881f6c709ce80dd. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/PL68H2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9187a4037d6740bd1a729f50cdf964544b7b68a4f3ee09075b0d5d6915912364. 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/PL68H2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9cb52a2646427a7e173d1b287999f714284216ca366f1999afdf77272d633f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLB231900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5400f5099881d18556d8bb0c45b52a28868027ff6c4128d211dadb11dcd105. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/PL68H2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f7aa2a15247e3afec14356d0b6b1ce725d7c6d9715e3b0b75066f0ae43b3f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PL68H2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf336593a23aa21401fb0d7b3b55f76be9e017bde4b94c3b56f3053fa4d9dd0a2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PL68H2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d3c9ef5f5268c3c1afcf195383ee484fbe35b97501d8da8b8087ef2ea208b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL68H2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa192c59d018edeadeacbb8706667910804172e515ee4a3ee60a7345be68912fd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PL68H2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eb2aea92d9cfb6005ab4583d67894b39cdd52f55f8b189da7415af23ce517b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PL68H2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5264e67a5b9d5d7f5af1e4678ea6e749eea7c355db4f490e93e0b2efd3aa38. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PL68H2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf551c6117c7d99bb666c7fd1506e4bfcb8cc9a2f1b98dad3ad3a3df0da3af5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PLB231500432.