Smooth may refer to: Mathematics Smooth function, a function that is infinitely differentiable; used in calculus and topology Smooth manifold, a differentiable manifold for which all the transition
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 0xac230179d1421ac239d0421496ca0fe438f94d9cccd0dc58e9172352a2a49e5f. 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/69ca6136-c2da-4eb7-9a51-12a729c3c587.json and https://artists.proofprofile.net/proofs/artist/69ca6136-c2da-4eb7-9a51-12a729c3c587.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 0xf454298755e2ab27c73fb5eb00d34fe262562fe3321873dd356011a3103987d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR2X42220634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c64c4a19d7b467624cd8a30d35888baaea227a86e0a4de17810fc22f0d6fc5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLCK42212232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ee53a897080c86de6179781697b1ed4e121b23d124909900db56ce9f1f5df6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK41072247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb1a32fe86aff0dfa60baa08e2d14b4e060c2315901bb5e7f94815d7264789. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBTMZ1200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd03727b218f1ef216f572dfe86c6e4b99dc6b3f5af28bef95c2faa2455109b1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GB5KW2003809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc767a8cc42a5b96afc90c07c54282c82f10db3546abfc83c4d36b6ab290ab288. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB5KW2103351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93004e0af5fcbafc3c2b4a3a212e549fb91df9ea80513e6fe456ceb792977fc. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLCK41083002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045716429b3429d6e4e905b9af7e2dd827e8f4d4860483086ec4533701eceb9a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCK41083003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcbdab8ba2582f1bd7c823a61c8dadaf1c4f50afe98c45756a73707b9b56389. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLCK41083004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8818dde67607a35c71106773b4b7fb020b7dcba42d571c602a2a64d9a39d7766. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NLCK41083005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8b002210ef6a30643ca98d25ad9507c1a275fa6628733e6140f71cd3325f54. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GB5KW1903567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a8d36b5a073fee3cce3e3a2c218c1cc367e5d3661ca83b2bfe2f89ee3f1c28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2209027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f4c1dba06dee735219f002bd21e2adfb38f6b5babca05b9d2fbc113dfafb3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK42228773.