Notion or Notions may refer to: Software Notion (music software), a music composition and performance program Notion (productivity software), a note-taking and project-management program from Not
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 0x2cabc1b6ecc02e0043bb1019f90676f5941dbd5b02060b6a9d7494a271ac4068. 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/65e0800f-2872-4fc3-b96f-a08f48bdb66e.json and https://artists.proofprofile.net/proofs/artist/65e0800f-2872-4fc3-b96f-a08f48bdb66e.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 0xf3ab8dbd9479eee43848f2eddd11d22fa5bbbce868b3059a6b575946b3c7c1c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM72406694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f56ed5385ee74b687467242e0baee349f9234022a49d4de86fcfdfa590a45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFMF2385668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1d2a62a527e8a7ffe19fa25aea14480cf3c9afc60b1eb98ce562aa2fe8d1ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CYA112000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f56ed5385ee74b687467242e0baee349f9234022a49d4de86fcfdfa590a45. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFMF2385668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf7598d7fa6456807586b2d70aa75aaaa943dbceda9172e6aafb90bd215ea37. 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/UKQNV2100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dd8fb4aa3ea2d5876d19a40fef1057d2bee2b3a06a9359158b9915c163be43. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAHT1700502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcf07cc6aa38e3a963984f6d289b934104221d7780448a181408ed9f4d870fa. 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/GB2LD1800914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df5b02e93a91d5c6d452d1f042f78a6a8c2a46bb0747881a6e29f4beafb6e7. 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/GB2LD1800917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0440c374cf9f9e06e473ef088c9fb54ebeffd3cf6603ff2acf83c3c3ab0069. 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/FRX202058471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0440c374cf9f9e06e473ef088c9fb54ebeffd3cf6603ff2acf83c3c3ab0069. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX202058471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b998190f4a69610805b3053e2c0a2e359ce87bba676067ad7c7658f549c8d1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBEXH1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0378bb9cf93981462b375b193a6dddc092f156c2fc5a3770f1ed02c8f4de044e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X1744688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a3ffaabaca4a2d9746dc990a6a40737ccc983850f7651e87e6698084b5b8af. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GB2LD1700361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8f2d37bca61a4f5a02c5bac93885a6e30fd2dc90b293ca8b18d0ca258118a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBEXH1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510e6bc033aa8859e67f0320d6811b929443226122d1f9ef0c9f41d8c0d3d00. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GB2LD1700360.