Signum is Latin for "sign" and may refer to: Brands and companies Integra Signum, a (defunct) Swiss railroad signaling company Integra-Signum, a train protection system Opel Signum, an Opel car mo
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 0x52214514eeb2f1b54ca1382f5d1aa85351895cf863d35d42048428ec19a8b3b6. 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/1dfad83e-77c1-4f35-8021-3a8f46b4d0be.json and https://artists.proofprofile.net/proofs/artist/1dfad83e-77c1-4f35-8021-3a8f46b4d0be.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 0x25e745394b139ba1486acc77b3448bd12e66ee4299e5ca0e31cfe821b9f51fb3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:53:43Z), 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/NLF710400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b140ddf75e405e72c44e5f3890df09492eef73d7590b773cce2ee38889e9e0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NLF710400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d589a953fd25baa3a8e835bc24d3a270fb2aed14967ad6272151faff633185. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLF710500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641cafff8cb7d10b3be233f071270318b1f7b78260c9ab9d1ce32ce4f1b19f22. 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/NLF710702139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05479cf532b9b22fd36988633075574a51fc8a6d2f31baf704cae993e0febc43. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLF711002150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483952ecd9467d403db3617b28cff693b0e6d754bee9b1ae475d5821f8480594. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/NLF711002012.
Liberate (feat. Kate Louise Smith) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c804ec497b4baee60bca1d4ec9aa380ed47b0c0be4b922b4ca6f2f7543220c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLF711701778.
Coming On Strong (Gareth Emery & Ashley Wallbridge Remix)
Coming On Strong - Gareth Emery & Ashley Wallbridge Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef2c0040dbadb0c0cfdbc0bcb21f04f414759de13a43aee32ef3f236f4fea4b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:43Z), 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/NLF711801257.
Coming On Strong - ReOrder Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8d4ab7a7566045576aac424f56995758f8e3a78bb3edf3bbba8296f0d45483. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NLF712012896.
Beyond This Earth (Richard Durand Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebd5d6fa7516590e06f5d39d119133a7ee08594e49dee6004d640c352672d7b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NL6YD2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2100f5f4e5376ee279a875aa2acaac978453365293ec846895c14b475b58e402. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/NL6YD2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e6ac0e6eb7d6569672790c529b0abd160c96ea493dc5017c8695713fe43917. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBEWA2501630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7969c5694568060973403c940fcd763f885b1782a6c4f2ef7c423b6e2f551930. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GBEWA2501631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09901fc210628cdfc1042e5f575e1948c91f14e1d2cb97643e81fa5c8b43686f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKRMQ2500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3fcb2300c20afa772585fe8664b8b3e11dc512355a4d18007ca8ebd6ef48ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLF711311437.
ASOT 1179 - A State of Trance Episode 1179 [Including Live at ASOT 950 (Utrecht, The Netherlands) [Who's Afraid Of 138?!] (Highlights)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8d3bb74aea0f14be112477e49f319cbf93e9da70a910aa7546374ce5affb2. 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/NLF712406015.