Total Contrast were a male musical duo from England, specialising in soul and electro music. They are well known for their 1985 hit "Takes a Little Time", which made No. 1 on the US dance chart and No
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 0xc3c57c76da83d6c85f5d548c107685fd93a369924f51d0ff8716f50f14e45401. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21bf2184-7453-4f8a-b2e0-ec5007993779.json and https://artists.proofprofile.net/proofs/artist/21bf2184-7453-4f8a-b2e0-ec5007993779.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 0xbfc24920258835ea9338ea29afc0a3ad72b49d71113074577337e9dc1c0cdb51. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBAAP1812323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62aeebb9f0c94a2632ab0b08f67655222614abdbef3d178bca352b0f8e63a73. 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/GBAAP1812324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa7f3abbd7cf564ea0b618d6767d6fc8942c772e2fb61bc61fd42dd7d6c8834. 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/GBAAP1812326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e42dbd72f4411468f10923817712d1ac14147bd21a003d78ed51d3048714b5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBAAP1812327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e2061db840a0c8e24fdc142ab212369ee783ea822f7f886a3781f079557bb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBAAP1812328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932162bdc18d4e34a74973ab75142a290a2484a64cae56ddddedc21ff0ac0fd9. 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/GBAAP2100041.
Takes a Little Time (Single Mix 1) - 2021 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bef964b8e2bc65e053f8c54ca2a4630b3b105f93bcf0f97cfd3c24891de9d. 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/GBAAP2100046.
Takes a Little Time (U.S 12 Mix) - 2021 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895730530e8a4d092d53c5dfab6e96674d73684b050547ddfc08dfe46970a069. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBAAP2100048.
Takes a Little Time (U.S Dub / Dub A Little While) - 2021 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87b230f05a559f7c8b263fc7121f66c01585d9a39db4a12813966b59620561c. 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/GBAAP2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e0221f48bb6a8756fa26a3b28ab58c49e23feac3f2198ac505e1f500af7370. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAAP2100053.
What You Gonna Do About It (2022 Remaster)
What You Gonna Do About It - (12" Mix) [2022 Remaster]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9849d96ccd4a69e8fef24d2897d5c0c1447554d0a08acdaeefba154a5bac0b. 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/GBAAP2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc4dff5686d101ca8302b799d13c321efb914d36d489336d67660e9e689f71d. 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/GBAAP1812316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88579a08dd7b7b7c368d33a0620418c4eb1ed46464305c762270e655b6e2c8b3. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/GBAAP1812317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ca21b8d11d7762c8c8c73b4f5a1c6407a2143ee977c7b5f3fb32a2d002707f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBAAP1812318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808ceb58e8889f0512406df96e047c6f63faacacdfbef022692abcb1a9ff5fe. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBAAP1812319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0f6d1f99e8b3089c41b3f2714d8fc172241f00d08182335a0ae0834282eb85. 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/GBAAP0500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84804d80695d14037a8ee584eeb277f5cbf839c65c27630f126b8ac4291d17e6. 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/GBAAP1812320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5c96d0f77b0391698e580f88d4f23c2e8d9b31f0ad8f57fd61806056b2f9c. 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/GBAAP1812321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacd6d9ca754254dd2b91219ad6a2442e6ac10e1d6265850d3be8d38ea4a1931. 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/GBAAP1812322.