Tight Fit are an English pop group who had several hits in the early 1980s, including a UK No.1 for three weeks with their cover version of "The Lion Sleeps Tonight" in 1982. History In 1981, record
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 0xf447a7e144d006a31cb67d5154454f07ec721f50f0dec7f1529f7463dd781699. 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/184f5d40-9613-4282-8f55-dc5643c666d9.json and https://artists.proofprofile.net/proofs/artist/184f5d40-9613-4282-8f55-dc5643c666d9.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 0x9bec059c979542477dff530cf11441d99e87a5fcf65af9a16d598fafac986dfa. 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/GB1608500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a129d5be2ae42d229a20eac5a2538f2ddadd6fb9db35a453aa8c6387e2e3ff. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBEFP1610206.
The Lion Sleeps Tonight, Remixes Part 1, 35th Anniversary Remix Package
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d6d0f90ff3987537b9d011c2bead2a9f72e1c847f770e79f4d27d14c33578. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2591603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb72590dffa99b42c9975d61c2036a02f5cff779be993e946dd592fc7ff60fd. 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/QM4TX2591604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e8f2674315dd6ca75420de606f524f16aa5b50feed2babc9d852add19346b0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM4TX2591605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eec47aee4d94216da150fabb39990c2604f02eea573ae8eba677a2ce526cc6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TX2591606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c828a16547cede2d3d188a089e73ff7e691780f36a4022143b14167684f1cde. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QM4TX2591607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbc770acb100e3351305e5fb34f3923eb5d81f928b7461f824a590437b52697. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM4TX2591610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a812d6459caa0f9c2f98bbbea91fd2e024647d364515d4de2e36304a918a89f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM4TX2591611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6922008deb83865a47994b9d8782a3db222b9004e6a418f96b0ae3ad30fbf197. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM4TX2591613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275f344e3f952428007d2d63bb31aa549b8651b2519a53e7db16ed4606640bc2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TX2591614.
Waiting For The Rain - Pete Ware Musical Mmix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd78fbac9a8912e3390a12e251145df56b54547cd9fdfcb716c2cca759fb52cd. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM7282506570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ed0fb724342175b845fb553f6eb55bc6e6f7b590cdbf3482f4be4311dd3c5. 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/GBAHK0400117.
The Lion Sleeps Tonight (Northernbeat Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1a8c0d805f5bfd49d88a9f75c9bebec55ffda34446c7a8d66a2bf498644927. 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/GBVSJ1000080.
Save Your Kisses For Me - Klubkidz Miami Pop Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61d69a4336478ceead23388f977d2babeea6824fce3ff2c299c55f3ddad43d4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBEFP1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ed0fb724342175b845fb553f6eb55bc6e6f7b590cdbf3482f4be4311dd3c5. 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/GBAHK0400117.
The Lion Sleeps Tonight - Northernbeat Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8356f025d7f72e814e1610f2c849ea4daf5dc14e8ce4afc2ef0599415a852e. 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/GBKQU1361081.