Sleepy Sleepers (commonly known as Sliipparit in Finland) is a Finnish pop-rock-punk-comedy band founded in 1974 by its two front-men Sakke Järvenpää and Mato Valtonen in Lahti, Finland. Between 1975
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 0x4d2afb568e76fca66584503c809c0c391531d5f3d2ea629859303f8e197b44cd. 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/bacda8d8-4cce-46b0-9aca-2ffbba764adc.json and https://artists.proofprofile.net/proofs/artist/bacda8d8-4cce-46b0-9aca-2ffbba764adc.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 0x34b7a9c32ba15d37217ec0e232f69df1d0bc1db3ff6f65ecd695a00bb5430188. 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/FIEFE7600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecbeb6300d646b71b2f23930b945a345c59ea1c4a4699abf22e4774d5ead16. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FIEFE7600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4415421eeae7dc523142bfc2ca1025c3c0a5a03281856604102a3523d24079be. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FISMC7800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24b25e62941e3479d79d51897aa605b537a5840e10b26d6b847c27dffc9714d. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FISMC7800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde62277d29461e336924a3f07fb805d2417d13747b4068fa9b8a7c472d81290. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FIBAR0800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6969046df14552bf1853b17c490d3066ac1bf2274dcb3f4a1c233c8f9f01ffb6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FIBAR0800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde17dbfb88fd24c0bab2977d3e37c61053b1ca6f35445332433b91920e11256d. 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/FISMC7900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c7dc0f1e7c24c5c85ff59439afa06c5e4e6f8c21b9869be9cf90a819e20074. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FISMC7900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7728b18267596237b8ef95392692d7920afc8731eb38feac648fdddfa1fa83b3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FISMC7900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98bff3f40322be2d87c433f4713754fd993f6551c9d5a0c60a6d55c08b2b8be. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FISMC8000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba584aa359c2046f2aefe930f5d8f79efbf70d477278e4045a8ed14ab5cd8c6b. 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/FISMC8100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a69f0bd2f5b858f2392ac1a8d4bf719977574f852858b900408369ba00effb2. 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/FISMC8100036.
Sleepy Sleepers sings Matti ja Teppo (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b0b0c1be1b00002feb8073e111565ccd7fe649f0347ecee60c2de057385a5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FIJKM8700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87408d10d54deb8b54601b8d1d151ee5cf84e5d8d3737124201ea289be200e22. 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/FIJKM8700505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd3cb1963ff9458bb405bb02675bfad9e4ca767e04faf5f67d982b78d2b1a3. 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/FIJKM8700506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec518719aed6023e0f8af10c9a3eff2a4e6891163e754eaebf103b15e58bed. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FIEFE7500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c3059f7b9b44e0771257c4f8ee3d13be3180f74cce2f72f17674f89f5b9b3f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FIEFE7600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b7a9c32ba15d37217ec0e232f69df1d0bc1db3ff6f65ecd695a00bb5430188. 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/FIEFE7600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3847988ecacc59a6df5479f3ad692e1e97ebaff54b664002633b9f39b544dd2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIEFE7700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc087677e25400fabbfa7c77daf43de45dfdcfd4d138c4fd83f0f73a526b7daf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FIEFE7700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6cad07c9c0ab838b79477563e6bf2a147ac5a33c6843cbfd2c514dc67715d5. 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/FIEFE0100227.
Liuskis Läyskis Lepakko - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529b3930597c394407259bfa47e2139119a56baa22b8b6a16613416c9cfe49cb. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FIEFE0100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8663adf5443a008c2e3ba7768fd6d6fce753b36231b156ea4a35eb45e871cc3. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FIEFE0100238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba40376c5ba58d81a5640633a1bffa593f8403c9cd7e7bb4fcf8eb79d9371d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FISMC8600500.
Sleepy Sleepers sings Elvis (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531483c0e1f1c2f9bd4a2738fb6cb82e528853ae7b764db7d93fc90f7619c8c4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FIUM71203029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ad5866b06187c8ccdbdca2eb52aa1b5a450ad12bfdfc2a0e4769fc0590d64. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FIUM71203030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cce41279d5fbb1b7de7e78e2bb8a6c3b8ad2a58578ca4bedc53d5698b587a0c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FIUM71500462.