Neljänsuora is a Finnish pop band originally from Lohja. thumb|right|250px|Neljän suora in 2013 during a concert Formed in 1998, it showcased the vocals of Antti Ketonen, earlier of the band Alvarn.
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 0x88be070fd880753c37d88248d2c6bb1bc60c3a07df29caa43135ee8acc6771f7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5b74b5d-ea03-4f64-9720-d8042dfe62bc.json and https://artists.proofprofile.net/proofs/artist/d5b74b5d-ea03-4f64-9720-d8042dfe62bc.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 0x947942f7e83f2e074ca5e7d66a188cd54b82b7972a7aa7672b62d484ec5bdba3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:28:32Z), 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/FIBAR0300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4a70dcc83327714004410aafa2b4735a31b088c042e6a6c33717a52045cef6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FIBAR0300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0968e4c4659f7609b1886282e04ca3df27ef138a5c3609f4244fa0faa5597a9e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FI3HM0700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98898e33be49e83e603960f667be57134f4ffee176c1ae0c9dba5c9bd13dfc1f. 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/FI3HM0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ba53a1c38ff39ad9f61180431fe60030e78fb8b223989e9494f65e407f217. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:46Z), 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/FIBAR0300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8962e01e801abf0e082631c26120308008322373ce618ea4cc6d6904bc8cb3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FI3HM1000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad3a16fb4367eb78c3f10babcd2c5166cc21db53da1bb5c551f7b46ca16eb9. 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/FI3HM1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bdf1f4bbe1d8be6a4377e240c518c7726567caab9ff725ce2d610092d96d39. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:36Z), 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/FI3HM1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d12cb532d892ff8e3d0b91b7f8239a274986c27c5167b919fce1b58cdf7ebbd. 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/FIWMA1300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b2e5f2c31b275faf835e800115d5abfd5040ac24b49fd6556b790767c9fbdb. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FIWMA1300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fab6c71b07ac0bcc93ca44e64d8ac9d5bbcea90fe3d59b853d59508fc32975d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIWMA1300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507284f4ef37c68fd458485be167f96d199c46fd944ca1c6c267708738f28cd. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FIWMA1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463b7390fdf425a7ed4153fbb7b4cf9ebe5cb9e64a930b6fca48ccb65085e868. 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/FIWMA1500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73b4fccb4c43a1fe4f4c1bce3c7a23320b126e5e3c7f337f053693435d2c0a4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:31:51Z), 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/FI3HM0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff9fa3187cc4c512896c28ebce6f97678a5fa5fd2b3023f354575e633365ade. 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/FI3HM0800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e8313deba6d5779239caedf622d7cd5019c10d0f70548ac95e3e1ff2881dc. 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/FI3HM0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94047214314ed70836a388691c5f54433c5b8d8a5249b40f91af0248f8252c02. 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/FIWMA1600228.