Seppo () is a masculine given name of Finnish origin. It has two distinct origins; Seppo is a character in the Kalevala, whose name is derived from the Finnish word seppä, meaning smith, and the name
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46a1bf857e660a9b48505d27c5860c80c55d22b607e1e581b5cbd2bda10c9f1. 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/766c65ef-4fb5-4484-8b6f-2407f52e27c1.json and https://artists.proofprofile.net/proofs/artist/766c65ef-4fb5-4484-8b6f-2407f52e27c1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf000e3d1c1998e9cb6b98193f16850e2009782c07f2b1dac5e6941a8c05e5a4. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/TCAHE2397682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc711eb5b4d921dbb06518e0d7b123e60d8ea79babac5f058e901dbb0dab8d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:26Z), 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/TCAHM2348658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd65f591bb50fd0af4f892f4809b121272e1ebdf47688bf4e89f0be15f58ae. 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/TCAIA2486155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c56e47f1d7df9948a115beddf6887bbc7a08244c7c65f4f8e8e3b84f7106b7. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAIA2486201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0927ff8ecc86fead3fb3fcf8542c07cd059d15e35a8378a75f829b72d168f32a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIA2493835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c77e1e196a0e6e39a08b634962b3e93f2b13b10d944665de0e8264614adcd21. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIA2493901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f5596252acf9a0e2bbe2e55d03bab9223449f6a73a2f2ee327260f14dd98ec. 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/TCAIA2494021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a430d87e0991648c91945fd3927879a438dda57cb9717ac284f4c60a31d4ca. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:42:22Z), 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/TCAIA2494088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbab5d5b6f0fb700c0fb97f057e7564a59cdd1ace8898bd1ac0ec0d7ad165eaa. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:46:52Z), 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/TCAIA2494130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcba5fc5f0b9a26d51fd8659086226ff0e0d6d614a41dca21afe532caf6dbdc. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAIA2496553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c521fe43529eb948f56a7a7cdc4c5c35fc95c351f1080aeb6ec462de22660d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJP2511957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46963941312af65d1a00c283197b77e5c6580387a51eb633b3e6cc843cd0eb4. 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/QT65X2560959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a4f3622e4b1f162cd77576e6ba973451aaa422d0bcb7d9b1a347e0913c1489. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT65X2560986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a63a86533e9dee5d1745a6c2393774411d247059a0a6e3ca4d0bc7e9bf4a39. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:24Z), 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/QT65X2561028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef37e3908c776f5ad0e8d1f5f69610c9e9bbbcdcbfd3b0641ebb8ad92a1928f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65X2561040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870ae0dd201b44a806a5dbddd59c90dea786b411ec86109eb515424d8a1ad6a2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT65X2561140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81de206c1837bea81a8f90b5c00f48f3c069c6e8d6ddf51b41c9e6bc8d8aece. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT65X2561172.