Eino Matti "Eicca" Toppinen (born 5 August 1975) is a Finnish cellist, songwriter, producer, and arranger. In 1993 he formed the quartet Apocalyptica. Biography thumb|left|280x280px|Toppinen in Pol
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 0xb1c53f2fd7995f79b1141ef4013fa57ade57f95c4aafde9b463c1218b4eea932. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd7c7db6-ec0c-459e-a207-b8d358e9f11d.json and https://artists.proofprofile.net/proofs/artist/dd7c7db6-ec0c-459e-a207-b8d358e9f11d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Black Ice (Original Motion Picture Soundtrack)
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 0x3ecb135f47b7af919659e68016ed1c9573c7edc3bf76fca0bdb12784875fa1c9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FIUM72400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f1c1fd3d8b8a679b1464b6348b1277a663c72580b6b034836ec9e6a8f0816b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SEVZT2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe040d9e7fdd1da5f2551d4a53c6a2a69bfbdfb11d7e5b422a5d54069c0c1bb36. 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/SEVZT2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84e3ae14354289ee61eab237760f599b92a339da74ed950ccf774b6b18b5699. 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/SEVZT2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6acdfc6189c0c5b6337851f8781a97442ce376254537ad526cb9cbca7c74c1c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVZT2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf714930e500b803a0884be0a173d4e2951ad39452f71fe00986c8919e707d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVZT2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae577a86fd9de178e8704c2c76f6a0ea2b3e815bb6880f49a818734aba64037f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SEVZT2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2177f68cc769f7ae5776d6aa3142977e21681b718b8ec925528c8071ebbd04f. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QMFME2322041.
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 0x1ff65c8ac5b2ec46186b0c05ddf9e79ca69cb01e35128c5f058d06dde097c743. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SEVZT2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f39ec6b2e72bb9d970ead3f9720e04d254921569ae25d04b0fd7dc5ef6adb. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SEVZT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2d565eb36715f415187a9b6c80c2bdd59748f20aeccba6d82725c29cf0dcea. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEVZT2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e9945006b2a985baf123e70aaca3c7461d7cf9bfdb4e4903bc0ec130cb87df. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEVZT2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa7db8d87d673d8f5142cb7032b069c05dd0b3f76d9aae4e77009d5650feb9f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEVZT2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5811c3f08053ca311e7f47b85ef0abf77f9f001d47c1f562831b5e05845d0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEVZT2300012.