Marko Tapani "Marco" Hietala (born 14 January 1966) is a Finnish heavy metal musician. Internationally, he is best known as the former bassist, male vocalist and secondary composer to Tuomas Holopaine
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 0xcd1ea6f790bd68fe29f22b10f283a733879875559a4f3ef6b0871ea415b06ac3. 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/306ff2ef-51ee-45f2-9f34-070289f42d27.json and https://artists.proofprofile.net/proofs/artist/306ff2ef-51ee-45f2-9f34-070289f42d27.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 0x6947d563254367ed90733b5d415db82552e91b8922404b8761c61e9cfac26e92. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/QM6MZ1978094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ec7bbedac7cd767ec77b85c9074ec63ba68b3b5316e9035158e5b7bcb587f6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FIXR21900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f80e0035c334cabccde69229708d6bb4ff6c485cfdcc075bd97a596224ffdab. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/FIXR21900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557e362b0c1ba82927c211f8d19362664bba2c88936082a1b073f63d4e9afb46. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FIXR21900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49eedd29e667fb63a9571e8c641b86c01ac17df5683e51b1ed6e0c79587900a. 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/FIXR21000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2777fd7d5af9b439a9e5e1208e2c6521252ab7e781ac6768bda7b478a4230e84. 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/FIXR21000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca24ee8bbac88d0a89cee2640c3c9f7a9ce65fa3a9aeec828479de8e6573845. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FIXR21000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec419fc5786693945598f2d8aa263c266f7ebc77fcc0a3603818802c6327e83. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FIXR21000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a03b2ec9ebd3ed2a3048aebd41e529f96da47e13aed72157110eaf306dd68a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FIXR21900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc991b8ab468be2b66c4079768be254509418d337390e99a5c32f84cc116fabb9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DED831901115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e955fc1090b2a60c0c0d3a83224ce279132e7471572b6fb7ffcbb6b6a8cacf0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DED831901117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d04a7085a7d77e2ee84a95b603a35b32a5c94d265913ab4376219b36b4ea134. 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/DED831901118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992845eb4724db769b1b2345391e81dca8ef6624de20b916a723846373014fc4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DED832400043.
Puhelinlangat Laulaa (Vain elämää kausi 15)
Ei Yksinäinen Unta Saa (Vain elämää kausi 15)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32231b6ce0d43aa98f442f390a9c33a02f8950472bf1850f8c5babd33cfe074. 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/DED832400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992845eb4724db769b1b2345391e81dca8ef6624de20b916a723846373014fc4. 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/DED832400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0860c42f6cec482ba31b4cafcfdc1974110e114e4f097cce9e1de3237cb348fc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DED832400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3641500996fbcd22f4c0d2be7e21ed9042fd5619d4eb2d8450f7ab3a10f449. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DED832400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32231b6ce0d43aa98f442f390a9c33a02f8950472bf1850f8c5babd33cfe074. 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/DED832400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd3d7dff377c5b64491127d814f0f49f3f28dc18a1a19fd5adce6dd20babe52. 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/NLR491300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddf3421380edd192b63a1957db53a016577188d55343f7434e5228d03efc1b0. 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/NLR491300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff880bb8ee68e9b0ee212e48b6bf3292426d811bf852461739005ff715cc3c8c. 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/NLR491300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7e2cdd058ec0d9243cb84edbdf56f83afbcc167d027c4fcfa95eddb1c620f0. 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/NLR491300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e859cfa41a07eae92ebf5abf440828ae3de795dbb5fe943037043433b520f16. 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/NLR491300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c959a034ee7acd375c02d67448fd0c934223817e8c0314b64dcb073b9b2cb5f. 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/NLR491300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d7f760b3d916f4156e645ebd04ceced6e8d47025e4786f248fa959d838dacb. 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/NLR491300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea7921ab7f8b13615b4cb520d987a2e4f047494cba7a0269edc3a951864de22. 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/DEQ022105329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea7921ab7f8b13615b4cb520d987a2e4f047494cba7a0269edc3a951864de22. 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/DEQ022105329.
Whitebone Wind (feat. Marko Hietala & Petronella Nettermalm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee761c4b1c3d7b2ab4b2a43d477fa579a10d4196a995cb90dcec0a2a222f53a. 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/FI7S52300082.