Wintersun is a Finnish symphonic/melodic death metal band from Helsinki originally formed as the side project of Jari Mäenpää, then-vocalist and guitarist of folk metal band Ensiferum. In 2003, Mäenp
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 0x2e25415a9d07749a0220e32c813b00a0309ea6dd65527a827d075c47bf51e477. 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/1124d863-2767-412f-acaa-bfbbf6776436.json and https://artists.proofprofile.net/proofs/artist/1124d863-2767-412f-acaa-bfbbf6776436.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 0x43ec9ebf2e69c115c97f8913ace9ac1f264dba434450f94a05e28d90df0a7a5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED832400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde7c39aa243f628004bb147cabb8c2f09039b18896eaf2e58581b13c479b1a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED832400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a41168938841910840f5562875928a6e4dfce1518a0911c12fde5131ec78bd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED832400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b7897ad60a2875bd9957463e43b4ced7a9b3ad95ef2a7a264cba960f695f36. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED832400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5f434714d6108a8254d6f3e593805eb768e73773bdfdc42c043edbcec16979. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED832400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734c63f8f8b95579134f25d1447d680d0e87eeda88a24f8b242e23964942c37d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED832400104.
When Time Fades Away - Live at Tuska Festival 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80257db83b8040b012e58326f601e256730f33ad8cc1a5b1503bfb69ba8c019. 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/DED831700625.
Sons of Winter and Stars - Live at Tuska Festival 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4de905bce16e18daf1015fdde6653da94093abca902f4d08ba3d209ab4af2bc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DED831700626.
Land of Snow and Sorrow - Live at Tuska Festival 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63149fe6c2af183c198793b014f3e5c6638f4df8b2717c9eb34a09acf1c10779. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DED831700627.
Winter Madness - Live at Tuska Festival 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea674a21fa593be78121bfdb0c07e206d4e1fd49c4f32b43b88bb594a018d0e3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DED831700628.
Beautiful Death - Live at Tuska Festival 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b1602c2935fc98be5ad73ef5e7a6e7cdfbe15a44c8e1918f07aed174421fed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DED831700629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b4ac038439b131a2230d537eb4c55c99940b5f6a57f753c2a145fe22308d65. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DED831700630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99373d1d7eaa473f4716bdba304eb8840338bbfe68bf88cc3f7479d2bf0819f8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DED831700631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c1eaa5378eb1f6975960cf38787c832eda3ca104e8414a7bbfdb47d01c1c7b. 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/DED831700565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619f628bf03457b3b5f917e0d526581695091d66554a0ac202abfdacf72de8b4. 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/DED831700566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e78fd661c39baeb3b8564120e017065d30837888dfb61109475cbf20c131abc. 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/DED831700567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd3928bf9c3743e249d0160a35e85b8d0c9bdb2a1d4adb4328fed1339ad7238. 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/DED831700568.
Awaken from the Dark Slumber (Spring) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67d65d90d69c5cfc14a2b800240da7f4fbc3f0c39454e620443cb3769fec901. 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/DED831700570.
The Forest That Weeps (Summer) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5884d8d6253f2518f19c977e7c3d0f2c4233aa203e5378d9d8f425c942b22190. 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/DED831700571.
Eternal Darkness (Autumn) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3f74cd018245fd492ad7a4c54d66b3c2300a2d838d7afbaba7dd6f7767509a. 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/DED831700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eb85578c066f7d93ddb667acff7854841b5071fffd38260465b13ec41faaf5. 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/DED831700573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a1fa1b2e8a8592f85aa087a10943d64cbfd6df2ed8903ea14c9ef4b7caba8a. 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/DED831200418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be9996216f6a6f2fc8f50cd8ad0d7c0d3ad9d2cfec8dacd3290582f05dde79d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831200419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fcd69e32ab303df871221971336462ff22b0157be3164122bb5a5f0d976445. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831200420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83219dd7511da3e32729a58b63cab50e596129dc620841a291a7507c0955fdbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831200421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc8519f2ecd84fd870858bc453f3955d8e11e4b6ceef085c6085ca52e99a4a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831200422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0331358491a320dce723605723ef72f99adad031ef34a9bd432bc8367d0705. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED830402132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f6329382e6672e9bdcaf027b005919b8812042015c5acb0f3328fcd6c4ac1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED830402131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977db25aff39835adefc12288d8dac4373f3b4e5d2b002a06e7d6e3d8b32b63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED830402133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879414cbcfdce24071c473d4b21d9a402752faa2a2b4ce8f5e7025876fe977cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED830402134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11926a56a77db1f7854bc45dee6ee8cc386d9c8987b6b3679837690a5dc0c371. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED830402135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17244fd36dad6fdee328bfc2e0974229a7be9aba5d5e6160d46a5623c5c08ca8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED830402136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c422d451d8cce63131941558ad31ce1dca6213af24ab56203a48cb915659a9. 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/DED830402137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891431000fc6a7c9d2969044bb7330999d80095f49facdc200e3ae02184a937. 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/DED830402138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bb652107fead4eb8e4a9ace12d3ad16b367298e74f23a17a2b5fd9129c415e. 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/CAM460406145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35707ccb436f7271fef7a68158cf92d10beee6e2f12cb195a6fbe79c664c7c95. 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/CAM460405253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4272f18a7a7daa7cba6893b044bd86aab4db3c36649b36a6a4201081a95066. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CAM460405890.