Metsatöll (from – 'forest' and töll – 'four-legged being', used in Western Estonia as a euphemism for "wolf" or "werewolf") is an Estonian heavy metal band formed in 1999. The band has been influence
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 0x71aa22d2d9b1092e585bc08e41727ca47f48787b9ed575912517867e8cb3fde3. 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/3d38b1dd-b210-46ee-8edd-9ff39367741d.json and https://artists.proofprofile.net/proofs/artist/3d38b1dd-b210-46ee-8edd-9ff39367741d.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 0x9b3c8f2fafe46ecf44cf92a5f5b94b31888bfef92e1ca204a383fd5599dd607c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USL4Q2271277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8af55ec118c03980b5c3e668d4a9ab2286d955eb80cc205c1bac622f69c5a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FIUM71000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a96d98ea7133ccac5e15144f56cd8af82175d147f321567fe73025ec1f20f13. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FIUM71000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7448f55bdf9137c666a711f946eebb64759c39aaf5c464c7217db6cb8c463a73. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FIUM71000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c4f0c657119edc5efa5aae52a9cb981ee8138c9b5413d0a26482f445a1277. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FIUM71000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35cff50b00c5a24d0ada04ebc35cfa53c19ec6cf2c03d25b0ac52a0863f504. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FIUM71000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b5c9e3937b5d18f25ef525c10c3137df57ab42ba0d8a9b9c249b8d7c6f340. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FIUM71101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dfe079fcebc54460c7cd3bca4b4f8ca6db452b819e392e803808b00461e359. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FIUM71101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f263ca1421c5410acb6ea6a7cb2079bca1264a2fe39b29de168b5f8285c05ff. 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/FIUM71101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73c56d5ee1eee58e367eb10f29d227cd30e44c62e83834730ee8aedbf7da813. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FIUM71101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c8d020dc75452eccb220f75dfeef25a04cdbf6b6c8e219111b42399ec860b9. 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/FIUM71301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57935f6b541fd35251240f21d40a8bedf518acec29da9c7b6b69526da2a0d7b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FIUM71301082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97610ae113d0aca433fe92117bc205fb699e31fdd4f99a7f362ec2d6a05d35e5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FIUM71301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579a1e410c9064eddbc0b03f2a903671d2915900d5481c41588355fb2e5ea54b. 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/FIUM71301109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264bbd5adea6524bf7c7d214725d4e117de9694daca338c08b7d90ef8c7f781. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FIUM71301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea861846fe5c8bc7a3bc311a1f0b4f7242c65bba6c25348d587e98869d07059. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FIUM71301112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d824458dd5ce55a24fe87f110f7447bfd12a20fc14621c967b0ae34f7a166da. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/FIUM71500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd799bcee39a1a51d9f220aafe14d838b8ae1ec79f07cdae4da19ad2f2904c89e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FIUM71601066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdb96ad11a21929aa98e335bff174b24c5eb23498002653f1239ea3a3d02261. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FIUM71601069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ec6e3e6b114c39c8f218f5889ee512b0b22a07e30177f8f4393d0d02e007d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FIUM71500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7c2aac338cee6b06cfd0265ebd803be093348c2ab587ee9f46334b77c079a4. 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/FIUM71601072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de8aa011dcf80d1f8937c7416e4b1204cef60be6431964f6eccafcae15dd4de. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/EEGF31900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3daf7cf60d1717efec943f60ff2c77666cf44e1872c41d67152009add05f09. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/EEGF31900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ee867dead00462ca25369beed950a70a66dce388616101293aef92d55c04bb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/EEGF31900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c694fdd1b6a17002263acf629d13d0fbcc104547c538904f44e582f539edac4. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/EEGF31900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600b6b1e6126aac68dbc857428c8f1049594b580c8ad47f6b0661e8a5d29764. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/EEGF31900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aef755bcca882b7ea17fc75539d672b4a95f9796507b890652120834b90fedd. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/EEGF32100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e5e8f27776f9279d692648fee4eaa9a61902eaddc7b261edee3d2cfbc3e3fa. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q2122742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee3b8750ba0e1f5055d3b04bc1a5be8aa67ff28c4e9a302401eed6d0c1c2567. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/EEAA12510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88abac4045d68a02e50a0fb17315db2d62a53601bf1a542eff72f95cf8e85610. 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/EEAA12510002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b94611c464cc3a7c74252106d32caa1845c46f356ef3c84a5236dc4b53a9f77. 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/EEAA12510003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1439c85903df1492e29e69ece836aa9622e9b5ce6fe3ea2e074ff47c41fba11. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/EEAA12510004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d09180d798582d1bcb030ece8041d33a1ccadd5a29fba522be2494a0e680f52. 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/EEAA12510005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d783b94b7f5ddd80bd1f1752ef6ac3d0d555e2a8987f9de24d8dca20cfc1737. 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/EEAA12510006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa565ec3a4fa6baed929b7cc9eb054179c1e1d62f3acc28c18c6a76711e2e83e4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/EEAA12510007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e7c0c153498120928aa5ec18562f9dbc2d51e71a37d3b5799a320225e3f87. 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/EEAA12510008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1a1ac1fdee36fcabffe28977cedbca898740bfc5598a6e8d3bf87b1d9c1e3. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/EEAA12510009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac751d89db818bb2acf9c63993972b9662a1011e49f6348873bc46f3ae418d6. 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/EEAA12510010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45333ae47e2a18da982b1da8f1cf8b9b48ae3146f1be7770cbaf7a7d2a8e490. 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/EEAA12510012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1496f83dff33a9de81b0dbded9a504cfbed331c1b1a4c014b5c52f81aff5551. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/EEAA12510013.