Metsä may refer to: Metsä Group Metsä (theme park) Metsä (album)
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 0xf25df92262503aa90f1057d441defd20cbf092ad64f6a3469aa734350339e100. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bad91835-cb61-4b1c-ab01-4e6e404b42bd.json and https://artists.proofprofile.net/proofs/artist/bad91835-cb61-4b1c-ab01-4e6e404b42bd.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 0xb020a78d27f8d57297817647aa8dba1774d239e3acba2cda72153b63acd1130c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBCFB2000591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7526481ca87c6c5eb23f3d82af1a8472ee006f7b67a243ad722cc2a1ba135592. 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/GBCFB2000592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7a739b67b8ea2120e1e6840370f57ccb477879855ce78454380cfe238e290c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBCFB2000442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8428d966ce9201e7814cb02c8933dd692bbdf35e3d7ae64cae15c9a460a4f845. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBCFB2000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9445bf7651c374d80c2751dfd3c457b99e5e91a6c55d3cf502eff0677a63ce1. 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/GBCFB2000593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a161fdb1f62174e0cb041bd65805778e18519b5c68119c5b1d0ee2bc012fda. 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/GBCFB2000594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e3cb6b810ab780cfb6691668f0d7c983ba0848364dbb7e0b6b8a33c8382ab. 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/GBCFB2000597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1fe6a62f04de450a188b1c2ea4d71ff70bb5424ed81a626f13ea55cdb76c00. 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/GBCFB2000595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffccba04057d90bdde97e050b91ee21bdec34233484e7947ae569464b22cbe2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBCFB2000598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676bcc7e6eaedf78c51ce77c805db7333331a03344d74939dd71bfb899a7dbc0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM24S2001971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9399bd6dd3730c91f8ba383cd7e4ad8b28e7ffda3ecbc4818211b6f7e41a4673. 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/QM24S1918359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd404bafaa14bc546217c5c77a6b71a9aaf25b23953811847a5edd882e790dcbe. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCACQ1640624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35880d8298cb1e68faefc254318f191d556e1458e719117197a78390d4424491. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMWZB1610088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808d61709f292ac4596e77d0bb3978674a296ba57158f27f24d76d18f80c107. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMWZB1610530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4109069c09987611e9cefa4c131b9a0a4d9e3d8c277c413388c5085fbfb75a3. 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/USQE91500948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad734ec91ca949adde59112c9cc43faac5465bb3ee139ff69d8082ca0ca9c50. 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/USQE91500954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52da7c29e84194f4ae561c42f35fdff6c618eb4e0e02f3f7d5f6a9d46e1a6d50. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USQE91500955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1cb4d245f7fb37766713b5209f38bebaf9d2be2adb9646b7e4dc315f34ffc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR59R1656356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70597c5812d59b34834e122c67ce7e8f6036b0fcc48e5d7e23820859b046e2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R1656357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe33d7216d6962cdc55bf88fea5680538df9193eac70cf3cb4b46b38682f515. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR59R1656358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc34299e277b9570d39fb814f02581f94b01e461c7548bfec12478a790baa28. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR59R1656360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8bd1a90329fc8c07e5734146881f9302b15271d9e4cf91bc4c90c6ddcf72f5. 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/FR59R1656361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b722fec9e0838eda0003c33977649248b449cb848ca8b2e095438e815ea3731. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR59R1656364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98974f4da378973fca8dc5e10ff24f192a6048bd7af2dd9e326bd27f4c8680f1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLV61912180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a5d7ed915121d165fd50a63be47b6f806d7099a64e96a35e3f130ede410457. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLV61912182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa46449b65a62cc0155054fd68a8e313701eac382ab970d726a40040e96ec7e. 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/GBLV61912184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449e17094cfe3ce1ba27525a0caf0eb1c039539a674f2fe2560b051d1bfd6db5. 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/QZ8QY1700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeb4f9830f1f6f19c9c5212afb92466c6484a7dadd67cd37bc4f073bdd9ca8c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ8QY1700042.