Untsakad is an Estonian folk music ensemble formed in 1992 in Viljandi, Estonia. In 1992, the music ensemble was formed under the name Rahvastepall, but was changed to Untsakad in 1993. The ensembles
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 0x826f5b273aea6cc89ca01762ecc0341a1ba3b1d01f272993b57dd06edb573519. 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/c7d57fc0-dccb-4dd1-9052-6bc62bd3c11d.json and https://artists.proofprofile.net/proofs/artist/c7d57fc0-dccb-4dd1-9052-6bc62bd3c11d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7b2ea4492413bf75aad6b0bac604acd471e73171891f72b7a0a0a36b7cb9fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE62M2268916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8fba3bb3d363fe9744a587209e4c1adfc3e2a2a309b830b072dc362280c72. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE62M2268919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc8765e6157a8ee5917d00116956b51a878eed27a86990fe835685a5dc6228e. 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/SE62M2268920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7dfc4671b4d46a322f765b929d10ca30fe26bdde547da0dbe9a6ac44eedafb. 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/SE62M2268923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51aa9d7ccbdd692956b882074aa3cba6d58894b9b302f9065023dca21aeacf0. 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/SE62M2268924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4426dcb9a252583170cd2db903d759242a650fad25dc0d5846d4612d59eb4027. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:49:59Z), 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/SE62M2268925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e24188fd718c51546ccbe5396658ec270fae17cc962204f6dad4a9a4e4aa9d0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:31:57Z), 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/SE62M2268927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8b543caae7da4d670bd46c6be0d29a1b50aa351204fb0e94e0c409b7e85784. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE62M2221164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f46db0c838fa33471540a849dcc3de9d25a39befb8f223bf7f92bb0110f701f. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/SE62M2221165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb957e32a3223d6e2049fa49c5e98cc3be61504204f0e5b4a02cb9bbf55911a64. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE62M2221170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9751120664dc84e496f927afe0b0cf3ab45dd7238d85d82eced262bc12ac8ff. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:57:42Z), 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/SE62M2221172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83969e77e565407b70cdc7e1837ef8108c64717275ebb3cc605d7e0a6ea7644. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/SE62M2269034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99686672f52cdce96458fa047e19a758f7f84a998518e0ce82a2e87f4bef4887. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/SE6XW2380430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccc84982cfa9315aa897e298e5187a5ec4f13b425850f0526c63513a200905d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE6XW2353100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e5edfa105be1b06d24294d9e26f62f4a7ed735f30549f5d0f45185abfdcb7f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6TI2387553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b66667b960244c1b77cca5587a0c04a6dd60c5119cdd33b2e19e83c4bf95796. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6XW2352282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46969a9267a41082d79e914d5fb53220f007a488426241107678a2392a9c5185. 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/SE6A92128698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec738f9f65a9b59a5a8b151acc3aa88d0c865558a89278588b487598a51757df. 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/SE6A92128699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056f79063e10cf4b40c0ff46033278ac820b28b834c725b8f9ac6b2547901c0a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6A92128704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb625975798385c79cc4a80345f921f9c2a0a9ae3e015c2abf94af1f9b8a8c0b7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6A92128706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5c3d2ff9ac648b040637281bd11f068104ff321281d245fce46c71a95cfda5. 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/SE6A92128713.