Dallapé is a Finnish music group established in 1925 by accordionist Masa Jäppilä (1900–1967), singer Ville Alanko (1907–1931), and percussionist Mauno Jonsson, who were influenced by American jazz mu
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 0x4ab85179c204cdfed2e1c369a9050d03a9caceffae22e2e29c12d48a40524a40. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc3f1f28-ef5c-4c8f-a2c0-1556377c8f7e.json and https://artists.proofprofile.net/proofs/artist/fc3f1f28-ef5c-4c8f-a2c0-1556377c8f7e.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 0x11214ea5edc0ab3dd788bfd3e9473ef5a49ea9ed27dbf81a575c46403e34604e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FIEFE1000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97074f7fb838aff7c100296c7fd60424fb5996350be358dc47b96eca44cfc891. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIEFE1100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b61f635b248f9d359d9fa1705cbb48fcb187036c2bcc7c2bdfa189e5b88aa. 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/FIEFE1100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0ba5a09b5500234eea689f6bb24f26a1b2b4e0943a341de65ea59817280f11. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FIEFE1100117.
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 0x575fac4ccdb6198cb3d47e88dfab6ae2258c32dd792f6243cc6a6048314ebd69. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FIEFE1100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91310808a6b9355de218b50ae4b7e2ea61646a987ef588ff2783396e7fe033fb. 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/FIEFE1100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e7cd7c12bee2e32850d397ba9dae8886c5615d8ad07ff1241a2abf6cfc7212. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FIEFE1100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c6e5c65b319f909dcf766766e3fc5b73f9844ebbbf58417664c792e6c9332e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FIEFE1100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0002b53921e5b0c0ad67e157e5e86adb6e395499d386d033054ced451216ae. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FIEFE1100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0040e86107d070bfcad2f9373ff8b9350bdcee704bebcb104ffc56172828a7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FIEFE1100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f47944b460c06a2b5adb96da9945fa8494ebb9c6329180276a77172ca27c3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FIEFE1100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1138d351f4c2f50f74660fc981d0987c450fe8b2a9255fdb64ddfb36936f894a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FIEFE1100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97027a03bf462c3da89d435cb9631a8af6d5970b11b0c11dfc37aec037c6b9ff. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FIEFE1100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7e592eb9210077b5b06e94fc8fe8034dc0d4cbdf00d71be78afb564fd52161. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FIEFE1100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba931d1e897f69e2c01798f633f49de2dae0f55d015891d0f81fc7df63254703. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FIR062500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61851d0e00427398d79428fbc748508cbc72cefee6790f2167fdcbed46b8d3ef. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:48Z), 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/FIR062500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52875f04359e9d7d1acaf184affda06515c9290a3865355a9dc494854f393676. 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/FIR062500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34923c50d9370a9c3ecf8f236305c1c53e64ee54b93515327beacf08ab07d64f. 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/FIR062500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3628cf08b406a33fe3d74d5625f3c63d4038155afffca077728f767f105d6a2d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FIR062500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b0c7a95f1fb84c6035c788811c5bdc62ee2e205e7bc3bc366001bc8f24d6f8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FIR062500013.