thumb|Dzeltenie pastnieki performing in LabaDaba festival in 2012 in Latvia Dzeltenie Pastnieki are a Latvian band formed in 1979 in Riga, Latvia. Their name means "the yellow postmen" in Latvian, and
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 0x847e152851cda5f7806099322ac85567cc245eed50558749bc5df4b306eedd11. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c8d2748-5cd4-499e-8dfa-d57bfe52fb73.json and https://artists.proofprofile.net/proofs/artist/4c8d2748-5cd4-499e-8dfa-d57bfe52fb73.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 0x6c5963da5ad00bf91be3b22f1d7df6076c75b6852ede9340efdecf114181a8bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P41405534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7692410e8030a43b4864b00db961f912fe1e61300fe2b54182786d5a927b8842. 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/QM6P41405535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d44d7c116bb8dc5d9759ac705843e02beab98fafb35fcff83941e5989f9da1. 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/QM6P41405536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fba8c44981ad9a013d791a2c9d9e955cfe86fb23e5de9bf7ae9976f49cf3f4. 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/QM6P41405538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d9dc12e8a701e82712ddbc7020490773e8bb70346f5722828f98925380072. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P41405539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110d02e2557c99acadb74b4de52548ac3347ed723603a672f1eec354a4147bbb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM6P41405540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b59a97511db2fb35eb1c39ee7c8e11d0dfcd47ee5033ca7a10c89bc92a23b6c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/LVA109900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ea406b6cbaf46429f7fd9aadf30b689fef796f75818c1e886af5117f6545a0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P41405541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d4822734651f33b2161f44118a1d30ce90de82f884da052993302b43a14e4d. 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/LVA109400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa096404182990d6f3726c485b5f868264f731182504f032f6b14c884dfa974b4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41405542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15be6800ac1b542dde43b98bd9adeaed79516957d87f005429663d444cc09300. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P41405543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a4d0257b503da9d3d5c41d8d763dc11322bbb073d767c852bb5c256bf902e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P41405545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862bc44ba27b796b88a9db09bbed578022508ad966149b9b5fc836aafe10b986. 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/QM6P41405546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bd147f0dddcda379c7d2c06201793ed9377435bd4153c1002397608b884d27. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41405548.
Latviešu Roka Tautasdziesmas / Pirmais sējums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b7d4b0c9fa860f5526392e345cb7b0addd8f1db55db6333aa831a2ca85a05. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:16:28Z), 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/QM4TW2036661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff54321f9c92364c311e532a4ea94794b8bb067c1db6c479c96f25e35509af28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2036664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d340c204994c2e8e4a6e0b9b1bc6eaac2cd09fdfdb644192394ddc841c3a615. 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/QM4TW2036668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af053b82fedcecc9918d4725236503a7ca9ccb85f73b0d6ac93164d5daec05. 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/QM4TW2036675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1c298356600a4a8f95602899a7420ac0ff3be99d937954b9302b6ad599b04f. 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/QM4TW2036663.
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 0xa16b00b0c805a51fd23ad312a59497edff6d28414e43e9da24734a84cfd7a378. 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/USQY51763624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb3ddc51b051cd288311357d227f578f3909ecb7cff0c767ed16562c674141. 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/USQY51763625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bae42f7db2233ec586dea3817cae19eb00d4d67a4cd1c5527edb8e51ba1fe3. 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/USQY51763626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcba3c50b5fd26269aff3386e9e356282f23349645e83564dc55ae539b018cc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51763627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6195bceac6042670670b5328345d2fc7ce239ad0e2a2cb50e591fbe7ee6e12. 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/USQY51763628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123550bc98e1d39d2af6532edf0d2b443a919cb63d5c2d61ea30e501312949a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51763629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442ec00c6f5d300b5f10a8a29254fc12da487053f1e48c2d1e97a21453550752. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51763631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba20fa397564ec4204c413d7e9f52668e8ab24581faffe43cf6a0243e958330. 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/USQY51763630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7925d19c6f02e7be0ec81df238757f9ae04ba8015ac1631bbd19cf179b2b231. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51763632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8e0dca11cca8fd04770c65a2bb23b638d0fec25eb6a1f0b149ba2d92511467. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USQY51763633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887e55d0924cae4ed8789a5d72680c0ca9851da0650ccde1d6668c570c99deb. 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/LVA109500376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e3564bc216b89391c1ded56a998d1e8b5d8a6d30f4d84c0b820469598225df. 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/LVA109500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ed29023954545cb8e5e6f07a255568ed3ac4014152036f7cd1b4f603a1b35d. 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/LVA109500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d25b32334ab7e4f8a5a52f9bc376f4e060db23574d6ae0d082d61cc4a22b5. 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/LVA109500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eee7691eb548fa04630c6c5a58c331e4c0f6a2bd460c7dd9bc03da7c96a665. 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/LVA109500377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c0d7f78b710b278288a3d290ddbf35189adce151fdb6ffd507ab5f8570aa9e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/LVA109500379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432c675927ed09f3081e83ab2aef72fa32c65c91bcbdfc367786c5a9caccedb2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/LVA109500381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc357cc5830c110505527f6f5ad779d06802124e109dff9ca1b46bf38f612102. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/LVA109500382.