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 0xa542c57fd66951367f04f594d31e06b7d04ff14389fd5559f1973bfea12d62c7. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0332a6f-2198-4fc4-8d6e-035b8ee973fc.json and https://artists.proofprofile.net/proofs/artist/b0332a6f-2198-4fc4-8d6e-035b8ee973fc.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 0x7995a2359063223f39bf62cae1247d8ffc27f5f71f8bebced59ab02753bf95d7. 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/LVD261400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b55d86e6ec262a539375e6342a793f83d8815f557027a122769cc6e5665a8e. 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/LVL152000559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa541c29aee8098d2a36c3c67ef35f3569b5e70af80e62c8ace09a7c048bc6d. 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/LVC911400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527568006c13249e55133eddfd57a97c329bf6e21967f9d94964a29f4108cf98. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/LVD261400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f815ce66b6df46fc3340bea27ff83794863861f024ed503639b77d25c05cc2. 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/LVA100100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb806c731b9dd7d3fa6645994e585491357c5b7acf6f450930bfb27bb092b9814. 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/LVC251404189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b52b849c3932f7f53073ef14c8bccbc34787709e4eb9363ae5f0ea814a678. 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/LVC911300034.
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 0xe36b8f66755a0356604bef0c38872f08a9ab3a2ada0d6d1093dfff3ad122a412. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/LVC911400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed3d050a0fc8320f91b8d4745b9bc2f676bc97daff1c740bf07088778143af9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/LVL152000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d152d47a27bc5eb46e714e4860a94267236ebba60b5bcb0cd33f93649fb3b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LVL151500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f768768fcc078c78f0f08bb13a464816c2bc9a9404aff72b8ee493820eef1b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/LVL151500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e4b4225c1665edd18e30635ce9ad3b0250fd43cc637fb3f4c4458c02c9b3c5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/LVL151500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9a7b30aa10869a1889c7885d79652b34cd78d3f4a04c11ca3ca743d5e4ec6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/LVL151500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac4a581348b8cca6b563d4bb1ab20c3c95ccd7ca4d4dc0d67ef6cab71610335. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/LVL151500289.
Līvi: sākums / Liecinieka spoguļportrets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b27c3b44dd9307e138b3fd726d033d1824edd202dbbd728da7f3fb12b9fd66. 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/LVL152302521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a8f31d76102e5b80bd7668ad5c250cee5334e5eb81320a37185014a09ad01d. 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/LVL152302519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c536b778b3aeb40d05cf0c85d002aff0f50bfff5ecd600774dc8a8006a0a3a2. 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/LVL152302516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adaceeaa8882964ec7887924c6a4b8c3bbf3810a63520ecbd3fee567c44168c. 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/LVL152302515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7eb0b1efb2b804bef0eef92bd5b5cd95244689ffde05156a30afdcaab0e72c. 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/LVL152302514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d73b154055a26d485d28e7cde82f52360ba682329f1b007a186c21b589db5. 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/LVL152302511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd05e097b62394f021fc4a292bcf1008e0c2f94b628ebc37752808c692d8211. 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/LVL152302510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd72b4d7788e43edb120da494d504a64b36b0691919c2f591cad41aff78bdacb. 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/LVL152302509.