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 0x0c29719be7de6930a521ee024470fc4cdc54a0120c936275fd2a4c4711ebecd8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd1cd93-c713-477c-b510-9906434d8e0d.json and https://artists.proofprofile.net/proofs/artist/edd1cd93-c713-477c-b510-9906434d8e0d.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 0x177874edfe34d81fb3dc9c03695f6e0a8dc6b5e0216612a0cae6b27c8777cb5f. 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/FR9W12035310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc570325b80a46e5df549fac5c27d5b1b88f611b9d2bb9a88c44fedd0891ecdea. 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/FR9W12035311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f1a9ca94e8f2b02c333a447f4aa9c6b613462bd1c18d5b7049150540719952. 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/FR9W12035312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8004acaa5c246173bd89eb6c80e01a6de26dc54de749d9791c1aa179528a927d. 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/FR9W12018998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ee318f377d343ae002fe405442adccc5bdd05638cfe8901d107e9db3f5b4c. 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/FR9W12035313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c31d351720dcc63d89ec669b4d5f0b989aad261393f786fc9f42bb789899fa5. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR9W12035314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6883f3f5525c9fc085993ab843a9e2236303c21bd5f2d06faf65c25cd1b0b412. 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/FR9W12035315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d3496b322c2fcd0b7bebce03fd0786f3b755602168220f4b09c0cd38b90da7. 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/FR9W12035316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9998edc6673718251905845fa3a668bff4bf6468f1ee22abfb00eefc3680468c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR9W12035317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b01daee3d15e79382e3ca4d7f7097c4d54ac56878d88e99d1e2f424ab68ae8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12035318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449e9af5c0fb289c66b8a92258becac23d5d94e425f89abe3fc7d8ccfa994fd. 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/FR9W12035319.
Spécialiste mondial du retour d'affection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ed642ecb5d4d11f1273665a6689f24c415e75dbdac12e1193a540227a43c9e. 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/CAZ9G1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad637526ed0c5d0a32f6c57cd05fa23ad87a0e1e7b4b75bc93b9127cbc537b1. 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/CAZ9G1600003.
Ils étaient tombés amoureux instantanément
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f2fb0730cc26036aa207c2333c6ef9775f69599d24f98b5c250c1d2b064887. 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/FR9W11104080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23220f08fa0ee25a027140513f8f3ff931092b0af501ac2aa4a1b602addefaf6. 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/FR9W12327572.