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 0x1c1b774105252421a589a1ba93d8b5d8028e3e87048c62570b9a8632f4d24980. 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/93b2e450-730a-4adc-a249-393741e09d8c.json and https://artists.proofprofile.net/proofs/artist/93b2e450-730a-4adc-a249-393741e09d8c.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 0x9e943207d51c8d07289805a9930adfada7d603f4acfb131b4e79485752875d58. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TRBDY1807203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aff75f8c5560555d1ab7f5052cbb85ae82b66acc5b26e35b5f87d632d8a7db. 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/TRBDY1919402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9d35522ee0c8224432bc191efb8d35f9b4c0bc4589f8b6eee3cbcc80d5879e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:59Z), 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/TRBDY1700503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377cb40f6febe8bd9a80936291aba4ec24aac2f43112b90f56a4360fc18d33da. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRBDY1700502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce4bce0377132c4d44da00b87da93377c0cf83ea5d663cc30b331d4f0a9b01a. 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/TR9522100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821948622a9a4a4fb57616adcb345c2ff6d7647046b65261411e0c846722b478. 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/TR9522100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2922ef449264ba4241985d332c331f013175f4315a2c879e0ebe8aa315e69ce0. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TR9522100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce4bce0377132c4d44da00b87da93377c0cf83ea5d663cc30b331d4f0a9b01a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TR9522100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f202348cc3424b74417b7bccf5e7537204a8297303eb43e27e7b006a3cf178. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TR9522100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f00397894300bf0aa065f604c029ff2487484b0267bb470fb42a88d26f9b955. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TR9522100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821948622a9a4a4fb57616adcb345c2ff6d7647046b65261411e0c846722b478. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TR9522100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116ea6757766a72efaf17cd57f007ec17d6266fda2138669ff1adf2ba80bdfe2. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TR9522100184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5914bc6140b3461422dc5d2c01265595f94e38cc8a0fa3430bc1800040ae4910. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TR9522100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48dfe1e88bcbdec5a5fb4ceb034785a1dcddcc2fcb93cda490059f85248a69a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TR9522100242.