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 0x4196e247724b0ffbf074d00874ed2ab3e580d381d326bcafe3ff0a81eeffbb3e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f100ecf-27cb-47c0-8256-5b8ee2dfc87d.json and https://artists.proofprofile.net/proofs/artist/3f100ecf-27cb-47c0-8256-5b8ee2dfc87d.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 0xedbfb38961cbf4d8c27216314b40182c6b7b6c11b01045344e8ed707c5c2cfe8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAUM72102138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c6750b1cbd945843a6392b1bfa77ab2cd603257bdeb4a57d7521065c00e9da. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:43:29Z), 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/ZAQ652400639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebdd4d65b452c1049d33021f88233b264d312da7f02bc34bf82e6e42e585125. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZB7C02400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ca7ef9ddc44dda7a3702336b9ac9085f3e52c0c8f3dc9225ddabfc9e71f23. 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/ZB7C02400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eb2aa3412cd3e091b6e867f51993f5ee70d8d693a15ffb84f1e63b09a95a1a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ZB7C02400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731523b5f6ee0e2a40f6fea215782f5e76ba94451cb92e6083753bc4f4b4c32. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:02:41Z), 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/ZB7C02400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef297011662cb7500608ef50745986490cc5b7e9ae7c3f5d3fd515e5144dcdf5. 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/ZBN532400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7226225fa1a9d2085ad05c3a2f44607087b70ff19de1d539ed9f0f0a110596. 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/ZBCKG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ba8d023aaf19ad4a09d01451e5c021925f68ff8a0337f48d07169688db8cdf. 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/ZBCKG2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1b72a33206177eb232be687e02a82cb15a40af230e889e83edc1e1ede6c6a2. 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/ZBWBV2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34df604a9c45457cd002fb188ccb9000e3c36ec6c8a923562b738043ecc83041. 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/ZAUM72300840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83563492698d88e4414fe68f3b382a23115251ba50df469f81e3a6f13d30747d. 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/ZAUM72300861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd17ab60f9b68ecd5c9d1752acdaf867f291ea4b0cf8a6636c9abc66b84d60. 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/ZAUM72300863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83563492698d88e4414fe68f3b382a23115251ba50df469f81e3a6f13d30747d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAUM72300861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd17ab60f9b68ecd5c9d1752acdaf867f291ea4b0cf8a6636c9abc66b84d60. 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/ZAUM72300863.