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 0x2009c7e5fe769c8023f60cc186f7103cc5f1b521cba2ad13f7490637fff354fc. 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/f7d20fb2-61ae-4e6e-afec-76b378bf3bf8.json and https://artists.proofprofile.net/proofs/artist/f7d20fb2-61ae-4e6e-afec-76b378bf3bf8.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 0xbd2e015009584c7c5fad58ff23f1330a964840f64a1fc769bd23db5f0a2eeef4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:49:40Z), 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/CZH681900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058b807ec794b484a26208b1e0eee487e3802bbee6aca4417b5a6cbf21c32b6e. 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/CZH682100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8b7e9132884328552503c9f9ccafa2d22ebb802c9943952debb67c63113a9f. 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/CZH682100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71f7f3c736e014dac016c017916807dda2dcc70f7f2d850c258651ea1f5b29c. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/CZH682100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f53b4c3c22cf6da60e594f081f759537b4d0d4a7d542532a827f6d96e1b51a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CZH682100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e69a8c5f455b68338dc4b96fecfdec18ca7f27661885e5eddc87594b8da177. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZH682100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115ba778a82dfb3c1d7eaec3ff6592cfd49df484473f41683a4b43fd4bfd33ca. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZH682100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acfa98b585be2fdf8fde90c32ec2221221c5fcce970cc8ac0229467a9e9b2d5. 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/CZH682200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a2642e0b6066bfa128d7ce354880a68d50cdf59922e2193aa873a82c2cd65. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CZH682200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52b7c67787b4ac321f7ac9f99c9d3fe4546862e8dd5b327f56bf0ec5e565e79. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CZUM72501276.