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 0x6833989318d3a203e1f5516c41a01eccb524cd5dcaaa8d09d11ea619cc5356d3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/786db590-06e1-4839-b822-6c3db2ae813d.json and https://artists.proofprofile.net/proofs/artist/786db590-06e1-4839-b822-6c3db2ae813d.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 0xff1065b2fa179079240789453c7589b41b368f3073750b172f5bb35e2db0f207. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHI2339197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08506790b1d1d530ffef3c2e7e73fa2a8d363507223e9b38bcd7e0e2af55780a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHI2339211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d67b70c5882956e6cb378f4613c2023dafffb9ff28723d6f8410ee7683e564. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAHI2339224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9e93974be5469d70a687a3f8a183a84c5a42d3145177a7236ac524393f7800. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHI2362501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b3f008156974750760265b1906fd15f936e413f32d6aaac2e5b7e827d121ce. 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/TCAHI2362551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c12b717d6c4694aa59e3c718dc1f9835d467ac0229ddecb145836c6dfd17fe. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAHJ2324593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36821b1b710791eabfe00a7fde307caead43000bba8f815df3ba873d4db15d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHJ2324603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e229e6c6d2c3fc3081303755a85eeb39d19ecc12c0f995ac4727c59aaa91e2a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:34Z), 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/TCAHJ2324614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b411752420b07f911e19dbd357faf6a165ecdfd809984a994c63c0169e966d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:26:14Z), 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/TCAHJ2324621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da69adfd67b868e87ca6646ac392212dc34cef944a15a0de904e2df4fa26388. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHJ2324624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915f0bea705b9af421154b42fd872c988adf72fe0e1ba8317945c1c6590dd58. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHJ2324625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b41c3359449a0ce3f87e7502084b159d30c4a599fc67eb5bb6508dda3a1a28. 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/TCAHJ2324644.