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 0x6acf257f97589f88e456ea72599c922b3f64ade5398f14d09df9bb1acff650f0. 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/4f7c069f-fdd6-4de7-8af5-b6c4c9179050.json and https://artists.proofprofile.net/proofs/artist/4f7c069f-fdd6-4de7-8af5-b6c4c9179050.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 0xe72a170a9f8e09280511559bef94cd4998ab706a60ef940eb36ab550e04c0a34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2449197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aa491712809b29cb84db40d0f8b4f79e9a73a858d3b2aa737cf504844f5fd8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2446569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d40815815a6b32d73de5c7bbddb9ff2abae9d31aec90fcc28ccaa3c7890660. 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/QZAKB2442979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6a89fdd7c10b0c38e159e9c41ebcf99eaf39a3944b6e758973604e48ded5ad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAKB2440310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c12e6b6848d7ce02aede4a6cb4419e8e217a86f02d397279b9eb1c14076a51b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2437634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a86df604d9068bbf190151a6afb67d0f63a8f62317feabb696d6b22794a060. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAKB2435641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ba17a3206d6b26a4c7e8f0466b94a2c0830d243b87a622e7d0e6368210798. 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/QZAKB2410469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941dd20041984d041dd91c719662ea2dd37ad669c559f7e0f2488cc40adbe8c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAKB2409251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caa58b54cdcb9ba1122179f323ac2510c2a9f43d41032a081c75d6907708004. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2402782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c0ede861d517465ca6ad55b8b2d26e8e948e581a6fdda5e68593e2a8db5a4. 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/QZAKB2368076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05077562c1ebf836c4dfa25ef3835d5b9995349d0cc6f89e51bcd3e7d8074d78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAKB2366780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bd5d1a1550d09b249050797d8964e00ca5c7102eac9db643b8d5d92e33268b. 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/QZAKB2366107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f41ea73947b235195b8f5317a64770c21690f0ff68febda0697b4d4f9bc9b08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2364160.