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 0x666ba499d5a911157a251e111a3db615fd579330d1825ce6e3dcd1b296bc4d6e. 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/b789f427-c50e-4d47-8d51-ea238b24bec7.json and https://artists.proofprofile.net/proofs/artist/b789f427-c50e-4d47-8d51-ea238b24bec7.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 0x85bb6559b2bd3108261d4559899183e29271bdb9204ca55db517e08b6db9073f. 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/QZNWR2184604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e5503f184f4721fc68f97131d8f5eec60c2bc1de4a814c3c0d8f80c8bc2507. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6M2119476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97be0205a5d8b89a8fe56db8e2da443747a2ad5fa87c9c118fc1a72d3e970ba. 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/QZES82158838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce1106c06cd4621e2321819993bb2c7d8a0562a79fe9ccb8cce66696506c6b5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA62145387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d71aa17663d7b612c6b4b1eff7e4326826272057fee0b4f3dbeea033fa51ef. 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/TCAFD2014313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed399649195bc66794adf1f89acce8fe0edaeb2483b75044ea65ab69c762d21. 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/TCAFC2073444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef465abf90614b70601a2bb87e4398a3b4afed815be175da3ea0665474a2ad01. 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/TCAEY2002445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8b7f73a21a02c6f9daa7a30661334a0e394ccbe2cb6bdb4f66d618f2f1e7be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAES2025423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760beaff428802ff068e5051e4595e08a77b63bb3f2c1f78ffe9f57455ffa0f3. 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/TCAER2077370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20127d5543d4500945a1a24e0c7002aa5dd76a8dd0f841802d12bbbe6625b17a. 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/TCAEQ2082080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e463a3a78de89519c326582a597bfd8b3d70739a82ffdb643da25e67643995. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEO1904851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49372b7d92e3bba11621e1d190d579316810281239b6055551b7a175681dc71c. 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/TCAEO1905060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c8b8a80c55c3674d9bb0a266849d968935e05122e5e9956043dfcbeaf319c7. 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/TCAEN1901179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255926a951eac6e436dd639fa974c24b5df92fa178eff7733921c3af7c287c73. 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/TCAEJ1984877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe606fbe1746f75036f63008978b06b969d60a318c3ad4641f765398ce2609701. 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/TCAEF1981682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd58d4ac2932f49a2bb7284fbe171277283f97b582bbd1efe655ca74d8d6859. 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/TCAEE1913246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43751b38ea1cddc46ee98c2f7c0024c90c2a41ad64fc41a969e540c6c2bbafab. 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/TCADZ1846840.