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 0xb6433475158eae0b3e6e4a56fc1b62cfa89da1e0006134efe9f4973e506694b5. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/151c5596-954e-4ff5-b7be-d2afa8cd0b61.json and https://artists.proofprofile.net/proofs/artist/151c5596-954e-4ff5-b7be-d2afa8cd0b61.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 0x409a33cd01bf8749f6fe1ab31f2dad374c27f1c60a5a2f874ea52d09c444bad5. 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/QZ5WX2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ce649f28c60626d45e4b6fff63b9fba13e5699ac6a90d31aa5c57ecec77c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5WX2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70374684070edb8fd2c1fc0ea06401909af11f84a787353f37fe198e575cf14. 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/QZ5WX2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa0a3af7ff8f9338f47b5a5ab4eff71e72d80f98200e851db00f65cb5f22c8. 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/QZ5WX2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef676799ac72093399bca3119ac6ac57dbd653ba32eb9a802b3f26f18b85a9. 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/QZ5WX2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ed114122fbd3c55b15c72db08c0322d6e088e26f45f0f2994b6c524d0de30. 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/QZ5WX2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca52862c7f58fe43b68611c60fea542ff42e058053c825a587cbc2ae8fb5513. 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/QZ7R42250259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4da1ab4178053169505437ef93797ac01114f13e324e484f5aa365c3d422689. 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/QZ5WX2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae1c437d9065f528c99644ee371c136f3a44597f8d3e7d583a71a4d0e6d357a. 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/QZ5WX2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24759cdfc8cd2fc831cb9a2d1dba504617de9f58b0c24e5f4b3d465421280364. 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/QZ5WX1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3f07f7975e29b262ca8ad33ffd0b1e8c0dd0e8d631dab3edbddf1516f4a2c. 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/QZ5WX1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d6eedd922c486f76ec460e57f01c1a5eb31a600a87439b84226cecb35882d. 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/QZ5WX1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8472e5c14a0449c4cee43e0e40a02bd746c469ad15dc6ea2d8e2997ece4b04e8. 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/QZ5WX1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc2eb4cbbfce8e80365080d4ad2df0caab6955dd719e62732275f05406b8c8. 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/QZ5WX2500036.