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 0xac2a4f1fb638d69a854a693488cc54d6ca2483b32509aa177734d3ec5c8d0c5c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/422b29c2-1910-4fa0-ada9-a3078dc6234d.json and https://artists.proofprofile.net/proofs/artist/422b29c2-1910-4fa0-ada9-a3078dc6234d.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 0x48b79ea8a7c48c421b2e23ffc932948a317389159295e6a80b157d6a18228315. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFT2494199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169946a984081e1db6ae21e6ce79c54ba6d4846979860d7018c8faeb6bf1b1f. 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/QZNWU2511997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aed1ea236f0d21b0724dc3d45cda616d3ff2ac2669a8ad0ed0f24cd22de9a9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:24Z), 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/QZTBB2582160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee1aa8b913f26a11a17a47bbcf495a1c13102acd0cb8ef02fee9b5877c2639c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFH2505904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20cc5953916245c0a69543fbb4d68b0f019a8cf6f8b95e0e75657a3c1dd331c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:07:41Z), 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/QZWFH2508359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb659f45719cfdd26c795c4752ff467c72964584fd8e26a5367f526b2d22cfc0f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFL2590605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d88d43de576f0df77712980f0229e66c6719ee6501094f49f30a35085b882f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7M2529042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f76b02e38a1ea38faa44506a2d564aca04ec78c7d6af1b4ec411a6d02027c4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7S2592549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596ba6fc7220e37daac882f008180dc6e5861ad8f555c2544d8642faa458e2d4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3F92565167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b935f8284c2a3acc24ca81197d0584ca7ce2fd6707a945d4b50ed5d78d0d37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6EG2596865.