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 0x4f2cd7c9167f987cdcb209b680e28f738bd5a5d39d45e8b295049d626b51d7fb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e4f0ed2-6dcf-4001-b1ff-1d3337027b62.json and https://artists.proofprofile.net/proofs/artist/1e4f0ed2-6dcf-4001-b1ff-1d3337027b62.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 0x0fbe77648db378f091d35ac6664d11e509d42b1ecd3357e32438da84ebe39b0b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN52115871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20746a8d172b065c11a09cc73cbe72a58b27256b4a0f0d7381b8bcf4cf7c6434. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBWUL2281979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394eadaf27f404bf504bfd017da8ad8c8fd9f020ffa282dce651184e45ec1102. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES81996406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e774ef5c1f17335f558895bc0e6a77e3621d8bb4a8b7b0a35b075cbfbbfdb0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBWUL2281985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d731e5f897c52c77bbe26c2261c3ff28766513a3ee19ebe5549989d9aac14. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBWUL2281987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9450d25aa1bb0ab7c71e6fcc4d90b62ba49cd2a55370d841ca86a94d3a2ae67c. 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/GBWUL2281988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483c89379897d653745aa27e1ddc5409e6ac61ea0c401d411269d3995fe47881. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:07Z), 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/GBWUL2281990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df69d547c101d86d2db17f9ffb4cb2c38c22c290b697ac2fca522d60f57720. 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/GBWUL2281991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09370a13b8f5cbc1c63de5af933958bc0c60ff338978fe46ad227a847c38dc13. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWDE2435153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb924f3871086c24306242322bc02008c8a26136203d1436d77f3da15e52055c7. 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/QZWV32495365.