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 0xa47bf38768db9434b9453803685ddebdf07e7b61f47f2920a539649a60986d95. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69359477-17d9-4886-89ec-451579857b6c.json and https://artists.proofprofile.net/proofs/artist/69359477-17d9-4886-89ec-451579857b6c.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 0x1908ad7179e7ab331bfdd6dbb434e75e0352079108d0902e74b6d596ebfde5f8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BKTQV2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec37e5b9bc8ebebc52a2b160123e18d272d26a69ca4b2d3417c55ff6ba4de1. 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/BKTQV2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1908ad7179e7ab331bfdd6dbb434e75e0352079108d0902e74b6d596ebfde5f8. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:40Z), 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/BKTQV2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1fdab671aaa50b2b1ea5053d15554305895da544d16fc22319b22db9e28b57. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BKTQV2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41af76f8b2ecb581efb4d06fa32f0c80ef9cc55a4f04ceae1ce0c108c650d46c. 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/BKTQV2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b65c04a6d76feff535e8f0d6803ac1a6818fe2288b31290495fc29a9d06fc5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BKTQV2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301d8d29b575a78a1db94025a2e8c99421176ad789922fc262e22bb77119cf5f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BKTQV2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525e324dbbdcabaa90b9fcc671b530164d8e3f27920c480c35a467539696d4b8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BKTQV2500005.