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 0xa67607778ab67a117cf1bf7d38565c7aec87533868af1bca763f4b6ccfc936c9. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/948e6ccb-8f6c-4fbf-96a4-b4d329d3ae59.json and https://artists.proofprofile.net/proofs/artist/948e6ccb-8f6c-4fbf-96a4-b4d329d3ae59.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 0x15f80e0ab56797124290cc976f41ff57bc0cd62001800359e91da3de1513fbfc. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZMEQ2563383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b4f2ceb844a009bc93261f54f43425c57368f16dfd723747df18cf30cc4430. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:15Z), 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/QZMEQ2563384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c8bf0c79b551fc82a794618052e814898772a1007669d1ee75642b87c6423. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEQ2563385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f872a981e075c5d52883d5b0a1a509d602517158bfeac10cf4bf678b5a344cb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:54:36Z), 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/QZMEQ2563386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb984d0a0977b0ef3b5db01730eb3c0f8e31f7836bc3325a1987bda4013c40f0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:10Z), 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/QZMEQ2563387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae4e77229b9f1c5e38a9301a715a891e427c1b28179904fb9ee9a23701c5b51. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEQ2563388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d7e3afd6c167ffe51085c888347a24e4be02830e282aa258408f4f8a5050a2. 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/QZMEQ2563389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d5ab9039eb5702ac467b8a60afa97b00d1fa70a73ac1473fa28bafaf2dc93a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2563392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3af77dc63fb536692fdcff59833b773be7df285da76b3e00a109e2911d115a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEQ2563393.