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 0x3584b4fe7e380a2a009efe463bc3dfb132db38460c89fb43c8be103b28111978. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b80d871-b8ca-4a2b-8d1d-1093bad0b3f7.json and https://artists.proofprofile.net/proofs/artist/0b80d871-b8ca-4a2b-8d1d-1093bad0b3f7.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 0x325b4e6ce103497ac15f28cce30c13206b6d0d652d8bd2efae5bcd0f6a7aed66. 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/QZS632546916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4c1f51081ea40f5d9b2ada52a96ef94c1eab4b3bcedd3213984da21e9268a2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:26Z), 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/QM42K2500673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e92f6f91930df2b2cb4f61222a17c1a1956a795337e6686a8fd358d7467e44c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZS642567978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0cf22d048615d0c43c45cb09d7b9e7d216890c81d6e9fb83285f14ddaecd83. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHM2593167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a3ba14f1d7f0af057183aa22335f459ef56262b72c842ae8976956f95abe2b. 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/QM42K2564876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6756e82fb19ff45a133ac7322733b122b440d037089eff447d30aac76b507c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMHL2570784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b6e58c1ffc8e04ab87452c42a9dcd28272826898c6a5b4f87bd4f859e77eb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM42K2578791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d0666ef2c3f8d98639b5ec33d32cc264d41c1a8673b2f6defa8671f1636e01. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZMHK2536229.