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 0x45b4d630c47ac0ab912162ec36befa8fa1e07c3a93f3a4b04f25275d9bcf2417. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1b760e4-79f0-4bf6-900a-40f750e87a04.json and https://artists.proofprofile.net/proofs/artist/f1b760e4-79f0-4bf6-900a-40f750e87a04.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 0x881fe83e904fc09d01267881610cb12ad26c0573fbfd8e8692b921ec381105dd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:52Z), 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/QZWFP2471553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290c8e7a4840dfc7f3003cb1d88d6e597aa731a640834f5d1f4153fc2aad2545. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZWFQ2496712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa80aa40467958d1b4eaf8e2a9c86c96433463287c9672f1bc87d51fa9de2f7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFR2400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab6369b62bc95e567f5f3a43bea8e72cbe1f634f35019f1b2834ab25d04655f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:25Z), 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/QZWFP2471531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f3b1944d903d33032d89d736a344d3679fbf7f1db4054596b0f6bac5788250. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:33Z), 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/QZWFP2471598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b83f3ddb3ee1d66c51b6705793169eafd41fee9b89feff78061a7629b79705. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:26Z), 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/QZWFQ2496799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33319852b4922e138020df4d0d853d5174f3189c75b85ca6551a10e0cced1e76. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZWFQ2496725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d45786017ad80b0ed29530714bd69e3d8458f8f5941fb9eb045d0e111095ac. 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/QZWFR2400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73a87ce009ceaa7c82c1b7bcaa0796585032007aa3863a2c5a083eba7ded6d2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:24:08Z), 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/QZWFP2468652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67c4b1a0f17b32de814bce6c7d815c01543f4091e40c71a45cb11496a43ae1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFP2471546.