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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80acc49052b3aaad41898d2c5254e772b3f78e3221a3b135c1701eb250e13c88. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16bb0eee-d679-4fdf-a17c-8cc71b09c690.json and https://artists.proofprofile.net/proofs/artist/16bb0eee-d679-4fdf-a17c-8cc71b09c690.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a677b798dba7c1350ca0361ef6022a4ec63183e301ec77f5e14aa5fc2f97d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2046685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd10d3ba5e0bb65c90a21e9e760b6f1f501baa6c1077418e3ec75c37b575be6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2046686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9856a35f0acd61a9a1b8962aaed9f4d032e72eb1f1e099d81bcd2a597a5a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2046687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f34a462700c692f56e0fa456024bbab15f88d0dbd627cb010d55cf72ae19e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2046688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1c38a9058618760394ec5597ea1706a9c339119d7e51cad1c43e4e4df075aa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2046689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77ccab297f48ddf1e388e3879ce096efa5ae0be2d5a2b58bfc84054ada33c2a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2046690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f63afa4d77d9ed7401a905310d43b7b40e6a240e28219f4ba31344a33e9071. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2046691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955c33f4d198ba4bc95cc681e6adbe372ce44eab19cbb5f130e0502f838b5898. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2046692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc8b68ba7be55e9bb8416e8dabc21ecc71f09c8702c53c754b5fa1164a621e6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2046695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6637ebe258c4a6b7acfcb54f657c6150bcef9b7ca00d59cdd193636ba91e8f4b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1606197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae94dc22df3302d78e63af6504d5155d1eeb2752a652b5aa690a49ef3989da. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1606199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4850d5ee958554570f86c68d0609a8357f2ffa3cb904e2adb3523ba0b10606a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRO222300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f07ee1b9cd27bd7a203ff405f8da0722b78c885070835d0be88f7ac17fbe7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRO222200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5a3ec207779dd5c0d71168a51beefc76e7c0b059b0d5f1db6817257bc96744. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRR6A2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad190b8bd645a0806167c386c0673539843c7bfac568344ad6a41dfa2c7c3b49. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2037217.