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 0x38e13f8827378f519d98c229feef08680a08b0e9f71e4f858d307927ee1f2dfb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edecbe94-8125-40ce-96a0-eb3ef0063886.json and https://artists.proofprofile.net/proofs/artist/edecbe94-8125-40ce-96a0-eb3ef0063886.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 0x9a568c62b9b08d67c44de46c9c4cf644e56146178bf555a9ef3b04404c53a9c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZEC2322609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00718f2960c224e20ba2128f59dcfa5c6678d17d000505173f28671d90a159. 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/QZTV32351908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b29e5083730ad8605325ca90431bb93bb8067c7e11e278875b155df85a716e. 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/QZMZ92468673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61361f9921703683a28496be79d0576ea6435b1b2da5f8e5264799e533c8eb2. 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/BKP9L2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab3a3f6b5aaf029356da91cd4ebf60f26fb7474812e500fa3d00d66ba067d5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCWK42400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d917f3780135cc6b0e821ac1cd0d630f80ef684c0b841c8dafd0bf6327cbd1. 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/BKP9L2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fbe3fc9f84db737fc45e8df1b2e38d69802161377e74dca1f275502a0baf43. 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/QZTRX2428762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb396d7b7db95783a8bd8c2adf583b98c4ab90be6e2cb8c82e31b120c905cd79. 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/QZ5FN2461989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2479bf71c23141ca87daa2a98160b6f79c9baaad209fb910e759c65581af25. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8B2397936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98801975aaaa5dcbf360aca3bbc70084a7bffde7e311017db9ef54d1c364443f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ8B2377357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa651c11c1ccde45efb74024a8cefe6fa517e80d308740a1b9e33a364f78175fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ8B2316701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab89794f56944d8be94253d640534b66c2a6c5b1708d71d342499d3e81d8b1f1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWV32310425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c89853d96c94669a9ba0fed47c7c9e4bafa915b6627d2a93d321ab8bb873a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWDE2373643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a3ad08e224eae07fcfbe0194f2c6450955cf0a0961916df6f0c9f155292c19. 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/QZWDD2374126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda9568595ef67e9a8fbeb3c89950659ec80299aff4616753eba484867ffb47c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNJX2388868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a4f157b760e414987cbb6d0ad567341a90831ba341b21d0b3b8a5fd327f8d. 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/QZNWV2174588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca60d0295dfe3e495767cc188a05a18c8d35efb92295eec34486c6b7f60acad. 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/QZWDD2434565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397083122cdb191f2d86dff2b5956d22717c952ae836df31cfcc072f228829b9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCWK42400024.