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 0x6cbe774e8d34e827cce8cd97914b663d3eb93573c47e7634b04b3a5702bf5dcb. 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/b2429a6d-33f6-41b0-86c5-c632e124d581.json and https://artists.proofprofile.net/proofs/artist/b2429a6d-33f6-41b0-86c5-c632e124d581.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 0x66b97d1ad6dec1453c875fcc9dd27fc9452f82d49613928363e3b39373df152a. 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/FR2X42506904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81389c4fa099d95c14051d8e6a8e6aeec219a91c4911a9f7645815a3ba88c5c8. 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/INC932251081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba59ff8cbe99c66263bae34fccf06c7c066f93dd9e0996a14d35fb590db47ee. 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/DGA0Q2499353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb60ea4c955ca7c5049c2fb8dfd5ebc5a186fa1fef208afe43efc5b97a345d7. 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/INC622219157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d384c35eb4bc4f4a85863b747891ed7a156be6d8ff58ab8cf6967b5f05b10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INA1I2408239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19689ae8674698b1992575e9bbba8632fed01a81cff5c11f521ef5e0dd197d08. 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/DGA052489071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6522e2532b10812a9d8bfe2c7cc2bc1eacc7d39cc9a6947605273a0a18ef6205. 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/FRX872427760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa700efb46263b658b40e204d8471e21bfb38e70b058159a5313dd8a27db1ef4. 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/US38Y2408609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8498dbb355f418fe66d007bc8a59a384ed4f427b972f88197b8944894faf921. 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/DGA0H2374035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db2ad2bbce55096ed850f302c6966d007272ad0eb3ae44cb94047cf6fb1a708. 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/FRX452356833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1237456a545e71582790f8453d544b70349ac27b008487e5a5eb4b42e417308. 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/FRX452356834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef83ecddb0c8543f06ddc81a7b62ba4881bee3169bb0fe75e46ec72fbfc9fa4. 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/FRX452356835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd786884b8e282c5f8f1a04e042e1711a9c33bd2869c59b1a7db31dde8a6f474f. 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/FRX452356836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e40d01154d802d734ea3105c1e1dc01c72436d633dfd99023e1f9401a2629. 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/FRX452356837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f0ad572ffd44084cfbf06bfe6f1d95a3d8bbec1c1dfd98da7b236f263be34. 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/INB942500109.