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 0xd1216d97dc806f97fdc500e633727cdec2c3a27342ba41054fd6bbd5133ab0af. 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/6a4fddf3-419d-4385-a748-7756e3503490.json and https://artists.proofprofile.net/proofs/artist/6a4fddf3-419d-4385-a748-7756e3503490.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 0xe92bcf578bd5b2c18ae4fa33c3ca2b1e90590af0a9d2b7fa0847001798a2617c. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ES5621350047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb97558ccce1b2b345bac1fa81b7949be55eefc1666ac066e2d8021aa014b111. 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/ES5621350048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020abf958bc19f361ee245dc18d602e27b92ed52b17410a356629ab91e208d96. 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/ES5621350065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9074394fa56f54d02ac72f9beb564ee16ccd033e4a44041ecf8a97edea0aec7c. 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/ES5620902783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d0c1bdc55ae69084dc5e0779b1852714af6b876dfae860e084a0b3ad6b9864. 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/ES5620401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19beead3d8642c5ff1083f026b38b11b68daceb0b2f782f856529d6803b08aae. 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/ES5620401363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6c1d64b84ea4c3e8d7380e232711da39244db5508383cd5a7c64ca0aff4c4. 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/ES5620401366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f104fb2a29dfb87b9c9d331d28518af2dc20d4197cc199dbbf621d82e44b4. 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/ES5620401368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25a9a873f3382fd8d6a7292d624698919d0abed20c5894a743aca8e1c37f6f. 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/ES5620001032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f6cab743442c69f6cec64d09791d05aa012acc72ed10f5aa1a21c1f528af5. 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/ES5620001035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5062d08f21570e7ec7d105b687896d88d885f2a2d1d4c3784f923dc0adabbc3c. 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/ES5620001036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98fda706fcc43a4c364aa13948827c3bf4f2812a625c0e7a8b4c483d19b1c82. 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/ES5620001037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac921c93b9bf095f835881add81c00570d8d88d9f8d9cf66d7af2febc0089674. 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/ES5620001038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3627aabcae52bb5e528761ceb3a920732f7cce5255637afbb4bf811d2cc7cc44. 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/ES5620001039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c78ab67afb2cee9034bc93d7ce076220ba8bd3f232d04eb03a9206a20eddd. 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/ES5620102324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6ec0cf1454263915add630dfe6cf85774c5d7de8629cd11866acd5896a77f9. 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/ES5620102325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da7733c905b6c49704b32919169ed5d5f159ac18803a4ce57a1d5560ae51a0b. 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/ES5629902304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac21a99396d41b968408b43ad116edfe53f111e9249c994340a0ba67185c8dc. 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/ES5629902305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a180ba139c30f7425cc826b9b251a4a1a1f2b9371afef7e666ea1171c92f6d9. 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/ES5629902307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8c6f233b8ad11f3dd1a8be40c034fe3bdcd08a9e7b5ef1e3bdd8f6b0ab0e7. 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/ES5629902308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f013e017916f27b0628a46d28af4ae8445dd2964d6685ec4b3b233b4f715ed8. 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/ES5629902309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713ce7bd1b283fda96606528c5bc47430d51a5965769c5754de110e2180552cb. 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/ES5629902310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccbcf52105e3c45d8163a01e8a624eeee83eda216202a55e791ef80b2cac47f. 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/ES5629902312.