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 0x34ddda96cfd765356bf504bc063d2bdabdad8bdfb5e38ec251044df11d3319c3. 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/2a8cd412-b7ec-402e-a042-085c815031a4.json and https://artists.proofprofile.net/proofs/artist/2a8cd412-b7ec-402e-a042-085c815031a4.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 0x6289bd5003ca6d30f5b37c5ee58b6b399ae51841a78314aca2bf09bd54d3c310. 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/CHF502200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa39e31647ea3169b871b5c3a925824bb3546b6c31126d7100335a233165b111. 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/CHF502200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755f38610f7f2b835e16e0ae51bfe51aea6864c009dbd42aa202b74edd504ec5. 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/CHF502200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ddf6bdf206be48379bae4c5d9e7e5e06c59e64ab29642e0802943f191b2595. 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/CHF502200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e83090e9d058ff0cde1ab27281723020d9beb2c2d383fab5515c69cd5b434c. 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/CHF502200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b2c72b3cf8d4068f24958a84e7cd803071d7698bd09866cd53546d89ccece. 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/CHF502200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53283f36eb3cd410ce92f18edff2aa565f37ad6b8aa7de861ce540bbb2038e46. 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/CHF502200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9604ebfc3ef5f780d95d49268858f81791a5d9cf6ce7b5027165a8347fb163d. 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/CHF502200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a37c2d69f07f9ee93b32773948e16e85193a0d38c16edb4a7bb37ec737c36a. 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/CHF502200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6965936f109d25e92cb11cc960b4e36aaaa66b4ad080e8f31bb2a6e984996514. 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/CHF502200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61483f7aad6fb675e4a66531cae71016d13599a59b673cbd3403f146fec211. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHF502200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cee235fe2c9d341380aa3eba3529f4d5d0afbf8ee8aa4cc18f5eb970faf0c21. 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/CHF502200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc0cccbb5f07f6918f7b53a1970d310d7bac6220fa7b16749a024d84f466452. 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/CHF502200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813d6a98477f06da169972e0c804fd691fa1bb071566b9cba774dcf4a344ec7. 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/CHF502200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953d7acbcae80c65e2180eb1436fae64cf129e598f3e315c9e69a0468db86521. 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/CHF502200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a7a367b9460d53056bf485050a40c15c041578a188cf194a9cb10d40f58d03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHF502200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afa1f009139a40b0b3e13b6f6cf53685852aca9ffd8cc65de73ac258ca53163. 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/CHF502200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6841cec7e13fd6670673a83d40aaa1c9e6cb2f625b1998df69fb196c9f8369f9. 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/CHF502200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b81d965bdb748ff845fbb9e2f6022933649533c789522359c5280dab173c0. 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/CHF502200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d892bfc61b306390e44517d073e9dad8a365bb2712dcb0c516e7359789b9c61. 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/CHF502200046.