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 0x179c58ef6916c2fbea32d3320c0c3ecd5fbdccf117e8173333032f5efbe90552. 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/ddedc137-5b11-44a6-b3a7-030997177f0d.json and https://artists.proofprofile.net/proofs/artist/ddedc137-5b11-44a6-b3a7-030997177f0d.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 0x295ce52f769001e63b975767d61859378780cd3a650d9e443bb0a80e537a4418. 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/DEZC62378400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6362ed828eea1d306c66244a3a71c169ab9a4fbb40a5f4348c34c92eb4904bb. 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/DEZC62375793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21a6d52609da9fc8adff7c3d30bab3fd53df73cd2ee95fbda5d333ab73e4626. 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/DEZC62378401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03020f8eb561ea2f1a954841fd2a57ea521e052292b6b965178df2d7d19ff632. 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/DEZC62376931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aece9c742961e084ccdfbc6c51a42c54afc4b09ef8366396e8acff6440dabb. 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/DEZC62378402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cd6a4478739786db86165c7b925089db981b414839ba2c3eab94f03a0b98b9. 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/DEZC62378403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb9354c45804a0e3ada1418a4b699a5f65cfd25bf37ccff9178f81d12ec892d. 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/DEA622100347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ea56736f713756988e1bc5fd400c8003a9c42815fee7197fdaac16912e8d4. 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/DEA622100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701741e47f4131f9d7ed658be872ecbda12001e12d83f281999235403387a93a. 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/DEZC62377579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a043dd8abb6f51fed40cb37f4d5cf8c7d2aba05cfe198d7690d7e5ea377927. 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/DEZC62276870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ce5166a32144f56d33f56ba16ff47d43b9f684a463f40bb0a180ad9af5aaf. 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/DEZC62276871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425894cb164df67e7d20bae1abd844a96983fc17cff23bdc7a5ccb796b41b38b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:31Z), 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/DEZC62276873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b78dad6f844e079a2b478efa414ffc7b861ee62e163830893e58d33eff720b4. 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/DEZC62276874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac42aedfceb3f28f19c558938272aaeb71880b4fc7774609bfe4de58985bb2. 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/DELJ82076228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf5e3e8dcd78d575578776facf42a87d1114d940873a80b1b3e726421d2764. 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/DEKF22000594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f4c062512af827bda41e6a19aa6aaef982e75be11c6cc38b424f0d1b021dd3. 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/DEKF22000595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be01fd3f546dbba5e248d4ac616c4a8ccb3a29282505273e1ac1580b5bf4fdf. 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/DELJ82002421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49dcd9679d1e1f19877ac8777e90983679f822b9d6b1af143191ae4632f4807. 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/DEKF22000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d616c3ddd539e6c2e4c43c18c324bccccd8bcc2be430ceae0405cb4b3f2c68b. 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/DEKF22000597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f597daa433e69b90f881aa8f451aa77743a990e4b9b9b2deb5d1908fe8f3c1. 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/DELJ81752109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5885cd3ea2561cba13a4bd634b3da59879267f60bb009714b06dfc62bee9eba6. 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/DELJ81761163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c8678c3a02388e9b4decc8747cbd6fbc26f64996be2e6d92d37634bc4411ec. 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/DELJ81768007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9ce8d895c98ed4a6916825e42b5991f4b752abf9e59ed3f6531100add30934. 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/DELJ81768008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45acfa346b2a04339919f2a339103efa8ce9c92b64b56bf3c01611e3e5e2bebe. 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/DELJ81768009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3fd0157f8482210d61acb9270be5931da16179e055f81188461464c9b08cc2. 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/DELJ81768010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282c723458c49f16a880a2c42df282d6bcc9dbf5e365e586cb252e0a59229ea0. 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/DELJ81768011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab65b33e0160822d372edc4e730d8d084d20e3d83d64b1ec913a16e0330bd1a. 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/DELJ81768012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8983d474c1ab304056037e7d30fb78b06d3320171385fe5289712ede3fcc38e1. 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/DELJ81768013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d75366079f6359d8a387e3eda17347d8d34ed84f08f60b57836f512225ac29. 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/DELJ81768014.