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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53559c66f9e5a6ca90d18c266a887c76b6bcf842c1ddb4520a52073f5e8c09e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a3dabaa-978d-4c97-87a2-eeff727858de.json and https://artists.proofprofile.net/proofs/artist/9a3dabaa-978d-4c97-87a2-eeff727858de.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0d3091014de8d23af5ad8ae54dfa55217a40e59e4dc537c5949681189cfce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COCM11600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1f59ca162776fd0d71b67d8dddd8cc9ac3c6abff4588726dfa9b2a1da3138. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHZ62059840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5ffe6735950c3ed3c3d55ff4181fd478058d711c024e18cfc81c14e0d3072. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHZ62059841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb1dbfd3378ed399d6d2554671b3e864cc29d6d1956a5a83f5b60cbead541d. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZHZ32190030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3fada1c8910873bc9a4aaa9867e74279062774b0301f631a3e7ed0dab0851. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:32:27Z), 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/QZHZ42105457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2079ef5988d1a780dad2846509cf7984b879e6d80d45f5094d5a29a6b00ddfca. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US7VG2170721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e12f98ad0467bd5d50fa336a1482ed9e4acefd520541f143e1828121f7c1f11. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTPX2216405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1f1854c4577137362aa2de01eb6afac40a5e802010c200dec62bafa2b8b2a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9K2266917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e59cac1c485cd4fb5990d44ce9ed1231c67893484a3bb1d1edde501beed986. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZW9K2266918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af7b9f4938ae8c41706480789ce03012d3010c7ee4338b7485461e5717650d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9K2235761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf827f54d5e2c92bb657ba20a3ebb4d1c144a980e2fae815ddef5bcf3b9c93444. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9L2285739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde813513709d0080b0fcbf520dd7254c4b5c864d5efe52f307aa5690846c7842. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTVM2248972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4f3a1f5a320461fd59b09fabc0be578ca7f85d740048ea7c66457798f7b9c. 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/QZNJW2429641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ff9ed9f6d2f974919e8aaa339bbfc9fb29cee5ffefab5c00e849b63087900. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZW9K2437231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f28f2d2a8488fb940d7fa234d6f7838169a31ecb09dae56527e19c09c30200. 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/USSD12200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f28f2d2a8488fb940d7fa234d6f7838169a31ecb09dae56527e19c09c30200. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USSD12200364.