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 0x2c9bfe8cd565912d4a2363ce55f7097b6d54fbeab100679682ae7a82bf751911. 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/8f3957ea-044d-4ffb-a141-7c8f2dd99945.json and https://artists.proofprofile.net/proofs/artist/8f3957ea-044d-4ffb-a141-7c8f2dd99945.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 0xa8276570ead4ddbfc1886972b0617f08556f90d768543b672f4206c1da16ad8b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLLT2336689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475cac43396ca7a4b896ec05a0731385b35e14d714cdaeed8ec31dc6ed140a3. 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/GBLLT2343809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c66e95a2ff271ea46c9ca51aa7c0a473ca1bd8884bb163c5259784e1330ce3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLLT2347223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f2251fad4a3efd2245f5d40a37b73738c51721dd0d18f00c8b976c0a12f776. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBLLT2351285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b095561d950b202c1b31fbf5af69fabd0e74b0c01170720ed5015cf1982fa5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:06Z), 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/GBLLT2355488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ffbae697a489e01f09ff3a36994e8337edff19fafc03c624a5b3504e180a2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:28:02Z), 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/GBLLT2403875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7f1adc76746db4cd253bdc530b678e3d4475f2c6ab04aa10933e80b7a39d24. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLLT2407275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19f06541eecfb5734d450b5a8cf452caca0aa1860b179bab12bee9024300ab. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLLT2412502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df37ab949304b25a2cd6036c56c5af1165a654838c6c1edd20c0f4ba922b063. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:20Z), 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/GBLLT2412927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd976d009a405a9c470fa3561b2696b0567924dfcf1522762248715980b61ddba. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:07:02Z), 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/GBLLT2425306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478fdfab2bf960c52693806a6c8014ac7456d48c0b7edb205371dca91b970f76. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBLLT2435309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda52ad24bac8f6250eeba336432a56179842ceadbd935161c0b800b40ed08f5a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBLLT2437968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdabd6c62695b6a5fb98f194c64de760185580bf6c6a42de5ede23f2b8679a3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBLLT2438948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4750f81eac10f70a7a76222d6dd8f303588596e09a4988cdb0297b3d489dba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLLT2440822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81954e712a8ca734c4f80dd4893410ad35347522ed14a4ebff617efb35aa54. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ7X2456435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefcb8901d1a112096d7a8e85c5c295b2504b6c7c29562cec5c05411e8ffdc30. 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/QZFYZ2531216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7adca8d9af717123428ef510f8ad066dc428efe75c1ee7e900939ffbedd9aeb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ32591726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a775ff5af5c121b01d7fbe5b391460d2228e4a7d43bad9e2fe6540d7d1ba2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ72572846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12aa3bd0b3402885d99d4c361516ac4d361a868b343fe662a9b4f2223129ad9. 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/QZDA82540778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04d1a7893f6d56043c005de6e7d837a80c55bf718e98c96538fd653f898dff5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZES92565553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac8886b08c32809fafb5e82cea94bae96562fc45b2114d0b3c379f2e5849eef. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN62555168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ae47fc81374220aadae3f45043d31daa6b3b788f0317d0f58b1faabfb1d6f. 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/QZPLS2583438.