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 0xb777c06279e6f1a090807a5acf5c17e28aca6c41917a37497d7d93fa266781f9. 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/e5cf8a15-8103-496d-8702-42902842dfcc.json and https://artists.proofprofile.net/proofs/artist/e5cf8a15-8103-496d-8702-42902842dfcc.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 0x0b6fcf49e2ee163fa6377a2d08269b31a450fbace1ed631fe7a1d46124737db0. 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/KRA252100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea56074a259328131b318b06258b174522dfaf19392eac3b679c2ad390fa3ad. 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/KRA252100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faef9a1ec306d8a2a00dceb1a95648f6fcebc8758e0afd2748a4aa07cea1407. 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/KRA252100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25352ef01fbece18f5b7144f98e5fc80e70f54ea2f05441d851a221984c27f5f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/KRA252100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4940a2116b44ad0e6fee7f7807ec1826adedc8da971606557d069006287c3c05. 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/KRA252100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54953f303d12a8a00916e8528aae811edeb00299cd6385e847ba1912b06646fa. 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/KRA252100407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc000531a9b30a7e8b3512fb2242adecbb060cd8ceaf6d9f3c98efd55008c0b42. 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/KRA252100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c65e85c60283b9976b8c4286030ed28f7d7766f155a77626c9e2e0b9b1dec3. 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/KRA252100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f18066a5a6f42b517c2dec145c6d3b2d85257b3569f44b9ea7cdc233e670d0. 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/KRNAR2351293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb68d1d5698513401d6386c20e9ecc488b95ee6a8d382641621f89099d9d2db9. 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/KRNAR2351294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0b95801866e91a99f8760e422e9913b9c3ea37366c557b8ff5d019fdd6cb17. 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/KRNAR2351295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02271b2639e638b5ad595d2a1158acab892ecb31341a82a2a0287f4145c8fe5. 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/KRNAR2351296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b71ce64ae1d2dcdc1b29523fc22e3686897b07baa5841f400e8f28f64e663. 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/KRNAR2351297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedceaeed1ebc52904850ce6c9305d8b4cdb18785eb584fdffaae49762141739c. 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/KRNAR2351298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709831e67b26babf515678728d3f040d7f754fbb56d77b23b52fb0e9bc245555. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRMIM2032075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32649c9a4bfd89c3f875cd4c70894b1e91149522aca3fdbe4e6c6dddc513091. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/KRMIM2024367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d65bb4da458090087c97f272acf18c699c115b97fcc5a1a9331328f3c0b7a. 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/KRA252000754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3be742cbeede4cf281fa6ef342222bbcee6c1c05c6f7abaaf43fddc2cc9a6e. 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/KRA252000755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53022ec177c25d99cf28812027cc3be8550920a2709272a7500ab99b01eb7c3c. 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/KRMIM2006544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd5bcd4df520ed2da5ca320a77091168a2b7c5dbe63ae74d0dd0caf904ea61. 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/KRMIM2006545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d10372463ffde9dafdb8a2948658d1ef6a4931aa44cf592910e1ac20ea6eb23. 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/KRMIM2006546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09355c702fb8e95eecfc26c5659f12c52b9b6592911acb37d8bc4c86a3c0f478. 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/KRMIM2006547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc627f205b6bc212507c2ee21a61e6014090cbf590537b581225575239ecf8c4. 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/KRMIM2006548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1642c6d0fe8276184552f7f26642f7ee21b2da2d02544bed85432177e3747919. 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/KRMIM2006549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204dda9a7b0cffb4e3d9cf0aa8cbbfbe17fed77cf09e3a0fab31e5469f283f75. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZEKE1878184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a89096c8281bc9231d6ab38a114d9016062e5f5fc3be91af724ee3a5fa40647. 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/QZEKE1878185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd233deef52699b65bbbe98ced4a58930a39da3be322a124988cddcaa7bdd0a8c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZEKE1878186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5b492be5203571aa0a4bc773ced0e75cbaedbcaa699b513b52f48cff906bc. 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/QZEKE1878187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe305ce422cee03d06fc72f33eaa9b696134eb483699a5a7ab97e3684d4caa419. 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/QZEKE1878188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9eb47843415908fd4eace90bc6bd6ed39587be20c9035192e978ad0b48bbc4. 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/QZEKE1878189.