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 0x9a1b49dded29fd8e575e6f3748f134b23d64ade6f82a577d9cda92e643a9c4b3. 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/30bcc8fb-c8bc-4cbc-bcca-b53660f23228.json and https://artists.proofprofile.net/proofs/artist/30bcc8fb-c8bc-4cbc-bcca-b53660f23228.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 0xf299b28bd0222a3e213ffff7e1aacf4b8afd31378882cd72d6cebff0cbb58e25. 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/FRIDO2411736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f0a51550d2107bdd4dd0a3808a33ef573d86df61f510dba586786f15e259c. 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/FRIDO2113176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c52942f6b6b1223966886b3c9c0fed2476ed33b4f05a6cb89f6f5291e9f5f10. 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/DELV42101283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc468e25af4b75b9ce5773cfab3e8861a5456f327fd6bb3cfe33602f81188c55. 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/FRIDO2210347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caa10c1e994728003b7571ee129978e9cd022a1a3ab3c7803343e53d0a6a09c. 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/FRIDO2112108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf72148dc54b0ce2f5ec699079ee314310f20b9435a49bbb40e3db4ebe7ad2. 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/QM6N22091914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f4ca6653b614ba9d0a91d1ef923ed1d6e7e5afebe2f8f1ed83fbe389528cd. 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/GBUM72108929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc0e5a721da6a93b963e34655bb3dc9a3aa3f4cff38eb06a465dd723ddf3db. 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/GBBBC2100762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105a57515ce7d4b78cd038e42916d79dd79147a964b803536df6c9dfdb8ff853. 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/GBWMY2050160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee2a3dd5ced5a39664e24e00bb9e3b9b757e1e1b352761aed5507dbca51d688. 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/GBWMY2050240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0cdc9fc10ae8908663aebf521bccff07566e21d7f65f30d2ef83a14e5b80fc. 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/GBWMY2050250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adabebaf9a64d38e402365d25f3b342aac2c0c8ade31fa6c5ed276d87bc3373. 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/GBWMY2050260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795eedb4f86f519b2a1233f1cb5a2a1a209f847151683bdff35e67d63f79308d. 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/GBWMY2050280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b2659ca9e6e80600115b677ea26b554ee7f24aa46bf4b52e71733a71e7bd51. 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/GBWMY2050310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15069b8fdaf6fd8ac48d356c10259f661c8180c56a02118459924af852f36838. 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/US83Z2126486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc26b3b61bae8571a63e1eddc54efdb44dda44a7fdbc6c8ea2bdc84864b52de7. 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/CAN112500258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009241cf322785f7abe7c005e392f20e7d6f5b597bf1d6de0cb6c47683ecec1c. 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/CAN112500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b0cbc4610f808d43f0514364ad96c4867666b61bcbc0e88c69b1c3ed4f4294. 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/CAN112500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd75f20bccd6b30ed781e7cbc65441d0f29ca0fe4b4a3888561dfd8d740e145. 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/CAN112500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c6bc18669948f74832a7aed7639712fd3366616503ac4454b6285d51e5b653. 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/CAN112500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ade06edded220d18d9f3766170384da6632bf956d2aff887d787b51ff1cd0b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CAN112500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c06b78095f2dfafba1a6c96a8af99391b91901d9f9fa482a4aa14547d9959. 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/CAN112500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c29b72fddb95f37977a5f94b76e881c0e7a7d60649d64c7ec878b953fa916c1. 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/CAN112500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cafbadf1cfd00b5d41fc5e52da90c2abc485c53913a0649a7ed130c2e8a788d. 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/CAN112500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1120134750b72fad47da29a18fb23e935ce62e42119400ca0cdbdd320be37f4. 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/CAN112500269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af62cd7985431b57d483724ea788d203e55a4e3ff140d8e9bf7fdad99b4407d. 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/CAN112500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb6725c00ec31ef0f6dc8d5beac18c0c4e1c6656cf416c92f9c8271bfd8f783. 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/CAN112500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dd411e9a42291354ccf612b5e51d0f139d58906ab14611e2918075ce484987. 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/CAN112500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd752ed5dd30d10abc4d0d7aad5b17904ed143812e753037aa4d962bc79948. 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/CAN112500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b658213763d441becd892a28c02d74bb4502bf431a56ec3875f9f975c7b106. 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/CAN112500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fcc5885568c768333e00b88daaa6b38b790cb82a8e84dc857afea1d942ddf1. 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/QM6N22138130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6460ad639cfe663785a75f056eb9ea4dfa3f3bcbee76398c636565e75e944. 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/US83Z2127770.