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 0xecf32c3bafaa17b1f9d8e967a3549f37a1d31bf866d55d13a7e560d430d32165. 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/40c6c1ef-d01b-4402-a444-e8afa57f05fd.json and https://artists.proofprofile.net/proofs/artist/40c6c1ef-d01b-4402-a444-e8afa57f05fd.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 0x37bd5828b268ff105fbb881678177484a28c428729d3b34817c7e7ab1fc0434c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TR0801601775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8be69d6aae07938f982f35adac76325ea1aa6bd6d86e485822dfc84446c86. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TR0801601777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6453176b41596b9ae42a9b0aec761b510104ac136de28d15b56485b2d13cab4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TR0801601786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff65b64a7c7b9b337870718b2852b237c828854b6cdfb53b464a453a76202d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0801601782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd420ae0c55a9f8ad0793453c497beca3c82b7ba94119af3146e299e4505d7e8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0801601783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81721044cc6ee0fb01554357d8ccb551e16bc48ee879da97913b4ececd07ac8e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0801601780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f73bc5a842b851e467524e3e7ce036ff0aaa2b7da09643d7ab4e506c6721d0d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TR0801601776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddb0b9a73677d25f6ffa7747a9a54e4cddabd8720167f62393ec36d58be6165. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TR0801601785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ef994cebeab4896af2a1dc20c5882e45c92b71dbcd573766c61c593304b9c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TR0801601778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82336e2ffacfefa81547675f00327a8dd38abc69a881fe60958838f0f17cfb04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TR0801601787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273d6a781d3b1d66c10f397f4f3ab450107db4ad55f8928629a569b8dd8cd908. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TR0801601788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde98df6eab24eb7619e61cb5e9eecdf6aaf335feeacf774ebb2cf21a78bb41c9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEKM61404921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0b76fb40a6efd5c89ffcf38a12c9c4e0e57fb7a2434bdeced0a6c0e18b29d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEKM61404922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b1ddad5f031dd15d8a7201fa4e6607e627893c7052732eb99f371a509bcf0b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEKM61404924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06176a9267ea66b5ec67b02ec254aa952f544076278d2fdc153c8b2f532d86d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKM61404926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f94a4273a4ff2c97bd5f0bdb57be5b7243eaf5c5fe2e635eb926ac970e1bd65. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKM61404929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748d5478765ae2b5a6583cc61ae068424efa0373116c8f5da95bf955ca28d964. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKM61404930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcecc3b2bf5b8fa82a25a120114629f06386616a6dd36c11b8d4163aba4dbf2. 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/DEKM61304009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c91de8203207e9d4db1c2acec5c84b47f4e39a46a719db0fafe7c7e42e8dee. 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/DEKM61304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2806f86f8fbddd1707d5182757663bff998a0ce9dd85d59aa33160ff6fb320d. 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/DEKM61304011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962e7adb07075f84fbdb01cfbcedcd3d1203ae7a6839a00a81e65a483ed9667a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEKM61304012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d0f9f0aec7f97cacea8a7f799df931a1a011943beb13a0da0e58089bf5654e. 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/DEKM61304013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8628c00a2a6c6e6c3a6cccc77297aa75cca97412ff112a402aa8fb840601e80f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEKM61304014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b116ecfc66af6957a8bfc6f723f121d3e3e2361d226043c821e66af41752ee. 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/DEKM61304015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088b5641a5523e45b9ad4ef90a6b9b6efdb7a7e83c1a35b07fc00ed236ab715. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEKM61304016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d34cf20fc291966681ecd9fa97a19e15def391112b37c96fb3b4460fe6c2402. 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/DEKM61304017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d9c8dcdd6545f8b79bb15233123eba3eceb68a4115b68c2aaca4b196c2c5b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEKM61304018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f060da17234aa1546ac658f16c69e014287bbd132288708123db52ee531538. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEKM61304019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54b8713485aa0fd2a3bc616e7ce47d3def85381586d1640b1bbd0d5def7f25. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKM61303912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb86a4f50136db0ea310e58a596e7242e1e26e65f3fab083dd0cc26e719a02a7. 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/DEF069508920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82adbc03e9e1a56315169584e918c02dfdc4a52b614dfd0f50a503f4ee045b4. 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/DEF069512960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707e63af1d7e36b2ce211a991c51e3e70b08764fc8b63e23fe7b8d163f733f5f. 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/DEF069512970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567c692e929db0dbb595bdaa4ffde9a16a1ea317d86c65e187311b153162b009. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEF069512980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6ad8c5c88706c49d2dabb108a750f0ba7e0e8489f53bdf1520c6f1185e4b08. 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/DEF069512990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97729ad4c26a1198b37a6b1ff9514deed9fed7c0e41d8eb037cca36381628994. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF069513000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fece862f1be62b0e1eaadc623c525e5ea38e06ce5b3256272fdee943394238e. 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/DEF069513010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6860d08d2838cd04ed51858657e415eead3955da022eb671bc22b2e0ed32b92b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEF069513020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310e13976ed0ebef9895885f09d08d571d62f03bf7ffa1cbbc34aba362f49eda. 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/DEF069508940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62927735259be1c32479a15fb666f23fe3b9ae622d05ffe7403e4d7e18249fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF069513030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9742134b63d18b0d0867314ac8261be42511b3ab1ac13cc8c47c70e95ae5a6f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEF069508930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fb39261e81999cf147bee7bc5b22293a860dae70798238c9aa6c24db9f769a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEF069609310.