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 0xd48aff45a3578188addc4d8c54eba568c9479401dc8211a98f0c2d90245630f1. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc45406b-ffe5-41a3-a6c9-ed0dab8786c6.json and https://artists.proofprofile.net/proofs/artist/dc45406b-ffe5-41a3-a6c9-ed0dab8786c6.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 0x187892d824b4756978224e06953cefc6df218fc3ec7b73bb3749f39e126aaee1. 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/USANG2008185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1be0c11a6bff604c8273178d5c0a6da33c8fb963fdcc8cdc31405912e1c9ab0. 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/USANG2008186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc795aaa958edf325cf84ad80faaf2250684c18efc4311947b0356488afd2494. 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/USANG2008187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957c848920c6293892f35906482a1fb89d7aaa1862f9fe2a40d5d07ce36b4a0f. 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/USANG2008188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1944e47b0b7c6bd6c9dc914ba315de53ffb05b1ce989a62b953c1d94e6a40784. 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/USANG2008189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05bb6ff24f407a1cfd8b4c6a0de2f9005c7f358ef6a22fad8017e10d114c23b. 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/USANG2008196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66f1c369c200385b80734051c9a7bb555ebb4ee5616c5c899a9763ae326acf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USANG2008172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e677eb848eee9d42011ec74a18ba115f81eca99460577ce3c4bb7fbcb93251a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USANG2008173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbe99945d4620b1622803c9f896c052e7c53ba57d51913f0cde4a4da6b7204b. 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/USANG2008174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0946dfce7ff18cac1a4fe901fff9cf37ab2301e231a5ede37e81f4eb577f8b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USANG2008175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8c5a044751f6f1bf423ebf7075aa22cef8131ea7f84cad0ddb9a0723671e9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2008176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3aa2fef46b16138743d6d0fdacef4deb2b16da72cd5a88d38dfe4849822ddb. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USANG2008177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7729ccaf4b1e8f170e5a7903edeabaaa96f23e1c08bde2472e3770818f93995e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USANG2008178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9b196267b03f1be61a6b75eca4599e94dfd57fcd907db5c0f3c22bed6a7100. 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/USANG2008179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6526de9cfdaacf8ca882f2970cd81f3b3b882001e2b30163063cc857b010f410. 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/USANG2008180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee01fe72c52c61fd042a689c5f56351847718c7aab36881d5bb1111aa4cdc5c2. 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/USANG2008181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268cf77ce30e3280f9f4d2fea7674c5d266036953c41a084b5dd5b844f976bcf. 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/USANG2008182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7aead43608adfa30e116bad7ed4a9779d61ea6af85bc6a0478475d86ac78a. 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/USANG2008183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba92e41103f5ee60648f837ab12026a1a4b7c1d9371683a7472ba7018d63695. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USANG2008147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099c1ea96ca9cdf449853aabe08836d5e60a8c1ec62b8be0857bc5af8ddc67d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USANG2008148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260aa0a7a4bb835cd43080193359020f9e0d44a6d137a71e2e984b3d3d059af. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USANG2008149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d210fe31d3b7f86a7a776d879bd1b4d7da4b398b2bee916c04d92bf09e960. 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/USANG2008150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292b07d9869e57f1f192072b943031a5b6233bc2567979f369d90cbd6eefbdc3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USANG2008151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaacac147fc388045baa92104efa10c4cdd1c43ea993c663a1de3a91b99369c. 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/USANG2008152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e12276bfb34793e738d5c5fd389b29834d1d133beabbb729c383c49abed79e. 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/USANG2008153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6014cf9fadd44f5d4a2e67c469430f350bc671ab0937adcb6f54703f3d9b3c0. 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/USANG2008155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1287df679c1f65a4dbcd3decb8116ab907a98e12fe3b97f740afb94c5fba400. 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/USANG2008156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b1782c939e5cb9efe9d704d90b870b3b9d46a03c151b6d90b07a50785e17f9. 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/USANG2008157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a81bb7c408d5c588241797c0d36cd9cf9928d58d62bb3deadc18bdc1b8630b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USANG2008158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8564ee63960c69367a0d57e10b2d2e9cca9c01ec796a66df08fe08b48e31782. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USANG2008159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1537972431418fa9f4f29af7624c3359a76aa8110cf49542b243f2c8ea473fe8. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USANG2030716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b774efd92884d766b11e911ea80f9f8b988c0b89bc58233895a2676c48c5fae. 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/USANG2030719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c1b563efc0a271d198e796ae68729e02e4ea43ca6567b45d13650532ece7d. 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/USANG2030723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a867277374a2e1dccb973cc9a6f6b7c5f6f0e6e5b7d60f71066037a8aa1b0fd. 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/USANG2030732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a20e0790c3da9977ecd3786859d33baf7c8f661cc66812db5f9973872400a. 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/USANG2030736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948d21edbf7472a17043e5f0e6e84fd397ffa5da12515a29866a24a50d27157. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USANG2030741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bcb2cdf279e2d32bdfcfa9e47251162c0da6aad9fa56706b13eabada9be4dc. 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/USANG2030742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d9290a67bb6ce9b23919a365a1d3f48a54762bcc452aa63845d088766ee646. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USANG2030744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4fadb95b0f36fa053d899f1dbc77ce269127fb42db33a5629322541f5cdb53. 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/USANG2030745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ccfcf18077fa19b910a42c5043e37a74e35027eedee6641a3aff7e7a404b91. 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/USANG2030746.