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 0x3de06750b162d6f7bfd14ac7144b11ff1889bd9713fd3fd8e7294f063a5ea0e2. 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/79165220-ee44-4533-b1fb-71480acaa2cb.json and https://artists.proofprofile.net/proofs/artist/79165220-ee44-4533-b1fb-71480acaa2cb.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 0xdeeff9c20204a3e5a7eb444d2d9ae1ce355acfb5dbb3ca50907df33dae16aeb3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZCE61830968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ed7c0f85940e09dc4b31fcdfd39eedb0d68c52fed0292af452c9d1b60b59a3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHN82025824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8b13f54f547e54c6936d410b593c22d8c2d2019b160699005ba7370f31c481. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US25X2005952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f16c3402c19c9e16b7ab26364650a03146f5f0307bdd597207b88f5c160694. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US25X2005961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184baf76ea897d219b310d0f5b1d46ee0db66fef656c013ff34ebc2b440a9fec. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US25X2204244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9cd153795c21eea9227d18c2d76ef2d32c8ff280faca0bfab54a2a14d0a69a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/US25X2204246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf14707f7e8647ecae0341abe3b8ee58e157112deadaa90f446e2c7b34a65460. 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/US25X2204247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bb68bbfd7208c804eb193b9f411219d07a658af6d0efa7c5b46083aeab47df. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US25X2204248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35395b7d69bc762a50f0d089cc83e1cca266a900eddd5bb05ee5632155614b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US25X2204249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3268b72e3b0c39093a63477465b277c30efd94762221d077f84608d9932d1592. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US25X2204251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aff16d7e7012aeb1420a0d9b3c0d018373547df66a2823eb4121f29a2a5bc9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US25X2204254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0f71440441781125222cc3f3819dcaabd2acb1fcbb9e6d03c60ff5cde4cac. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/US25X2204255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8627d2ec9348650678e45190b88bbe58697a15876ca30f58843d06811243e. 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/QZS7J2318387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67dce3f693e6d9dd2229300e17be40b7871372f96e008418c15dc86ec4ead0e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZS7J2318183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295d0c4e1a8d5e7fe2248fd72e89580ee029fb46930f562805919fa8811cd6a4. 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/QZES62480933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f30fb0e7a25e5536c27dfb294ca512a68a6d1ecf3165c32a670e6d74033a02. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFX2400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140de52f684c790365cadb5db1dcad8b0ffb282e5d02e53b61e4db3c1cd3c076. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZWFX2400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfbcfb1c577c366365d5416b4b55878850711ad777ee940acda490f68cc77bb. 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/QZWFX2400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4a8a16f0a0ffedcc493af0636bc5a3f0a7b17bc0662f0acd1e4d767ca6347e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFQ2441141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b8dc031d8d8b8dcf1ebfdc75c722f24b6fd32585b9bde89fb1812a15899bda. 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/QZWFU2457072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68ce43b49867e75fcf8d15c179d3a2f34d82981e24c125766ba311efa2a53b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US2S72505007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c01096f7101cf8fee91a819a0488b4a576b27b8c38dfd713a9a432628378a4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA42261052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e18cc0a738b275ab4ba8700e4b90e61281a408f92066866bbe69c5f09869a5. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/US2S72505004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53924f694939d31aa76e19f19529951e79a17a18378182641f5e67b60221c7a1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US2S72505005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b317ce825bf577164f43b1f2ae1e8e096ea2c5dbf45b8309f08c74fa83f5d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US2S72505006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f27be5fdf9882c3a5d80b23b75b25bacc063dc77d4a285c2260a0d0df0a09c. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US2S72505008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312398620f736d5a7775a05a6c0f98d8277d97de0d0412c8cea3f212e6de943e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US2S72505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b319d7d1046110f3d508476c9abaad0c045c869224a795b7838999d1e45b9e7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/US2S72505011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6808181f2cea70db858fbec816ed703e862dda52322c2bcc87e5164090b411. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US2S72505012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8123f587143e161841fc4fce728302eb139c6d564b13c6a5eb102797eed5794. 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/QZLBC2424343.