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 0x295b4fd76d3038e7aa8efef86f34f1819e3ee52e9f1c1e75bbc1453f1354fafa. 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/b689e4b9-1fcc-4031-bd23-aeb967ab4595.json and https://artists.proofprofile.net/proofs/artist/b689e4b9-1fcc-4031-bd23-aeb967ab4595.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 0xcf00433f65874d53572a75a1a190bcbba9c59eb0823e5ffc939cbac4ed04b11b. 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/DEPI82439762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f8b103ee16a9b4a215a7dbbc2becac2289e246dba24833fb8c71f58b813e8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEPI82423039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350af83b0175327f4d6434aa5332d8f52a2aa0ff79995fcbdf52b7898324d01. 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/DEPI82430911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dadd9e8509bb08511bba96f766579178da8151ca3757d8935f8f8b4ff9d3f2e. 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/DEPI82439763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f119f2c8c02818c6ecca2a630366517c522336b9c839fe348df624d582aac95. 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/DEPI82439764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b05a2a26e029f95423c2d5b140a3bfc694bd3ece5093bfe4820e95c878b56dc. 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/DEPI82439765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a3c44d48a58d1d3f2619a565de070d77c534cb7670d1d0e1cd11c08e50c2bb. 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/DEPI82439766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b4aaaf7e84e44a63e17d0fe580eef6cec0a3af4d111e29e1e8b8bf00c3c5e0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82439767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fdd4f118e9275b88d1bc8021fbbe35353ab14834369f226bc6b7d099bbaffd. 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/DEPI82439768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f4806b8198e6efbcf3ed2b86e0e1fb6d88ef603ebeaf98532ff8ebaafecd11. 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/DEPI82418761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02894918949f2c3ede3a32dacd8ebabc0a6c73e51392bac843dfeb65abe3a841. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEPI82439769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23899de4e73c1ea7d8429eb32711075a3d5399a0aca3cd24266fa701d641c238. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEPI82439770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd919dbd09fa0fe471444657df6c5ea7843059490cbbb2df68f77407012666c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEPI82439771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8310f7b86d6083e2c4068792cb781779fcec2625bdf293a1035a46a7210566bb. 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/DEPI82439772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc75e4c20ecb73b76c17c97c4e7c77309188fe0b6a22f002bdb0849a8e8327. 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/DEPI82436253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55848f07e3a0d7c262285646161804c92c861e1dc9f1d055fa96d4e58e7ebd6. 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/DEPI82439773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807636365bf0d9eaf86c94a265c3613232b768cb842e88a5392a560dd94170d6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEPI82436694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7756e5227be7ed5d56bd683e7a90f541490f7358afeedea00a905e1bb2ebf695. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEPI82433099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22e7a7778a7e67af3537b631fba890ed74e0bc340ec793f39c97805d5c0cc51. 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/QZMEN2498376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38bfbca4ac47128a83401c11ba4211ec7be5e069ba54ae61fdad0445ef54f49. 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/QZHN82330722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecec757ebf50aebda32ee02fc7d96909737c4336a12bfabde19102574de4a74. 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/DEPI82436762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f1ef92fe9f1f975f618c91b7b66614f4ba74be1f3a11e58947ceb2be6ac6a1. 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/DEPI82431083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350af83b0175327f4d6434aa5332d8f52a2aa0ff79995fcbdf52b7898324d01. 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/DEPI82430911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7069d0783a18f313e7e58178449adc0a54464f7518c5e8156c92914d541a9a. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZS672251031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691136228da29e1d5587bd024ee797dd8da68b6c496a17f0dfd28310f2250b2b. 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/QZMHN2206086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334dce087a66d57fa7b3cd8143bb87a9d6ab8977ce1bfa47f3a3e32bdb5a826a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZMHL2294830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd6d164d60ab1afd16713401478b9bcfcb6dbc4cd43f4ae348596a357fe2e4c. 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/QZS672240723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648861b214ad05135d986cbc4ca16a60c66ba3cb3b7e3babad240b537595828. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZS642219390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f4a06e1d4586056c6a12ae10e04bed914b70af0bacce8bd295f284aa652bc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMHM2248258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5877b13b9a35aa3b1dc023775b2a7e3a1e153f90d8aa1043198c1f890b540d1f. 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/QZS632252887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd125afc6893354a80e3edc8f680f043000341a28e8cb3300a28bdb2b402cd2. 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/QZMHN2202326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aca35c12b906d45f63544ed84d1220faf3e1a1382b4f64fbc82c822fe33e1f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZS672252605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eed3be50f6afccbabfa300996c33cff15ed1365baf7ccb500d95a54d2e195e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZS642267530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38844ed1221a1729dd20302f0393566412e558de291b458391f14f2c39c84d89. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZS672237120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cfe5d9853b8ae76b5e0cdecf4ead42ea30c1d59c75d76046250cbe3e0e8232. 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/QZMHK2235847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d57bbdbb50608e937e9c06fbb259953e9c486125c68cfdb91ef6e5f6cdaf69. 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/QZS632288615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb0260fda695436f7eaa03954f36e4912c7fc54940ff47c993f2c562623eecb. 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/QZKDK2208275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a70b2f66913e8220c698c229608eb74e53fb0baec65c9080311d1ee39881da. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZS652250297.