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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dad92abda0627dad039b90ab8d909db2a471301c73131e48f2437e1f415606. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7b917db-611b-4030-9147-c0d29e849278.json and https://artists.proofprofile.net/proofs/artist/d7b917db-611b-4030-9147-c0d29e849278.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd001c3a40f41eae425ad480047d1934dacc0896e3873281c332fcabfa038af. 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/SE6TI2186864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147f18c6f16b590d43a0e3cc86a35085efbbee966e694848be5a2adc3de660ae. 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/SE6TI2186865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e654a26c759c9c88ac9794f9c1fa4e2406f1f5940ae04f2e04eae0c5bec61a2. 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/SE6TI2186866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee5f747f966b3488f750fed40036f29fa83ce0ed5d4632f5948771c17cda7a0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SE6TI2186863.
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 0x28849becdcac2f58bbf2af48d4ed81db668e930254ac85be8d80e1fbc1174f04. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE6TI2186867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1a173c5adf1e4379455fdd66094a666f82dc833f03a9e830a21faf47c6c7e6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6XX2153429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc007db16c116d65a6e364408b64a9b76c9e981f7a01a2c26edda90f614b776b5. 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/SE6XX2153430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629b01968a905589f5382cfbefda9c71baade4b8505f9c11e853d3169d52e251. 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/SE6XX2153431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cb7a8af74e09e1ce08b012690ef4e49244e8f33d5442076a5a796eeb005045. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XX2153433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac894381950974cddeff7967ed46ce9dcf7f180655ca5e3955ad50ae7b829995. 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/SE6XX2153434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e7527986139da5c0f9717b4acce85e6c24563869b8473d2ce2390a1f4e5e89. 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/SE6XX2153435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9ae05e06c881a9aab7e7f5dd15e775fee0b3f2a76451b026a6ddd044d3673. 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/SE6XX2153436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4d93753c65e37426c6f819140b7eac941fd4aea3375c1382defcb46a70034b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE6XX2153427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276a7dee01888692f7a9f189c91022b69f6056e511b5f086bd73b31840c0d24. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE6XX2153428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ab2447e8f5d73d4b4b736ea934ad35ca01dc12b3b3b6f9ac266cd440e65e7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6XX2153432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15ed01790a87d25990f3ce0dd3b5288dd6aa355439b4939fa5a8031fee38f3e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE6XX2153437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae43d8cb9ec87aa6ca8577fbc82d93759074c12a16ed40fce92ef456aa7b1f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5BU2255451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f4a88cc6768f9d2c46249e357f76c8c6e1801536c62b2f594e0ec724e071d4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5BU2255456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ef1de8d046a4ec7e84f7ddede432d3b81dfa536845fac4dbc3198bfb74d9ca. 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/SE5BU2255458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709921ae05fff2d8b2de7c6ed18efc1eaeb5314acf13ea59c591a7680cfca193. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SE5BU2255450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22748dc9fbc7dd9b778c0fb2b7cd4f54c680b41de858b366671daf5ff594fd4. 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/SE5BU2255453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17decd621a0001c3681b18db95af136fd03e14ca0e64db3240cc54720fa9dc21. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BU2255454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930ca181d48d2752b1b880e4694fce8b1834f0816183251c5e4ab3f3cdf9250c. 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/SE5BU2255455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f9064fe342610128f34f7ceba0ed4a72c8c1105c6f5d9d8c8d417d04ba910. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BU2255457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcd30abcc982b0a4c6720e3f1bb96a6f730a66da417ff314fe304a29d8ffae3. 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/SE5BU2255459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062d5edaf020fb78eeed5f24ea2cc2f8d1ab4fd6b0c2116ab7413717c31fbe7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5BU2255460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1794c0e74a5b438e34012b84056150b1a6713453d7ea55a67691c5378e6b1e. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-21T17:36:45Z), 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/SE6XX2118034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271bf7002a6ce8b198178b932687245617982f7dd4d72d1ac17dd8573f28901c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XX2118035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7b8dd58a89743289d12d4e6f0a38897727f96e06d7bb1ec9bc94617c1c6da8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XX2118038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da81cc705355db6b68e8600802712d69af13849c1be4c8cc16a796b02e27da. 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/SE6XX2118041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b4125b76f616bca2bdf979f5201939db6f346735d5852f532d2656c13bde7. 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/SE6XX2118031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70662e24bd4061c1bd7ed483dc31cb47b9a7dbcfe634715df0f8b556d417c317. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE6XX2118032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7ae29d1da5072c97a43decd6a1f16640f48d138784c62f08fe82ab308fcf8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE6XX2118033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15515737faab3030d92472a2e1573eb4a1deadf83dd98b389368872b44c7d73f. 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/SE6XX2118036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ad7205c137dd1dcec09fe54024c753711e82fba6d3d5947aaa7dc88e7fce0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE6XX2118037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d983c34cc3fc2811d15737970697f43643670550d656f7ccf5f5d1f03cab7. 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/SE6XX2118039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550d4e54be52c069a77f2435754861b08e2e4fcf997c434fa2a52f5d29b39c0c. 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/SE6XX2118040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13627e660e92b637b2918c1aad2e393560c8020f1f787c777c5663bb42c47bef. 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/SE62M2339438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4590951c00435a29137c5f8d874cd6bddf0950723b2ea089459e8662f0b476c. 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/SE66N2317665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f8e849b2805b3f2f7adbefa83b4874923ad71a5fa65864dc8e7491196696a9. 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/SE62M2323089.