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 0x44e68c1c82ba9fdf3798bc550a88775271538d63acfaa6025acf755c33897cbd. 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/50d2a92b-6cf5-4521-a2fe-cd06f92aa506.json and https://artists.proofprofile.net/proofs/artist/50d2a92b-6cf5-4521-a2fe-cd06f92aa506.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 0xf4e0d5c8e6a801cc43075d60c0101f73d1bbd5fee6c0ba447cfc0e6d98c19560. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCEM2259010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8633323124f54d374ac486509cd88dc4ba501c551bdef2c9220a98325a0a347c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCEM2021010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76fadad72686afa4fc42f193d43f95eb4350c8199208f16eb7c9291f3082333. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOCEM2204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e0e457f86f7dc7f0b97e0aa2656e1114c96696594e706ba7a009b7fb161f17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCEM2122010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ade5e765273a44b6c4612ce548e68383b699b31d6732dc9c4781604b383beb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOCEM2202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26264336dda5f8b8856b35dcf9058bf5c76df01b4bb4ac39143255895dfa377c. 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/NOCEM2259070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f51bccf3815a20d536400af6df096144c11e19673d64fac4424057cd0a512b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOCEM2259080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff277feae569dbb01ba0d13431504605b896f68f896055ab71cebb3b5f63f64. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCEM2259090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4750e6d8d39e284646dcb9b4ce6e177cf7d6030e2a8681a359455ba0625a97. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOCEM2259100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe024ea325d76ce305b822f882fc2098cae3d1fe1797319130611293fdcc9726c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOU4P1802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a8840d83a11396ed831c292b007f7c2a6bb372335186f831a37e6bf4e5f0b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a3137488e775584538b5bc4c4492e50ef5ce42ea30cdf35395bb4aa63bf1fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOU4P1802030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4574563d5bbc56f31e51d057bee88fb2a61612d7bc228d47f5be8ee1cc0737b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1802040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb936c9a9e0164081964722c15740a02c62b474ff9ac99a799d7f7d0bc08cfba6. 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/NOU4P1802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacffdeaa73ddbe2958e08d4cde701f1a3048234cd3b44eeeba3721b805edcc2. 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/NOU4P1802060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7165bea022fd9d30c206c489628a1988e6fa3b2313a9366c823b9eaf1240396e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOU4P1802070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ce2aac3e3ad7f8df2b40b32ce11806c1bef1ec8a37bbd8b2af436ee443332a. 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/NOU4P1802080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd3b210c0fdfed2c16168705d0370d32c7b4b6ae3473d310d4ed88db0870e3a. 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/NOU4P1802090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3473184c92443abb08c22ad67a77abfda0041be01353712838b7700862131cda. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1802100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e468f0e4a4a55a50380bed527f9f72306744fcb7151fb2fb98f05737d174ca3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOCEM2328010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa50b0ab6b9ee41e828ffaccb5faa7ab944ec3fd171f66904d9ce368dc5db5. 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/NOCEM2323010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54d0efe275e23aa8a732bb78703515e50549885547b2cbf437035f4c379c52. 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/NOCEM2315010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe22674298398caa8e66a4f7ed3c85114798ff437dbc7d13e41bf6d3707dda. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCEM2307010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76fadad72686afa4fc42f193d43f95eb4350c8199208f16eb7c9291f3082333. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOCEM2204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ade5e765273a44b6c4612ce548e68383b699b31d6732dc9c4781604b383beb. 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/NOCEM2202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e0e457f86f7dc7f0b97e0aa2656e1114c96696594e706ba7a009b7fb161f17. 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/NOCEM2122010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8633323124f54d374ac486509cd88dc4ba501c551bdef2c9220a98325a0a347c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCEM2021010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6542b46d3673865764ae57fdc7370b0d14900bdb1bb67530e84f787d292129. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1904010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38597d087102a0bc5d4a391f9145b4e7079d6ffa2a0f9198685f9d5a79c4a4fc. 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/NOU4P1903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e77142b7c7cf882614c2d84f090f20c03575dd109cd655f6a21b9df06145a8. 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/NOU4P1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a308e14374ce1a8fed7127793f146e21e22c220f9f19c9550e2a55e8cd754. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624e9aee257dc7f0a204a67b675d8753c9ddba036fedb60f563defaa6016cf52. 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/NOU4P1803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e49f247cd04468dece31b8129fb61491dcf9627ea00cdfab0aec7cb7b4f7c4f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3349c879a5893459b769ec578992a48bc09f4cced03e3df3c03b1700bdb6cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOU4P1701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3349c879a5893459b769ec578992a48bc09f4cced03e3df3c03b1700bdb6cb. 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/NOU4P1701010.