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 0x9b8371313f0db0c3b1e08abb180ef23ffcbff9cfe90f9a77e14c44aef3bd8049. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59287610-56f6-4349-b120-45c8f676ab05.json and https://artists.proofprofile.net/proofs/artist/59287610-56f6-4349-b120-45c8f676ab05.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 0xeb5b51b0ff946b8424b0143dcd75827e03337c4adc76dc48ab38df1c0e8594fa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USTCZ0991756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70267a135b578fe27c5b1fa768d2b35438319945d3eee5eb9ee56cdf1996d3b8. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USTCZ0991757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa897942adffe90c930b306a9598948185960d39ccf05cab84ee12c1e45112057. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USTCZ0991759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62d0cf50134b32fb6e37ff9159864e9cab1a102d6b935fd85617932852ee108. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USTCZ0991761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273681a99fcd3a5f8f71fee34563b9cf0044632f65f1e18788808b60dbe24cc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USTCZ0991762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd7b8e6ac8112e53241bd3e2d3116659db36f0a5e8762adcafab8b7fbe03d4. 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/USTCZ0991763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d11d7c75bf9f0cfab12d6bb5d8a7efc29ed0182a15898b4f5e98d6abac5aa. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USTCZ0991766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfabfa11b651eacd6ce39cc1f466e9cdbf41d2f693ca23faccfd14eeeabdbb5. 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/USTCZ0991768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f1b652f2de9cd04fc356f6a0176057d184c990936ca6be4bbd54d96d41735. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCABK1281443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f8b22a5b8b37fec66c184beee9271530934fdf9baa11684c333c1b0ce99c5. 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/TCABK1281445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b50d6e043a43cf7895031ebad57ebddd693d8319894e97ca0c6d11203de136. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCABK1281446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcfdb75bbd49b8e03accb952917e0a3f9ba96d982f41e348efa35ac8b7e40f3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCABK1281449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f1992d338f0e46b8f4b3d9c5ba6b20b3d96448ace0aa46b2ae0bae38a565f6. 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/TCABK1281452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a869824bdb1c23a9917bd697ab09a5926e2e2e1c548cf0dacb7305f17a51021. 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/TCABK1281454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a9c680d6c618bc3a8d5b9795921bcfdd5042c5ca68e7ab2f3e0015acf99b2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCABK1281456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c389eaee0a7394aaec200fe08a1ba693a18c0a464b7409463261870001b777e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCABK1281458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f8fb4572162bcad4967ad938b2ae7dd94847e49ae09d8ce7aa526b286eb467. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCABK1281462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a60cc694f75219162fae68178c8ecfa5a0e67eed93cd08ef094d1adcd0b687. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCABK1281464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d46c410d7997bff297c9e6641a471b8eb976f3e87c6c6803547b39963e6af45. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCABK1281466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8be10b981d2333bc0db11420fe29a3f4185c9c687bea48edd7bdc752faf636. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCABK1281469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b70c016d3775772bbff56ff3b29ea71715994d5b67392caa223cb7fa11db2. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/TCABK1281471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69456bf34418a030fbf5fcfc2a3c7a10ff79e1523f7abdf137ff47be691e3ed. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCABK1281473.