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 0xd4a931e56e44e48d0cb32f8afed04d886a2d8a8f8ef0afca41259ffd6f76e028. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84c9ee5c-8bb7-4400-8136-415e4dc6bd13.json and https://artists.proofprofile.net/proofs/artist/84c9ee5c-8bb7-4400-8136-415e4dc6bd13.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 0xc2990716cbcc03c88dca5f1cf04e55d63ae60782834f66714a74cc301ea1c9e3. 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/CH0689602379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16780276594dbc1e2e70c5be6b1f49e661b374c4c1b2eeaebd7032e5081a4e92. 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/CH0689602380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748cbe40bab8807caf95ab0030a2f9da4f087eced3490f6e19ba2fc51b7e8951. 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/CH0689602382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db725eef3cce7a43086fc5be06d652ed619ab4b87d0edbd7b6168aeeccd3b90. 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/CH0689602383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d010fa15cfbf87cc55d37d12d6d4365a4d8c6a859471947964f2513e79d1bd. 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/CH0689602386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c0f6ec3cd9f9b6de7a175b17b54bd055a3d34e388975dc84dcacb2f2a0d5d. 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/CH0689602387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25ff3c0152cfc4e28bbc0a41963b051f3959c2b5fa4cc7df7c3ae58f66f329f. 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/CH0689602390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18906b1fd2978047c4a36891133207aba3de23dffb410a43ed9db4d69f4a3353. 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/CH0689602391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb34ac294ddd67f9686fcb2541830f3d47fcc37a3df2f1187d70ecb2dc446c81. 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/CH0689602392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66159711e330b31884c6e655a95211945a54ac1ec1ab4739d59e53af5c3bea0d. 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/CH0689602378.
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 0xc1f141566c9b544e3a979738be1508580a7571efad60b0bf7765d0c27903abd5. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CH0689602381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aa1795b3dbd6af99f2f9a00a6ceafe9df7f806c768156caa302f3f2f496d50. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CH0689602384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf817cef00790203377c81658d71273f63adcb5791aacfe596f572d735078f4b. 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/CH0689602385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe185ee21bc65df2f222083b536100cff319135747a25a32130611cca2fb97352. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH0689602388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b87e1ebb7728b20a29f28271e74dfc5d598133945787bb997afac37abdf2d. 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/CH0689602389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b16daedd4fc4cff21c25594df2356aafb875f19090ae70ce45f1978d1179e08. 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/CH0689602393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a5c8020ede0ce7a9745b128d49fe453e6c8c94a5a684e3a3ab4e411fef8e1. 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/CH8381601301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a2f456480bdcfb16620a7a0b8d949edf03282eb5b0bf2b83109b2ebc4a2a20. 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/CH8381601303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5290f0f3a2d9c24af95c9434c0db159754302759846c47d3cc1d3978024e06e1. 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/CH8381601306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dddaee7ce1c8ab17840ac1d42b4d5b551088306ad654aada20c9a464e18f0f. 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/CH8381601308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2190865b467a1f679718a7402f848912af55ad7997d5924435466bc6a3ec32. 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/CH8381601311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efff07dfc753335988c7c1572eb72323b7840ac25f40804adc060ddefedc0de. 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/CH8381601312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c384b5e204840eebfb495b8d7d7140a8d06349ebd2d6880d6199f1becda4421. 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/CH8381601313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b364f2a7b2d567488165fdb3b258b17e49903cbcd4cdf58b786cff553af16be. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CH8381601300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcf251c8636ee6249ba8663eccd3809e3eb7f64de7ea3ba709b8d8276062a5f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH8381601304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae45367797ad941bfb70abdbaa6c28ae076477b9407784be80468d16691cbdc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH8381601307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35740d208a27a3b5186c0be184748c2ad0336745da7258bfe1c7b6e9350c2e1. 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/CH8381601310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b47b02691d6400b1443f67bf8872a7e2cff972f0e4325e322c5446fe6c02951. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH8381601314.