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 0x148de3d5c19986ad6e806797649ce6ae40dce20eeb4ebdd5b9800164c679ee5d. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/940f0fa3-c5a4-4bc5-99b6-58bcc1f12332.json and https://artists.proofprofile.net/proofs/artist/940f0fa3-c5a4-4bc5-99b6-58bcc1f12332.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 0x46297aabba9e5c63e198cc6894624c041ff39dcc80b4c2eff3f6a37ae28205e9. 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/QZW9L2376548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30619633b141c46392df2dc0dbb0e6af52b8eb6c44fd33ad115a6004a6f6593e. 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/QZNJW2320693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324edbb7f89303e40dc3627f5dac03e6d6ddfcf0a9e89ba89d6d323db44c9d5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJW2320696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb35a3ecfa8bfc922d32e3cfb99c397840df4001f87baa31db593375116830c. 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/QZNJW2320697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd875c5554cde891210a2d9fb997580f785e6a0bbce25e52d98d23c821b805f86. 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/QZW9N2254486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f860c6ace978d49105898597ca32cd26a702bcf2b33480cc20dc7e58921946b. 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/QZW9L2279814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dda0fc27af43de180ee9b1a1e164d9421e0315fb90a71c17359c1e78a28b2eb. 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/QZW9L2246137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf830ea9e5f10c518edcae9342981bc65de426a65b04072cfcee10db507c91b. 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/QZGLS2328735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecaead01f73735a7d2271f6ecca208f0f6054780895414344d967c2cb3f211. 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/QZTB92284105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a340f5ba3ea2e1fe0fff7ebd44fb09cd37ecca2b50d46d95f83256abcadbcc0. 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/BC6UH2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fcb91f00e53791cee1be65404a56ceb73d1fa4aeb53e869a7b5d56ac14093d. 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/QZMZ92474779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dab3852f965f953a02dd58dd4b8ba24600f894425824cea37396bc69943ed9. 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/BC6UH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b594ffbd1b97c7fbacdaaf3471b746dc5d3ff8f8f802b8cc5480be69802e5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BC6UH2400004.
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 0x69609490555c249b8faddf6d44dc7c827fe5b97f9739d8795f17983bd625d87b. 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/BC6UH2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797dc2cd6ffe0b3fad16f72b35ec09740c6ce12c37c4e467f6f62caaf8f06d19. 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/QZW9L2260375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76cf6ea93286b1d5c82e7dfc604e0875ed49fde5065810f35aef3cf077285e5. 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/BC6UH2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e948bc3d3f7a7de0d9312564caa7b36070e10524042fe9896deac1d79c0cf. 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/QZTVM2263374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2f6599a6f1297f0ea68e3b571a07701f954ed9e2aaafbe024f9d8c291cfad. 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/QZWFF2407461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d60203d41ff4850d770110e4f09935e00f561833c71d83603cc400eb2f0b71. 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/QZWFF2407462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436563386cef56d3035bdeb683182870dee8040fc4c9d9c8387052de2061ee11. 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/QZWFF2407463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dda546b9e3e7ac390495dfb270f1de24bbf8c921ef37b0d774a2dfe5dcdf6f9. 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/QZWFF2407464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe996cc7348d2910df4a1949556fcd1c78b7f5ef63d48dc3fa42bbbea5255fa9e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWFF2407466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c6d70990bce606fc3bf4d33d6248d00412676a779498fa3599841e2a62bb7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFF2407467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2444fd82168d060d69af6ffdcaaf2b97f23307a5d847ae4d129f1ae19a87a8. 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/QZWFF2407469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee21f7ec88d81bd2011df8aa021d537009f9d15b0592d170ce54fe7eebea614. 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/QZWFF2407470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e909eaf0a1889d7a9bcb9d2db4567db1e43d1359370f18571867abc59c46d. 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/QZWFF2407472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659933dfbb2ec60be60f57ee5c73808fb1ef52196acf6d19722f5f8570c5f4a3. 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/BC6UH2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb3806819bb00b4668bf3b9b1db0bfc5bdb6b89d922b08916921ed6a771395. 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/BC6UH2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233e5cf7201ef8b8c2029706cb651be2be1b31f44d358ef057ac40be10ad2c0. 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/QZW9K2424689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54586deebff243ae9ea46ff30b9058b84ca698010d8ade66e707b241f775dee. 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/QZ5AB2298175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feea77f5f4308e427f231341d8e856b52ad92713b043bfbae3cbacef1678e16. 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/QZGLM2201395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cffbd1b0cd404455f2f558ccc3a8bd352c1230a877bf3a622466fdf85d4ab6. 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/QZNJY2233215.