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 0x69efab05bfe81c96aa60fd86d17cd5c411cd0f825c98281eb2c1ac91410142d0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb5b36f9-600e-4db4-8dc3-aa43256f99d9.json and https://artists.proofprofile.net/proofs/artist/fb5b36f9-600e-4db4-8dc3-aa43256f99d9.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 0x97bd32bc36883e7ce4234dab5bab4d7c8613daa17462b85927c032dfb1ac047f. 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/SE6QE2249181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aa6ddc8727c2cf125f80b0988b48cba1f809668a28391d54b1d9e04e927edb. 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/SE6QE2249182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d341fca945ab6deaa58befa6acf246599ec4f5d21cfaa060378a671b14c645. 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/SE6QE2249185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021795ec36b5645087bc585ea5c3e42fc1638a574fc2a66cd8f6ec1639574687. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SE6QE2249179.
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 0xe4a4add295b321ffdcb4050dec6dd38885dc6cec7a07fdecdde85a13e4883a25. 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/SE6QE2249183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a49ea4c00454f064860673afd5b5f89a10020c69dce03d48bcfd9e553eb8e4. 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/QZTB22465359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceff4ea0395d3762daf62c8a900b01783ac164c2fa4688458dbf3ce33cd82d4. 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/QZNWR2413445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b6ee62664a5f934a7fdc334045cbc1396f0faae4b776937296c7184fe5c825. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:58:39Z), 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/QZFZ42423442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb952d24c1c476385c7fd0d6538240445ce7a71ac52c7964d21984547997b8892. 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/QZTBF2341427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aae0d05b47624fdbeee2cd9e0a4a5d8a92d5e6fd30f10644f6bf4b1831eda31. 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/QZTBA2307106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139efbc5fda943ab1c6f80606d3ef04a836c0ba56fe0ffa3e61fccd7613a7ab. 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/QZNWX2379797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc0704f85948c4029c24bd9e36ef55b5c77fad8943bf0dfe6d60654a587e9b. 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/QZNWQ2360146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a7644a376914d2f2ee9eac2cafa736aa92c6fcf2064f81a243c86aa5ec8125. 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/QZK6P2391418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce083d0a80d8eff181898e44be13f6c97fdd2f3b25305d4f02a4730e772c10d. 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/QZHN32323474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2469d43e088be989d29eddebfeb374316661332bf1fb1c7cb61c8b4d2e42d1. 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/SE6XY2264065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaf53e258f2fe232d734efc84d6b83c030ca5f8c52a8589bc26a5a315137193. 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/SE6XX2206521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc6377b927f8db88703ec3836a14237d51391d2132ba2ea0c31fd26145c53a0. 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/SE6XW2225124.