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 0x23c3e36e4b8f51e9296ab8e51bbe8cdfa9bbb4712dc20c3181e7b52f1a8d5619. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb01a6bc-024c-43a7-84ff-5fbf5528aafe.json and https://artists.proofprofile.net/proofs/artist/cb01a6bc-024c-43a7-84ff-5fbf5528aafe.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 0x3a29d855ffbbad9739702cc1c9f1f260c18987da377bdfd91e4a060cb408e437. 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/QZTB62323482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f6e446c91edc868b5659be9e30f5ac4968747362e80aea81864d54c0b86a6. 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/QZES52454593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68ca79827c523875898deb6278b3fdfdbc62a5dc5be27f6ebd2dba3975cd71. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN32452713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cab47b91ba9cdfaf736d06b4af121daac34cbf917e13ba8f9fa46b2434ee23. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES62485385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ff0ab751a84597ae97c99dd0d3c937cdb1e07da66b01a63546424f34a5bbc. 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/QZNWQ2419219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21f0ea6e9140cb6e11d631ceb05245a7b86054d7d417cd862012800204e0074. 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/QZMZ92425336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b6bb7d114ab42494bb3607420c537b68f5169f22f2fe4129399bbd29666905. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWX2408053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aa0f55c6aedcf01208b61da013e6e8952c76e9a5bb5e65345d627669148e08. 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/QZFYY2433253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dc9ca117ef1923d1f292a29d9f5e6f272e090af3410d242bc37838d0675cab. 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/QZPLR2431468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77942987e73be2602362cedb2d964d4925ca3f4038263991d8141291b6543a5c. 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/NLRD52323359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1e52e9137e75206cb46b42bd7e8f26039ca34476549f35ae63c2cde72e38da. 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/QZFZ32484146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b8740cf58344aa02d86e3916baa67f03459a903ad45be9852b78722eeda53. 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/QZWFN2366188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec01a10235656682ee838cdb15b1b29f403610bf4b3f8d4e11fbef6bc6fb287. 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/QZWFG2345765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f0b8255895c31c9b72d05efe9562d6bd8816a0a274a0db6e8db333b1ab58d0. 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/QZTBE2346801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf682aada37054f05f054f282e46ba88bf347d285a030bdbe2cab6f0dbeeb7f68. 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/QZTB92326439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372a002cbe5600cce79ada4358d0a36d1a4941cd52d93adebdbd55049bea12a. 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/USMH92370603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c2c2d5c0afa9f02031d9c3fb0b2553e33402c0e94d96e5b3e330038bd0ce0. 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/QZMEP2277799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1771a8986bed843060fabdb3e8d2c6f03dd25b9f63a61d36dc917227b4dc54. 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/QZHN42049012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54c168924581df1ed42da977a95bef74711f9b4c802b5f201dc2928d4269d5. 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/QZHN42049016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d5c5a94227acfe278219ca291ba4f1c258af636271fcb248730d3da3ba9ea2. 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/QZHN42049013.
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 0x645f6ef532d552e457eb0130f4a498f9fee10c71a19654cadddd8b0c9fe89473. 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/QZHN42049015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c0ec8690717075a28a0a4bc095c3cf7335da592a5a71578f2c25985925ecef. 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/QZMEP2359546.