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 0x928c9c06ca2743043e67958e22010e200bf608facd602a0eaa64fa50c7f44c1a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/895c8ef9-8a9b-4cb5-8555-2b75889b8632.json and https://artists.proofprofile.net/proofs/artist/895c8ef9-8a9b-4cb5-8555-2b75889b8632.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 0x44d9261da1eff935ee86e1cd1d9cc423e2f561e24d3aa906bdc238cd4d336bea. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGJ1982459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa55c1c709f15d3f8b33b3bf9f351ff5bb5fe60535e4940243a9da67758327cd. 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/USCGJ1982460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33eb4a24675432b24ef2ca94f4452e218d176b36a282efe31986dcdec647ad7. 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/USCGJ1982461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33dd1085aa413e904d278ce48faef29417c3aeb24b75a076a2b8c0ecfa352da. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1982462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c370d444da567086893613716bd4bb3e82e21d9b2a5580eb74c12ee67d7eae0. 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/USCGJ1982463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd92b9b801801b3eeadf2f6b02c250b18a6fef6d7c29a90f2b0d920407aab5. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USCGJ1982464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ead341391ec76027d72c147cfbf789b728b68856112e454d7b9ceaa243f06ba. 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/USCGJ1982465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a14b7ef89f9e0c8e6381e1fb46f87c76d63e634327f0e4736b9ff5559b4f42a. 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/USCGJ1982466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015b08a727cff60a5f19e5e61101a4f3f48a8ce5c80eb96b6769e5bf2614ac62. 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/USDY41801621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51bac538fec34885afed07f59d986a111bed988509181e001d7a36c1323bf02. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMFME2176385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991468cefda47bfaaa50ba377162b1ccd9664a36f0407452da6e323a5161377. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMFME2176395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6041048ce379a737457e79e6378eb66acf3204a97b3c195f018d04a943418c88. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMFME2176401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d27d65cb9d6043b4e2562d558cc4e1639cd90682e7ef8806a6a10fa85e357b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ7LW1804333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fcf61a0381162ae53a48916c0bc6c476e2d5b77d7b2939a41e02f39bc6ab7e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZZQA2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4034eccd2e38531c52f108cd605a52061cd363e09cfbfe5b7e4196125fe33826. 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/QZ7LW1804334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d00da59ba8932db41702cfd98c004ed11638cc8fa4c1d2a8847e79fa5880c8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ7LW1804335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fcf61a0381162ae53a48916c0bc6c476e2d5b77d7b2939a41e02f39bc6ab7e. 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/QZZQA2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa17a376cb536a618e8a511939d902a8eba53ae234501db10cf315a21937b076. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZZQA2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d13b30614235b9f7df22bed22fa2dab93485bd6d1eb494c82fa19a9a8d0486. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZZQA2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb9303e3ff3b765adb8388880e1d607c25193bf1cb629a992c150c09cf51615. 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/QZZQA2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4000d7ab7359a3795ee1fe6425cf5299572492cc28384222e03a82639a5c3aa. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZZQA2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d13b30614235b9f7df22bed22fa2dab93485bd6d1eb494c82fa19a9a8d0486. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZQA2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff907de29ed24304f227cae876cbb536415854acdd2c9c81d9f792b2cd5c292. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZZQA2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f338a17e9787da99b3786565c7605ab8ffb839b6e658ddda254d1ffe2f4156b. 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/QZZQA2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa17a376cb536a618e8a511939d902a8eba53ae234501db10cf315a21937b076. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZZQA2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1284118aa9cdc62e23c9cd21da46f380fb390e1556b88c190d47af3d2eb75c2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZZQA2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cee1128e86ea3a087f6fe8cdbb20ae3bf7991aec39a14bb1ab8f7704a3f4b84. 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/QZZQA2400008.