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 0x0814a0c46f2cda445f775b849eca6ef305c11c4ff2575c84305f87f8a8ea8308. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e470e94-38cd-4d50-b348-5973189f19a8.json and https://artists.proofprofile.net/proofs/artist/2e470e94-38cd-4d50-b348-5973189f19a8.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 0xf8d87f8c0f2b2bcc7144123ccc5cd0f4f1e9eb7dbf3699eeb29e0806090b7edd. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CA5KR2407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8720929b330835c463434cb72404c1db40a0967e86f10f79e75daf91a6cef45. 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/QZWV32545061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eaa82f7e14cfb17ce1d8610a96bc75dbadf0e6fbe89a3f8d97a0a756120563. 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/QZWDE2555214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834a8520d0967b6deefba50a79acd1354e943473b200000b02b8f150e84ee897. 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/UKXN22552513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd035669e62418d9c6a43d4a395690cf59d98e63b1b5ea757eb56de5f51af00. 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/QZZ8B2471223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eef8cdd199bec97016ac0a24f826ad5810d7e62192796ade31ec2fbe4788ff. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZZ8A2408438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f19886466a1bb746724b868f94afabd4b7fd72b2213b15842feba4ec22bce36. 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/QZWV32446328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76092f3fa9451321e1e977c4253a28a8cb6cd0809bb2ca0b20fc31a0fa72f8bb. 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/NL8RL2338489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c14938546951b463128adab84508d4eb7d6c8ad8d1cc9546ff73b8752e66bd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US83Z2350139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf416f47b292268f3b4979afefdea1ae66b9bfbde04f1a236d42a8c82d4a7cb1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMHP2343690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff3f57b3eda6afe6773ed22caaf7dd32cb9e68cfa575a977fd02e22ee91378. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ES5063200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e74346e59446293a82ff8929c8fc53693f27c05592e8cd769b45b0305de33. 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/QZHN82042839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942269339573174ee22fa0b10298b27ec8a84ed02556e1becac545a4b915350c. 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/NL8RL2338485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53c8d17d46f5a955fc97cceca68be2b1c3d55c37f0e38d29db74bb9bf1b7bcd. 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/NL8RL2338493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730993c11e53c293195e4847f2e41afa19a6d64b3cc5c092d3d696579010994b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NL8RL2338490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c693ccfa76291d197a26c68f013ed0f81be48315fba79dd6d68b2f155cb2f7. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/NL8RL2338486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641f628d5e989356d89629629f806fb55d25656bb1c0b040340df4cab65a66c. 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/NL8RL2338488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a307a6df3263acee2ca717f38fdc5f2153e951c4e2e126f02ac70bb1b28e41b. 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/NL8RL2338495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6075640bdfd5d542c9d24e15f7e46252ad587af6d9d1a34797998405a34b3e0d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NL8RL2338491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64648b7650f12a8a3a27c33fbff629b3ddd2724af7f555808963a73434679dc. 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/NL8RL2338487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14702a0e0dba9505bd1b6dc9ca00822564426a0e684c0e8a2c05ccfb9862105. 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/USYBL2101645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55e20f6e05915635b4ce2c1d983635481319099c0c8cfbd686bde6a82baf811. 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/USYBL2101644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc14e6b827324e345ac91e7c80204cfcfae4aba0ee27eacaa506738b96e42237. 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/USYBL2101643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46a188ffa88e593890b5239f2f2c7830ed91179f65b7605a04752b25336b326. 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/USYBL2101642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3a697242917a3b7784bc7abee4ec3d9a762670692f782040c5a7456c62d55. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QM6P42460708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc4c39692159179e8368e32bc536c0f04435efa31596a78d29567c053bd314d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6P42461718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75fc65e63b4f9e7c5eaaab5038bb781fcae50c3dff49bc267f69dbe335fed6e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QM6P42461719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27984ea26be6b8e75f5e28580e31e269ca0e9b180a55df5c507831ee02e2415. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/NLRD52302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dce2c88915d8a1e172d6630b6811b0c4887bfaddbc5e919b84d1f978d97d7e0. 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/NLRD52319377.