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 0x15fd031a8f43cd160628cc8bd9ee425ba3494b8bd2a8b3e01a292ccaa97cb33e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bef8171b-992d-433f-9e03-de60186a712f.json and https://artists.proofprofile.net/proofs/artist/bef8171b-992d-433f-9e03-de60186a712f.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 0xe713b49ecfa3867253ea901af567927633ca4c5af35ddd61e8a73d91a9a3604c. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/US3DF2449402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f6c624fb4aee29c9df567aabb3f5dd785e83bf4301bdef471cd64cc76e670a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2449403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5c95ddce44f728fec324e72e7008fa8977ddc52e356d233a03151cf3196ce0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2472145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a468df670063bcd0a559da53259d4b571628abc570560039ecfca15f4b3eac. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:25Z), 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/US3DF2462056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1404ec7364e0792c2940c88a929ace4ceca47f74aa059c3e9d5e958f19927a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US3DF2487674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf474e3a51967f264df90ac747e4c614285029f1b01f81385490ad12349960d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:06:05Z), 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/USANG2418726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5502397430f35d4de61ec31d2ce024b13e98931e57fb320c618645b472d39a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUGBT2435298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd6ecfa04b81377bacab94c4537cf375d4f70d4431c70eafd95b9169385bc19. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:55Z), 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/QM3DF2410630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4243f443abfa840d8fe1496a69341f320cca1d96e963bba2a8e85afd7b4964. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM3DF2422758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4fb06af9dcbf033a03e45476cc2331b9beb2923712f6cdf9362feee7123ce. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:28Z), 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/US3DF2505534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16069408dacef8c73f3c0899993a1cb1e0495ad94ec8a4092d4284354c16d453. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US3DF2507926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d0cb17f72b4aa85e548c9b25cdcf8b09de4b6d4881c21e51bd2fb63c2a375f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:37Z), 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/US3DF2536970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8a791ffeb70ecbb45cc35b383df9a98e13c291b49b6f109b84c401cd54fdd8. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/US3DF2536973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec291fbba541a33dde83575c0a5d652ff1178df1b9b3e47d11e710c5ed8570. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US3DF2557435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3b35600c3ad532058fbe3e5dd619ea5476b49847d5f45da36855041ba96a71. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2581915.