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 0x785308a1d962a5cfebaace46551261b35b07bd30526569b32b0332885f2f1ab0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad87de2a-e955-448e-8119-1dba10d5d537.json and https://artists.proofprofile.net/proofs/artist/ad87de2a-e955-448e-8119-1dba10d5d537.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 0xf793c9f797c842bba7c033527ed493f7a7cf6687c3df1245b61e5c5832fa89e9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ62468655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaac6d9b1d53c3b06fb1752b2c6e4ecbdae103cd44629aaa08de2044495c94bc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN82416840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb52f7c51aaedecc93a354601eac240ebe68773866ccf99d88a1291839375aa. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2452703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaac6d9b1d53c3b06fb1752b2c6e4ecbdae103cd44629aaa08de2044495c94bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN82416840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf793c9f797c842bba7c033527ed493f7a7cf6687c3df1245b61e5c5832fa89e9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFZ62468655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7455a3367506bfdd67ed28dfb3293732098feeb03160b7fc167b9f591f7911dc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6G2467140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d174336fdaf6663c91cb98288453f550d7de67ac57db8853ac847068a128a8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:56:19Z), 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/QZNWU2465351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb944c728bc2f550780c0062dc2f0c10fed2d75fe61f67dcfadb0ef4baf124b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZWFJ2404376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee4d589624edbb4caca2f1e0e93ad78cd0fa84ac2b7eb88af9bdf3c9b42889d. 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/QZZ792448855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14286aed9cf4cb0d20e55650154a63687fc3836920c873a053fe73e89cd312d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62584176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d01a8798eff80831b02bfcca5859f5b6b66f416a133c20e9db460182acc66. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWS2522877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72bc9fdf8fd3378b86d52d5c3fa2c4fe1a57a919e9d1eb13456d5730e551d86. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2565850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b1dfab58d09ab5a0857f73e00ee078196cbd24e402466834abf175aac42830. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFT2546091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aba35a4e223e98ba2da1219e1fdf0c59f726ad08cf8e81c6de299aab0def548. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7R2527413.