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 0x8fa1f81f02206a5351949b771682119744967ec63147466c633d050527739e21. 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/c45175ce-96e6-4410-a405-848c02d0746c.json and https://artists.proofprofile.net/proofs/artist/c45175ce-96e6-4410-a405-848c02d0746c.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 0x8dc3e425c371f0bc04f5f46401664a89b50c287cf4f5771fa155a47bc99b3b1e. 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/QZMEN2496209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf179fa8732202172c9c096b3d37fbb12fcf0760970fa5bc30ffdd32afaef2a9d. 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/QZHN32462327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4b30acaeb6ac914d01d94e3641eadb35c761dc1cb980fa1df306e899f06db. 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/QZTBA2329187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e546c7bd0cf5ca1f786c79ff51ce4ac64916e3f0858b4ae052b4bd6fe52476c. 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/QZNWY2320130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df10c55ff18ddf457baddca3f5c7235dc71fa681a40b97271639d6405378a81. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2387306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abc503f70553a980dc16c536293bc40b4f743a5f0ce4b51cbcdb4f1565003d7. 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/QZHN82310907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7a0404ba9c745365ae6206f62160dd86a897d793faac10ffed58358d980c38. 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/QZRP42237804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03539a1782e4c0c53ab8aaee18877ea3c997792f0686a25cbacf281994c74ee9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6N2267924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe206b010bad303afd6de54d8a5dac5340428ca8a83bdbb95713458e4efab583f. 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/QZES92217612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97602da2bd3620470b35bb1c2bd00bc66382cfad4fac486c380de12c42280739. 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/QZRP52179413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e3df965d33075b0f5b3a4151e294a55b201261b759a61dc41bdaa3ce0fff4c. 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/QZRP52179414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2310326096d74f3e2d16915fe53fd6e323a63cf17b118906cb685c0354042bf1. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:44:57Z), 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/QZRP52179415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d0fb81250b074719e14ad328b2733927054f02bffffb8b8f9e9f77b3d795c6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAS2153478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929f095f2dbd4474344dc599164d29caf2a77b6d5a51ab12957bb8481bf59447. 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/QZRP52179417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0f5695ac6772c217d33a531da694a15377e888a9461f4381d8a486bb9c6fda. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZRP52179418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe95bb9deb16a503ddaf88a4e37e40536e442a737bf779370ab60c1722aac19. 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/QZK6J2133112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc152fda07a6e06ef437358fb2109b1f9befda8c4591f0e79e099b685a45bf7ed. 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/QZHNB2111525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6564b2f923180abb39ff839f6b930b31952a1b21b471f694a437202bcbe3e21. 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/QZHN82168460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5248588ad9cc80e9c79a6e48d715fc54b1f8d428e577de2f9998a50527d25f6. 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/QZES62124010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5764f12be6d8fe6587b8343ebd176d8094ec1b0c4d99e3c9f1ee5270499a3. 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/QZDA82162112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7889db215b087a2c04e0b9df0ef84eeb29d3721d052e430bca7e1d3a8df472b. 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/QZFYZ2102465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a28afdc297453a6f369fa3918fc3c612613ad223c6827e95593034bd236980. 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/QZNWT2001205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557d58df25c29c8b2b9b6c6ea07ae5e23f064dee701f7fefecc231e96f655e11. 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/QZNWT2001206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9773cd37b5d4cf0e2e4d1c63292d9b3d5bf35f7b9094bd500af947ad3a727d6c. 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/QZNWT2001207.