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 0xfe4b4961a0060fcf7e75ab9d67b01d0cf09b40f36f45342612fbd0a4abdccaa5. 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/9b720f8f-bd41-4488-b7f9-e1e92cb8f25d.json and https://artists.proofprofile.net/proofs/artist/9b720f8f-bd41-4488-b7f9-e1e92cb8f25d.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 0x89f2e900d316eb5f6ffbdce2a50489bfd19b2ec947048a41b0322784fb225d18. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCA2A2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e803f67340c2737336cacc243439a47f8a19b2e9607a99b6bc351f25304b1. 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/BXIV82367872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f0477c283dd072717bfd2083df5982711bdbbf1f8af3d8d493289516f18bf4. 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/BXIV82404663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527525d4378bf44e33cf5a208f31fcf288b8a4cc57ce568cb7d82614194d1f8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTV32586747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851cad773a4317e31760b60f894b504b321b606981cfaf3ff9d0915f186957d6. 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/GBRKQ2552119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d5e7b354bdcd6f403602507d013fc162e91c64186e3c407f093d968cace4ee. 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/BX4IU2503145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b57a39be010856957042f9fea0f4ffd87bd336994d67855038fb198cd11f0a0. 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/QZNJV2332608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c388240083df5326f4a04cbdf46536b2692a2f3f6fe4dd9598cd99512d51531. 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/QZGLM2368421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb22c62d304563a4b6f7944f0e70343b19c7fd221e7aa7320d3f9e572496197. 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/BC6M22538920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe557c8dcb9e6771a7d1e4ff04b2515a6ff545b684e0d904b96a9e76c766e4515. 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/BC6M22518448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2818d2a1867609d87abacbff0fbea2b6a5f8bcd8886ce4aca0a4dfddc78ecb26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC6M22518970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa245ca6c33606b164ed20d26715f911807e6ff48c43963ee447cc5270a251c3. 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/BC6M22585097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbefbb1dcb27a292d86381b8319434dcd69116183daffc779ba3112e64e41eb. 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/QZNJY2415298.