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 0xb1bf610f79f41cd619daf7f406a0790be5919a2388b453f1079196526b58f746. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8dfc993-749f-4443-9432-ebd3910f9c7b.json and https://artists.proofprofile.net/proofs/artist/b8dfc993-749f-4443-9432-ebd3910f9c7b.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 0x221f6786dc7bec08f23b28358e908f49962682bdff13c306527bbf3a65e36b10. 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/QZ5AB2317619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15466f825e9180d19eac68bdd01b43e3829abd638dda9aad84c75b57b62ad8b7. 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/QZ5AB2317620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcc56e948067adf7a6f59a513c5e6dd18425b6753d537748c0e6a51eb14e90f. 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/QZ5AB2317621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c5dce18726b57f1c09792aea0bbe79bcd8955047c9a4c53e770ced90d48f32. 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/QZ5AB2317622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e70690deff31471adf64f605df2459dba1b17eaf37f957df8770917ddab01a3. 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/QZ5AB2317623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad646fc42ed17c9658d22b4b1df5c91cb930a02cfd1d6ac7e697aaab7274ae6c. 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/QZ5AB2317624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d9f95fc54dbed6b35497af4db5bf313468bf3b09b7b0d9708189e155a3d402. 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/QZ5AB2317625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66904cc5340952987517d951b34a0abaad0e5e4cecc3a264715e228935c5f7be. 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/QZ5AB2317626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850439761bbe4618b87d4447dad2125e67d3e6d031f99611b52e5a2776eaa8ab. 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/QZNJX2384591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd1894a9730c8841e1286c7f34cf48faa6e1dd7821715d4c04b4eeb75bedf4. 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/QZHZ52043194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62162eaf5f263a61719510e90a9cea604a8c6974e803b93db3500ba3ee2faf8e. 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/QZNJV2406815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb2b511014eb490c7a019441afdf08df4a4eefb4a64009aa6b88957ac9a35fe. 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/QZNJV2406816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ad69033cd795242d9df2679ec5db3e84e0aab055450121baf89ed1522848cf. 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/US7VG2470641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e27b3172bd5366f9041efb19b65dcdaa70d088a420117761f63941fabca030e. 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/QZNJV2406817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a6d181f1ea69b494fbd42959b4a25cd6f8fbde24f99f13a10999896056a2b. 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/SE5BU2462573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a60ebbc8f9afc0eaa3ac6d323a0cd4a099a0d539e6c1fdd82487c8e804c701. 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/QZNJV2406818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336e0e878c6f3991a9ad76c83dc2cb92e478a1ae89a2cb077df0b8d090b8b212. 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/QZNJV2406819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e92032220d831552472814ec2c64c63656202b8ac7b9f8ec7cedb42cb224407. 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/QZNJV2406820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47fd9aeb0d8c628efa44f6b04246be4b7983a8e16767712d9b5376d84ec117. 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/QZTB82247526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332a8cc4f243b7510290da16095f4954279be1d1901f6c09b05c195a985937c2. 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/QZTPX2467861.