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 0xc6b4187b9d357f3a0fdfabd55b5574b1dc2558fc443b56a705e5f40742dcb2ff. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32e772bb-aa24-4307-aa34-4333463a9e1e.json and https://artists.proofprofile.net/proofs/artist/32e772bb-aa24-4307-aa34-4333463a9e1e.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 0x53f80e10d5e010af53fe1fc2ed0b03dd754c1abe129efb84d3f3accc288f1635. 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/NOZ5T2304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15272d8924cf564df2f4e27fe9942c5bd5c30624a01404824c416eae709b207. 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/QZHN32317188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c18479ef2f3feb50ed4cbe7cbde376a1b84c19765fac6ca9d11a9b14c59197. 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/TCAFQ2196489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a673f73b42fa7353f9886680475f756b94f6f77d02c7cf87abc093a0207f00f. 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/NOZ5T1903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f73cb21deb9bcdd60e027b215722b96ef5dbc758acec6da0d8f7c02bceb1a1. 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/NOKAW1814020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b844d30f0402e0e738139af96d047e695623d3f330dbed2283a59b71d366e5. 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/NOPGM2404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e6b5dbc9cef4ce9db738d58e5efa02bd8ff89633e13a3a83a8228a8f4952a7. 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/NOPGM2404040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be3501894d5d3bae7c51854a3e287f20743fa0a277fa90fde75afb5b922d889. 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/NOPGM2404050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd911f591afe6a361a9da41820a7a912b27be90d1fb13d2dd4df3bd6b02402f82. 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/NOPGM2404020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb206585deb1db14637c9fee3733c3aa7476adf908ad2c21d9533b24a621b000. 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/NOPGM2404060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff56f65b130057b30deca40c859b9774fbe7bf3e873028061866d45e7904534. 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/NOPGM2404070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a890b7930163274f601061a0e3439ed3706ee42fcd8b7b73d72138d03a81dc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOCKK2449010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a890b7930163274f601061a0e3439ed3706ee42fcd8b7b73d72138d03a81dc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOCKK2449010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaee6ba42fa66eed843253be286c9f70cebd9198eb772df02266924f702a0264. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOCKK2449020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70ed8dacde04ad94d0416278799483572405db07c811d194cdbe4732e3bf95. 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/NOCKK2449030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9a162084e53f38a7a0ca327cdfaabd982338049590bc7d693db5d97632395c. 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/NOCKK2449040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0490a1741b35605404f0a575ab12c24722575296ae82c0c0af6a8e3505e5010. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOCKK2449050.