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 0xccb529537cea122d4ba48386db308ceacd7abc93b5922e75a2536e3d097eb35d. 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/e8e9a8aa-3863-472d-9f10-171418c7541c.json and https://artists.proofprofile.net/proofs/artist/e8e9a8aa-3863-472d-9f10-171418c7541c.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 0x2b9c149b4aa9ba37596ac41b1c63eb1563d24351daff32395ae0ff231b4b058d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWR2067460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59532fde083df6acebff8b6804413bde75824497b237cc83b77c0b885f438c7c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:44:15Z), 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/ES71G1843090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59532fde083df6acebff8b6804413bde75824497b237cc83b77c0b885f438c7c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ES71G1843090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b30221018874b9b45c1f7364f639989528ab3fb8dd42a7ff6d4c0091c43fecb. 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/ES71G1755109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069e19b2e28be59cad740aacf4dac93be9cc4f265df6a624ba03455cab01c63. 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/ES71G1628141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff7d2101d13dd017a8594cf1f7009790843fdd7b04f9826254560dda1999ffd. 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/ES71G1912355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad321398e5e7a75697c9332c8f425a24fda95b0b694de54984a43c2f53cfe16. 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/ES71G1755100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a05bdb28d3da1ce8b4d3e4c641938b0a62b2b14bf0166e7af06b7f11bb3a1. 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/QMGR32042915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfc2bd5ffff0cbce052d30b0aae30758c6ec4b343296750e48df69b0ff32a09. 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/ES71G1834881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd4afe76930d72f256d6e8bad0e1586c14150fe8fdb7afa6e99403c28a77e4. 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/USUYG1175833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa74f7bdca43bf7aba423df28250baca275585218e8ce435aff7e6b4a083cb. 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/QM6N22484443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2caf1179b71c887a053a02721166af0b3178699a07ae15e32799fb1cedf9db1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6N22484437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf108d54818cfd060acc5a9e7e47bdb553a35e6c24ee4bcde09b2a7b3f2a9ff4b. 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/ES71G1635254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069e19b2e28be59cad740aacf4dac93be9cc4f265df6a624ba03455cab01c63. 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/ES71G1628141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31009031615539ae1fc65aef2a141cdc67122b2032d489105bf68ba136f646e9. 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/ES71G2107705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f306ffeb83ac2de1f7ebe8ae7a3506d2d55df20d9496dff9df3acf2f3d56983. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G1755114.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101c692225dbbaf03cda307bc71e23f1ad89ec6a075ede96f9bc27729872c011. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM4TW2132553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97762a84a6b97a98853fefae34e691eb3f854d794e0ea2e8bfc70444879dd01c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G1721706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f31a2eb445cd9172e9cba6e0b9aa566c07fe590ade8e98cba965f736152171. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCABQ1335874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c02496561b4f5740ca739ec5df4672f69518c1f16a78375255309ab9fa39f0. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ES71G2107704.