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 0x31236d7cbe4545d751a9138bc7f6ca9be3d58f61f44d2372391b6a17fe7bec49. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d98b7940-9c5c-40e4-ac63-851f9818f714.json and https://artists.proofprofile.net/proofs/artist/d98b7940-9c5c-40e4-ac63-851f9818f714.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 0x0e50ef345f577ba186c15eb4666137d826a37e770f78d41df0a12d89ae49bc79. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN52530843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b57ecf8b7321665d2ecb9140383cf1638ece41dcaa7591ff08465790b0288. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZHN52530844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b10932ae6a6f4339b744efe1b9aa16eca73942ff72db1749a850997c10369b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN52530845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190fb54bc7f859634ae294f39d5451eca23805e87f8a56f86ce44c4d10555dbe. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN52530846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aad6053ce2223202f991b2eee72de6c210d8b839b0bf26908ce8d10ec8f4a7d. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZHN52530847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13a8a943dbe14b51331091d4355ba5e3c283e15abdaff7685d94632a67d477f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN52530848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db0aecc1f1d5611d920efe5016c4395ee5e98f401286d427c0c549623344221. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:14Z), 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/QZHN52530850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ce31539a1df89c19331a1c5488394ce9226ddc00bea21bb325be4afe216688. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:03Z), 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/QZHN52530852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb1be5161c1d0fea26303f4a2420f2ac4e84a9b840d007cd8a70a42bc324f48. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:21Z), 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/QZHN52530854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a37facae72127667eaea372f8c80f7606028c60041c50422a3d2b936693bbc5. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6J2502706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7e085c769174d0c368462491897949e7ea57dccd79a3164e9493504ee7fb26. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFS2542987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64839066cf954974ebd5bf74a08ef49ef0f00da98ab0dc3033889da2b096625d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3EY2536883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f20ccfbc63e13647732804a37456a4e733bc7ae4b137d86555e9cbdc72e94b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3F72530560.