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 0x8109e85d855f59bcf8f62d793120d61ca8807b2f103e27946a824f51ce9b9a23. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7ba1f84-d9e2-463c-b287-0b7c836a06b3.json and https://artists.proofprofile.net/proofs/artist/f7ba1f84-d9e2-463c-b287-0b7c836a06b3.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 0xab228ac687c100228ba99809b0e343a0bf16cd5ee81122997faa734e8dcfba92. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJW2429849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55af1ba7ff791f6265c11c5c916d428ccf7b7e54eece4e6cc40860479fbd14a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:46:40Z), 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/QZNJX2446867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55af1ba7ff791f6265c11c5c916d428ccf7b7e54eece4e6cc40860479fbd14a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJX2446867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57b267da1ee039080c631c1ede046e64bf562aee30080c77ae3a9d2e0950f7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJZ2464570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57b267da1ee039080c631c1ede046e64bf562aee30080c77ae3a9d2e0950f7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:44Z), 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/QZNJZ2464570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf29478ad746e8a8a67978d203d99a2c6a99a4e5b58b033474d4efd1a1d025fc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTVM2459662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512416dfb57165c9ac8d05587ca4a4eeb25a6eeb64b4af0538245296200f15d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:18Z), 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/US7VG2593293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512416dfb57165c9ac8d05587ca4a4eeb25a6eeb64b4af0538245296200f15d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/US7VG2593293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663e7eee58324da2c1b0f8bcf89fecf69fcbf1c1ed2c2a7511586056f753a2e3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLS2512805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663e7eee58324da2c1b0f8bcf89fecf69fcbf1c1ed2c2a7511586056f753a2e3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS2512805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb703ee426becd8eae1782b83ed32d5b417be4b4bd01bbf63f4a92275ffe3722e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:51Z), 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/AUGBT2555668.