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 0xe36c96db49391a3dbb1af37fa92605560638148fe657df099295cb5c15710d48. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/360ad47b-aa43-49b6-af5e-a980cbcc1789.json and https://artists.proofprofile.net/proofs/artist/360ad47b-aa43-49b6-af5e-a980cbcc1789.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 0x27954dd2e3861a20a46e7deaf9b46196c9cf7c4ad6b19f9c0e52a638a1852181. 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/QZGLM2475810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a9604bbf0d0707a65eaa6ad433a608ebc2e0efa32da33c46688f1aad3723a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BC6M22509502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a43fee15be671163f12ccdb16bcd0778df611ac4d33f32e6068e2f92440e610. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BC6M22511370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e3f0eed7038197cf96e7c075a3a5899cbcd2050579fb688df842aeb433b597. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BC6M22513833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379d7e87a81fe44b912a5d9d763f009899fe8b8945dd8ae220051045617784b0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BC6M22539381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379d7e87a81fe44b912a5d9d763f009899fe8b8945dd8ae220051045617784b0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BC6M22539381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b334ec0459f128885f86e12f625684611fad77f3401ddee29376ecc90de55c2. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWV32556953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6ec775853ada17292a452cff447edb08e76b36895fdb9b303e8ecb7a636963. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:48Z), 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/QZZ8A2540521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7831b412e6e15358fcbbae6ccdfc6b159e873c9ed14dd0a7dc68fc607c03b5d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ8A2563588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccfc6c1202336cfd8f806012e360b3b54bcd76b117bb8ec0016e6aa01985a0b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8B2514996.