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 0xcdd7f8f06af6638748b312321ebc217729c4e8c2defefd1db78a3987557a9149. 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/a59daa8a-bf6b-495f-a4dd-ad768f85356b.json and https://artists.proofprofile.net/proofs/artist/a59daa8a-bf6b-495f-a4dd-ad768f85356b.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 0x1567bb2fafd7509e2d4fa079f6f006b6c618046a17c204c299fd6f5c900069f6. 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/CAGOO2414522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680258325e78abdff31f2fa643ff57655abbbaf589c9a0620703eab80ea114e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:35:17Z), 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/BCNWM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c598f71ec9ed11be983f89d10984e5f0d648165a2161c4778a8ea3a9373693. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKCE22200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37056bff03a6fe3c5c5008bbfc5aeee41f96a0156d7c3d0dba766d2bda58933. 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/QZGLS2377316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4a94e042d0e7234e3e523ddeb0b110d6c9b59d5932c7294f46b48246566294. 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/QZW9N2268824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875cf25fa9991af4a74fc271a8572e3f477ad42276002e60ee9f9cd9b04ef95f. 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/QZNWZ2276109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bafa3a012540d02aa2cebfec7c7365a95e2008eb554c9f8d947375b48a49a7d. 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/US3DF2216740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33268bb0c8c7f03113fc78b1fd9101a4c518f1a4ac7be0ee1a6cf48a3d89ebdf. 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/CBF8B2412268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38ff19b4b591c8cce69df6a9175994b1fa8ae66b48284e052e3775a5225f7b0. 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/QZTPX2454862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9394e80e69cc6beea41e580c76f181f230021dc4b7f6bc4a71a28f687adc522b. 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/CBEYJ2437216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8202ee1afe76e50040e3239868c3eaaef9e010830ff1b255f5e72df0672c7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTVM2439668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f3f12ffcbc46dde012511b7d069acc70c068998dcbf0eee89daf8280fae904. 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/QZTVM2450876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a956fe199cff6ef3d9064f6efa85bb29d76026a35ae082748c2a932da294ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXBAV2130810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdbe85b213666b0d41f8670e02a77e2afe61de9e523fc53cfc80ef40171f753. 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/AEA3A2193608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323b90f1d30f4741f63265ec8400b7b3131da766fb839d25e1e7e819b2a0799. 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/BX4IU2418714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11670258fb9395f553a196f712389f2beb29521553d1a61f1bb3e0982125fc. 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/QZTPX2442890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad5c2219f82063a617fa6fd85858ef79d462dc5faa92767a9c3706fd4dad92. 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/QZWDW2511979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680258325e78abdff31f2fa643ff57655abbbaf589c9a0620703eab80ea114e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCNWM2400003.