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 0xd0ade69ee0b9bfc65529aa2f982f5a79cb922ae686e167ea0839382d63187368. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f5943f4-1df9-40dd-8d82-45f1b7161929.json and https://artists.proofprofile.net/proofs/artist/5f5943f4-1df9-40dd-8d82-45f1b7161929.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 0xb81cd5c350cf7d389314d3b4d24de836808c8efca92dabe0cdf2ba1d031ca670. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NLRD52406741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e08a1d0b7e601b9537b37a07aec2c08f2a8811d74eaa2b16f9d7994c86fe6. 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/NLRD52355619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904cb36270ff031557b4992e7b81cbf17f93e521e54201c1f49c4a819a03ee7. 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/QZHN42204229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324337cf37083d37dffbd72c6f2ddf020125247bc38ede81d43b79cc9b29c297. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHN42204222.
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 0xdbafa6b5f1b158b3085a202f445a27b5b781dc35cfa24b898f857525af0a90f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN42204226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96e8bed2500c37f77d266b36dfaa4e36c88c29dc1d4975fcbb1b6e59841e6c1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN42204228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b29aba7a13979993d5457bdba2aee2282ed4aa5f53fcc83c3c4ba1727f5ba8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZMEQ2408584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d316fdf2c09590b17f6ae069bfbdb5dfe07bf7498af40b17650382751b842f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2408585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4368c4763422d4becc761f705b1f1da059d9ed273b5446dd82e788cea4c236. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMEQ2408586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8644da6765e46d5f4272dee4fb48eb1d8597c1db3b092117af0a96f0051b30c. 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/INSN12400972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3007bdc8816fbf41f0c9afc526f11d50d7bcee19b70417c2bab17470a77410c. 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/QZDA72422714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca54c076d8e2f85596983ee2b985eea8994940bcf4c1366652379cc07fe7975. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZDA72422715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dc455674ac8ddc3d5e93db3fac2e0ce0771c4e468c6eb23aae3ab0105f7127. 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/GBRKQ2368484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf571d7d12d264e9d88cad52a0b3143a4d60733187cdc5b73951af80d96ae13a3. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZNWX2456312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb98eb9fb9da9d0d2fa95743387135db762a5c8b3b3970bb627ac90d120a13b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLRD52324495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95f307c8969d0b55a25d0fd9a8f5abd7b0fe9ffac46e3aa2f891e0b60076730. 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/NLRD52409580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85e777dde0de989aeaceabd00bb6a6296b5b64ea4e8710326f6ccd248dec53e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLRD52327220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b3c79c93098fb009fcce66ca789b355f9c8a939dd9f0c5a15cf36e427b8dd1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:25Z), 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/NLRD52327223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404ae364982a1ff02ff8c09a1ba5686ea418be59e914da1b340c3ae647c44b33. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLRD52324497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654b7877f8baca86cff2be2b9cb76de5056293aaa23956a1370828e84d0d908b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLRD52324474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9494e81e82ecfb2c910a380e23a31c6a0a4670556a8c96af587ead9a7c71376f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLRD52327219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3eae80b9a69233328711ab04e9949d04455a8f8373e982318ee54a20a6c61f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLRD52327228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456c1de8ba52d0bc16a27d93aa67a2fda691087d9e455fa5a2b9eb50e72c4e58. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLRD52327226.