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 0xcae321d65ee0ace80df832edd853fd9e84eb0d1b799bfd358499f6b4819aa9d4. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0bf6bcb-8eb1-45b6-82c5-1a3d9c6c6a21.json and https://artists.proofprofile.net/proofs/artist/c0bf6bcb-8eb1-45b6-82c5-1a3d9c6c6a21.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 0x4e7082839cf4f4bebbe7d0cdffdb861cf6c425d12a7836dd20d64b81328ecb26. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:46:16Z), 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/GB8KE2422424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3beea690c9ac2d6b2047b7f284146b58751c5f61e7483328b7c8a88a509ac60. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:49:45Z), 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/GB8KE2424816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62178cb7cee0dfd614fa3e269be7148f13905f8a5d54a19ca67997463a48deb. 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/GB8KE2426731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9617b229e445f4336295b23702fc5dfd8f965e3dead2d48455a3bdf880649af. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GB8KE2503277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c907edaac985bbe7cb55433da00703c65e5de7269e1a6023c9c375c03b5217. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE2503278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c32bd5c41d367e6169c67d6badd057907590559d98f476fd964e047c8799f3f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:55:44Z), 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/GB8KE2503279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b23d1ac3fec431b9a5e00c428637296fdf1fd8aeeca5c35c799079db1bf331a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE2503280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daeb9d005f57279ea1d764a958969baf9fe2e682ed88a818633159afaa9000c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GB8KE2503284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bf23334a1bbc1e9cc0df4cd239186b1d33de2db4b57ff81637a47b96472f20. 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/GB8KE2503285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e953bd29a506b965ef3b8df352c81284ecedb971f51d71d019716afed71608. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GB8KE2515351.