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 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 0xe7364a914dd53610fe0b6208c7827a16ae4e2daa8b5dce6f81b712be3c7cb272. 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/8023aee3-acb8-4c7d-926d-e847bd212d45.json and https://artists.proofprofile.net/proofs/artist/8023aee3-acb8-4c7d-926d-e847bd212d45.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 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 0x206649c12e5c1d6aa380b21ab68f703cc17d0afda7024c875e6a41b64d5a295a. 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/UKQJJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc52ed9c38ef7d042cb683f6bddd4d7a5a1906d59f402f7405c068a755a062. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/UKQJJ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e354a8585dd705b021ef9a746f74b28b55060b9532b171b62f89ee081e320. 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/UKQJJ1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dea48518b208f035e00f3fe80830998d2acacb9dc98a6618f10aa53a0a5e05. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKQJJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb19a1250ff00271f07a466a4cad768766150e8ddf12e9d797bcfb9e9d029b2. 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/UKQJJ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af903380b27699bcd7ab86dff3ec05db0c64ef439ce424d0c0f928933e71542. 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/UKQJJ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073722519c05c5ba04d716c616f7bef25b59e02a6191265ce72186b5a5dc46f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/UKQJJ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab517d8b576ee82abbfe8cd065fefcb47f71370aada10f72735049edd43a1863. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/UKQJJ1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53bbbad7e136d3842be58f8cb9ab9351e33cc2918bd6545aaf380388ca64a11. 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/UKQJJ1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799cd81bfc6d4eae0ef9ad866734785b61d8da7b1daec7e10f70fd905f203021. 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/UKQJJ1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a37e17596982f062849ccf3b12fa0124e665cad8d33ece1470bd2ad51e8bc20. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKQJJ1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf733e5d862dc7eeedfa55150592d25c47f26e0d2b9dabe73c97fd3584ef537d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKQJJ1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7790702f2267e4534500d8596403bafcd8d4a035c5d679eeee5df58250c2de50. 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/UKQJJ1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a2fe6a89502afb01c23baca8192ba2aca2200b57068cf30f3baa93d65d4755. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/UKQJJ1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b3b5def32169ca7b99e7578f7719de8b0df218dce10eaf836f601d582ac239. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QMDA62432090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43adc24c36d2353b115fa862d3aeb4370864ab3f35799be2310470c07b93a205. 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/QMDA62432091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56861da3ca423dbbd0810a2ead234576245d5daaf7579a605062fb46899d4e5. 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/QZFZ32218646.