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 0xf3bb76f38469715461d47219a90d17e3e1afa648c448da9221d7e5fcf785eb7e. 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/0141e5e2-d270-4542-8039-8cd57e74be9a.json and https://artists.proofprofile.net/proofs/artist/0141e5e2-d270-4542-8039-8cd57e74be9a.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 0x092ada1714801c4298a1cd35fcafa8637b1c3de2ddf87f5d4fd62fbbc4afc344. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBMJG1713444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d84fafdd86f5fb6da34a5c9809631dcb3c1fbe75363591e84be0742c587121. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBMJG1800773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb42edb5f753f3e9297d29958969db5210808e5dfe382dd087861c0d476de6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UKELY1800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2061e15cf0c2398e91de44bde1f6eb2f4f2a143707b9a4667e559a3a8702106. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKELY1800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086d0526116e91a4c79d7137b5145f704055dae1bf8f9d053d77533d0564050. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKELY1800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde036041059a981c54432d1b4c0a6879947d4c8726636a6994770540985130fa. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/UKELY1800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbbb6561eae3a0af3b8a10f1e686bed15f582796a49245e0b24cb69b8f345d0. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/UKELY1800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c99a1c18cee1619a8830d1d3ed06b3c510d5a9b384d17cb3aea5112426736b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKELY1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13674a122d734d0f7c90982eb6f501e1aa11b71a6c057ad673850fee7201ea44. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKELY1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2b25a20f9f7be5e68bdb73145013529d951445a8dd05cad7d45dfc38f7fcd8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKELY1900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea6ad35f970f5234a060b8734dc574409a29cc112f781ea54b05097f24b0189. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/UKELY1900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1591295e1cc7f10f09b645d64251e964660e72bafae7fd1f327a9243bbfdd15. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UKELY1900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4665b7dbb91373e69c774d2b66a83f9fdeaf0d204099130452e3cf32ffc9bc. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/UKELY1900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549b5e164228d7ce6311eed5601da260390a7b0db773d936086c93413564dcbb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBMJG2015539.