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 0x06a61fe5d384e5a80ba06c91f80505eb467e988f1debe3d01e94f41e0ab654fa. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea1a60bb-0c73-41d2-abbb-9d0fe428a4da.json and https://artists.proofprofile.net/proofs/artist/ea1a60bb-0c73-41d2-abbb-9d0fe428a4da.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 0x5d6f91b204efc9f6863798901ebbe24884327be1d7ce7565b1b4c4a48c55ec38. 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/CAIRL2407202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8254b37535d9fef531e934e5a7a45e6c54401c047db2e15fcc6cd9f0608759. 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/CAIRL2407203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7861af7b4b34208c80f2bf1beb6440733955b283364b39617dbe91947ae275b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:19:51Z), 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/CAIRL2407204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5902d196ea0528f3b881264c6a9b34104a930d661fb46e95a9b04d905e9140. 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/CAIRL2407208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35b7566c3e44b8f212a9785071c55f2fec38b8547ab5f9c92797e0bb399c8e3. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CAIRL2407205.
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 0x6ba4d04e86421f43784b3beba4b298f477e36a902b0239ca2dac8a3c00d675bb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAIRL2407206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dd4fe7c60838a0c56f76980a8d7617eab6ae7f50f7324698bd65bcffc4df13. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAIRL2407207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721c8ae0f74d736cff45cc4a8dd643b33273868a36cc2ba5f6525ba086473a64. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CAIRL2407209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c109947c6f8f2390e2cf45404ede05913afdc9d88975a20373deaa40d0bf01. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAIRL2407210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde8489fc707a67cfcf73df12f7c1f3881dd9b4ef14328a85474c9f94e23ebbd. 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/CAIRL2306002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca18711b6c2e6c1090fd635959e3ea47e7f4aa6b877544cdc50951c106f529. 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/CAIRL2306005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e9d3deb1bdbf22b5a5e3e2f9247030a58367b68da904d1dd6c8e074f4be6be. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CAIRL2306001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe031ddb81406beb5ab3b014df6dc127873f5f4e54c08be71e3ac0c72b5350057. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CAIRL2306003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f05325f2151ea0d22c87802eac6d464e7d7166ab777fbc2b7d75e6cce4cf13. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CAIRL2306004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ea397cff4d9cb502b7a16ea7ae67e4b14fbc8b02d6bdae339bb665f3c4004. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAIRL2306006.