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 0xc94d7f75d6c77634378ad35f047e6abc22ccc397b14d2ed977371a915c5e3cc0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cdaadcd-f6ec-459a-ad37-598a6f331d53.json and https://artists.proofprofile.net/proofs/artist/8cdaadcd-f6ec-459a-ad37-598a6f331d53.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 0x34095854625c8590824850c0986130c212a9fba8a6e99d0557f52dbd68ab0d97. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRU2V0800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88de826a0817a099f24d952f0ce3601792b3843086dd801885fd30e37f1bf3c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRU2V0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1916093ae1c97c90b1cf176f71382ff9192b464f3d841dd7d34ba4652ba5fa. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRU2V0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ecc451970baf93aea1cc475d460c64f79f2f288d842674aaad61242122669. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRU2V0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea9acd04df81f3f32d2ce0ddb34588d50ca527906b6bfbc223dab8e7ce30ba5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRU2V0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6df87bc7c74cea6d54fb7777dc362ab0d6699bb5139d081b1f067c270c056c6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BK5SD2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca0407eb19cf8e90687e67f8979ba75410846764d89157d38c3919735c0f5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK5SD2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5343b0a2d4dabb15030e378254445901ae5f271a344e5dd5aaba0388809e8d7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BK5SD2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80122d9cfeb72dccacbd08bf580319088627ddbe5de79efe9e0ede774183e84f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/BR61R2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1f05f42e9fc265e909733cb584363e2fca4b4f1a156fff85d915b9b7cb0af9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BK5SD2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4a7d9b29c072633bb98aa5c25a41868856007e2e7b334128b66b891975801c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BK5SD2400018.