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 0x948e791db1995a1ff9adbdb5ae6cf187cfa15b66b4dc3e46ee2a0aa40d093cf5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9582314-1e1f-4059-9e0c-b5db10c456ba.json and https://artists.proofprofile.net/proofs/artist/f9582314-1e1f-4059-9e0c-b5db10c456ba.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 0x398a73fee089d8d472b7cfb93d828112c3d0d207030d74f9c5093b1af3346e80. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZN882219622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3e5407fca32a3dbd395893afc985f264842a9a5111eaeff2896f53cf8c771. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZN882219623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bbf428d76d10c9f656f628910fea5e20a07ffb68b5dde8a255f6712d10aca1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:06:46Z), 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/QZN882219624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c3c41b8f0352f4726de61403710f076660819addc8e63942e7967d7b342230. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZN882219625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c3c51e78fcc0a3923fafe6c58d2c92b02cf0a057d4f32c8648837b848fa48. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZN882219627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc4a1d69eb8105ba5489f13a32d1ea834d5a3749742fa3fc1978467785d35aa. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:03:12Z), 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/QZN882219629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee9630d6c4127f978c23fdbc25eefd6b265e30648e4b5fe34d7ca2ad9635a06. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZN882219630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b5f27c56abe03af751173a1af1dc2d6583ea097da45014ef42ed52a1911de. 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/QZN882219631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80569ae4dca26a917ee75bde0b06f8b0770ade5961806592fb636e801e89bb64. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX8LD2270653.