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 0x0d7e9077938fbd554a6632a912da3af790135151bc31c7a473482512ea59ef05. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bf34a9a-0032-4d2f-b3a8-69c34d9c7c55.json and https://artists.proofprofile.net/proofs/artist/2bf34a9a-0032-4d2f-b3a8-69c34d9c7c55.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 0xa17f2fd0592b3408a3778779c5f35044be6a45ac49db2758fb916b9b3a527ffd. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/QZDA72025691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54fd6f349884fb9fe2070a5bbf5406543ac0cdc9698723e6d95be31f8930941. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZDA42115495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd31852a6cb87c7d41479d34427f916c7f0e9239a5f7ec7658051eddb301625. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZDA62184844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01b2f939a858bcd8d274c59d321a713da99a46682b7ee43444120714b228972. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWQ2062541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8519a51cca2cf14be16f3a9cf1676b0113b61182165e0a60e8400f0966179e78. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN72286481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb7a884ad4cf357c4a7c7f286edb3b088ec962307f735e261152c3106dec24. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB32487422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8519a51cca2cf14be16f3a9cf1676b0113b61182165e0a60e8400f0966179e78. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHN72286481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9d6b28c2f7a8a9dc7c05b63cb510ffd6358ed72bf853c06ed3fd6337a76004. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB32487424.
Probably For Nothing : The Complete Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483bdb142d2fc83495b6323c64c0f71e4abcb5e55c592e6bba5305366f367aba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ782572490.