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 0x75592d905d9044e46e47c548376b16b9e7b4a72b4ae5abb9fb3261af8b86ac8d. 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/99e1857c-1502-4bd5-a77a-05da9c2e9960.json and https://artists.proofprofile.net/proofs/artist/99e1857c-1502-4bd5-a77a-05da9c2e9960.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 0xce26879ab77f13a004cb6f6a912c90fd4ec66f9965cce33f8ea6b9fcc5838851. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZZOPM2231639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30865272d6fdfcb862b0ab70cebceb905c8bd4a611cc4c7aae8704f53c512338. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US39N2201458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e152452c125be62ca3b0158da49f235fbde3adfd040b44dfc93c613d1a74f44. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US39N2205181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b48cc74e4466e48a97d184bae34d614b97be98d57e76199acca10d81e6affb6. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/US39N2300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28b34f5e03426e96b19ab47bc3e2305a0fd3b8c2c55af7ed8215765cd6526d. 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/ITAA82300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5529d0ac3b041e6c178760cc4ff758ca269e0eeb8b353d8665c6a1b0f187ec. 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/US39N2304433.
CITYCAR (Abbronzatissima) [feat. Edoardo Vianello]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df65b2507d597fc4594af60fdfb7956d736e78de611b694c58dfe1084c5d916. 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/ITAA82300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186a23e60e2c40fc9f62310eb86d11835ac2881b8de739e2e5cb59c7bf51b835. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:24Z), 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/ITAA82300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5351ffe87be6eaf0696b78516c1798333a0df83f484263bedf23dc28c934ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITAA82300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767a7827a2358ac7eabc75bbf2b36ead8c1832004ff80a52cdb7169e82639d87. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITAA82400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e95f05a2b4cc8c8cfe4ce44fc18c090267a4e0b930faaa83eef75c37b0dd0fb. 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/ITAA82400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb0fcd42dbd54de22ec9f0c2e80458d345ef6317760cdc50ecb27b6464e3536. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ITAA82400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b10600d9b1cbd207125f41d3e6cdf475c98f45c36635619b0a138d00cd50953. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2431566.