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 0x8c3b84f2fee8277cc17f8316b0b9bf30b4f216d6031326b0d5f47529df89726a. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bb0cd66-f051-4fb0-960e-7474f86c37d6.json and https://artists.proofprofile.net/proofs/artist/5bb0cd66-f051-4fb0-960e-7474f86c37d6.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 0x882862a5fe4ed7a5c8a5f9fe31bf0e3c530b10b7fda11f8159199216380c5df9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ7M2459393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf756d39d7b1bce72c844cfaab5f66b0fac52b316fc2454b01011b42ff416bbbe. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:48Z), 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/QZFYZ2520069.
Come un Masso in Tangenziale (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566826a0720b18803e29a53df1cd16bf439f8c30760e836b7fb6656b5eddb132. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZPLS2523168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c0e8ed6f32e4b21289bfdede71c811cd4e02626c2069f63b398ae644269573. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:16Z), 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/QZPLS2523169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81769ed4649204adc5bed10b192f1451a214c8e6b0dd2d711a558382735fc987. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLS2523170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc968f664593fcb7be02fdb9a37e993f116b65350cd1438666986fd3a7441ce6f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB22562318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f4207cebec140577c99319a6c1076735a6fb555b05bad2b89183e0fd345a67. 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/QZTB32501049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa56108eb5079372082caeb20c5a7d303dc864daf4ec66d33c87c4ccf46147. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTB52574552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf008417dcc9dce373106beac74144d67114086d444ed6254b864ffc1edac505a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:34Z), 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/QZTBB2507822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0cd12c5e7a8147e51d16c7f90d7e5b27c566fcba3410f12ebf61cfaf26c030. 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/QZWFN2510573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bedea8c420988268f028daec5d8c68f0e2427961114bdbf116b5895568c7ac6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:56:06Z), 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/QZWFN2510574.