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 0xd619a89547b008ff2d1d7431b6dff9f93eb4146b13aab25f28444bc0837315cb. 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/41992855-c85b-4507-8d07-f903b82d80f7.json and https://artists.proofprofile.net/proofs/artist/41992855-c85b-4507-8d07-f903b82d80f7.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 0x3d8851fadf8ebc01c0059f91c4ad3432d9e7905b9282caad590488958bf940c4. 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/ARHXW2002169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553af76254bcab4d85f976760be1b6674116f9c472e1edb5f38357d11aa7423. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ARHXW2002171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae0358b2b2a7b711abaac8c111575dfe4877c4f98c177973827b754e3e81963. 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/ARHXW2002173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b82bda506e15a89166e7b29a38da8ef02e50dc5162c3777f8cfec94d857d33. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/ARHXW2002174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dda97933b98b9e4faba1e494af84ea8219927c1248654c296afcedc6d313a4. 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/ARHXW2002175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bfbe6ededfa19a49c56657bfe7388474a42affbcf6875163c5e878f4a9b6b3. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ARHXW2002176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cead31d2e3f108829e7fb4a4e037260f043439153a81c7fe0a055d783744def. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ARHXW2002177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dfb74fdc9212941fb5e531340116c67e8db9b99172713512e2bbda50a5ae4f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ARHXW2002178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e2c82100eea2fae7e6e6822e6adaccfef5533d3b5273163fd25add631dbc55. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ARHXW2002179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedce25fa64eb23a3c71c37e1052a98a88f2228dfe9e87358efea7c969c3ec80. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ARHXW2002180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab08467d56aa7985f2f91b7933937129f20e74ec35e799aa5be44ca4d469f3d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARHXW2002181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d4339b5fe491e1af917cb4cc9f9faf060558c3d5dde81c727a6e00892815be. 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/ARHXW2002300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc11f88a9634a9e140fc3e1210c597d8451fdde8c7e20f95d5e73313d86820. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARHXW2002306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a189c5e034de6a2db147d815ec0bcb21a65397c5db3da9b267644ddaae1f80. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ARHXW2002305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe2451302c622159ed39a799a3cf1e3572942aeba00d074dad07ed44f6875c4. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ARHXW2002307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59488f87a38ccde0c751151778ae8cb6fba38522769e5894d25a45d237dc26ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARE5A1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c27e4cf9ac7158febc4ff3731b839721dad4caef09c261dcee5a4d4f8a53ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP1847418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208b6ae00d9e41cde19ce0ee9bb9ef40e06baff3e3a5b3e455006b1cd4930485. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USANG1901982.