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 0x835583e77873360aecb14e679a2a1f797ee3d63f86727a143030185fabeb247c. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bab27e1-b0e3-4f63-b248-6270734e720f.json and https://artists.proofprofile.net/proofs/artist/1bab27e1-b0e3-4f63-b248-6270734e720f.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 0x611fa1e8fe1ff45e4594ffd89939be5a9113298e10a3794a89e1789e247e22dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CACWV2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391867d031a11d25cd9d3c5403c787273638f5a8c0d8829a3e3650a2719b4e2d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CACWV2300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bfaf5d1083e28ee5f2f11064989110364b6e730187cb39f6b6a6bfc3934d3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CACWV2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0983ed26323085d14875307d21498eb5c889b6ea8184caa9b3b00db33763ec. 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/CACWV2300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b641c9c8366c7a9da9655a4c0ed52d34919dac1c56f15b94fc61d9991d96ea9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CACWV2300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ccc8c8a8e17124fac75e466a5c1b96deeada4598a692066971093afba34767. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CACWV2300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc36aa7a2c496e0cce8b85e0e63f70083baa188039ce1e4c8c0af857e6874386. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CACWV2300315.
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 0x63eaa799655e1a2028d9c18b54f6680b0479423f9848d6e28ed7ad6c5e0952ea. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CACWV2300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8981098ac1d012775d9aa7db97d042561e1531c0e3669cc8e9778388c4c387ce. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CACWV2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93dcc69f270b111326667b8d3c0d4da0de44a19a387b6cd0c16d70c021fb2e1. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/CACWV2300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617752f627e7000507aa25772c25c5028686a9de9b059ab2b3183e2169aff83e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAGOO2147336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77342fe0643d5e3127bf9f086ccf0090dbf4d7d024b6b18dc5a87b3247611323. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAGOO2147338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746f98d7e30feeca1e291127c57d0928e2d5417aed98b2df5a3bdcc65e9934f8. 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/CAGOO2147345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27618de80107328fdc93dc73a955013477f44b80ea85616438b8aa93008c6a. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/CAGOO2147335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6e1425171d80da4289c105d018a2fe8655a7e32a0a3ad2ded6053ccd397ba. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAGOO2147337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2dfa0c36e5179b0e3c6b1bea3204ecb2c1a594e5c69cab11cfb9d4a15026. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/CAGOO2147339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca757f989cf47ec485de3b90f7b2654dc1b7643a8e5ec5dd3dccec51915f3c7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CAGOO2147340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86303770956555f2ff9b3683c46936af8b4903030d426e9537b84967f829e21. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CAGOO2147341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec738689336a31a93a2a6463184f2f2aa56a0a258fe7cea8129f39a7da39324. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CAGOO2147342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a3372464cbd917bf66d04f8be86ebec1cd31c99829dcfe0f36941d5437b39a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CAGOO2147343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01953cf388bea1c0c2b915aa2c76f71daa4e00fba40a0f0432e14191e220951a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CAGOO2147344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92def4bcfd90cc71cac3096321f130958e73eb637b8f63f41f667609c0427c49. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAGOO2147274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c56fc159cc273c5be86fa1bfbbd66c81a1b17e8fa22732097b1e4c7ca3b8b67. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAGOO2147272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777060314948532ba6ead201d8839adc8a4f3a2402b12802de01a6ba2fb27938. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAGOO2147273.