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 0x7e8fc428aa1390eb97f97c1755733800d6b7960c4849ff214595cd8ba8c90a0e. 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/ffb90986-c66b-4a64-95e3-1e451438aa95.json and https://artists.proofprofile.net/proofs/artist/ffb90986-c66b-4a64-95e3-1e451438aa95.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 0xc837fb95a097b72235dd061ac8afb0cc3cf8beec630efffcea18b21f91fbc6bc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPJ32382222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fddcd1a4951ae8959af43c351795d3b87bc7a69d72463351648eb842cf5a8a9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPJ32390843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182056a1d08df037768513336abb2338db15b974ace8d707b2b16be94d08793b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GXBDS2459036.
Even though i loved you, You know i had to leave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5f0f7b63d98ac17899d7cbbcae469845723533169ef917aa6aa8ccfeb6cc1f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX5MY2459159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23cbca728308e7986b18e2ad1ac3983a45b4ab8fcf0b5ddfa2482b092239104. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/GX5MY2447247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05a4dda6c0a7fdd8c411bea1ac301b927ace410d2cfdc31e362cf9d1884ff43. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPJ32406133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cd944df59fdd8d0314f8f3fb02852e2d4c50fce3641434f8b46afe3b539e49. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPJ32410168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ae64fbe12e0e5a8d70a87331d94795ddd0a717f16c4735fe284bfc10d1dfe. 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/AUBEC2494312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb243196ba6118f844eeafe01c002d0aa5a09f7f7029f6ef646063dca0be76a2f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AUBEC2363759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cf5cd4be1c561a29a8ab99cf3391bea51f0429f961498bc03f90269054009a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXF972483412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3fb40bd47d010176e44e09ea6bd1df9b61f2d122484d32db19e50975fde424. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GXFHP2404197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22994567976ce14e967f284f2a41d71d4ae3141556d0e6b8b993d713a92eca4. 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/GXFHP2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7dcfc92805f51ddba1fb32f707be13f184b11eac6504841461c5bd485590a0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUBEC2549398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2cab5132772d5f6daa2fa43e8acfb802bcd8d4ccc6e9a6c7d4fe6cb893296. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/AUBEC2549400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5dbdeef222cfb35854ee9e1d3dcbbf5b896f98a75d7874fe7be5924feee405. 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/AUBEC2563406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f65e7125e548bd61cabdac40910fed999fc07a78501dc65cde8117993d6a0a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/AUBEC2574952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bae8805faf2d8a23dd6c28917535099bfa6aabb0d91dd4c2e5d4fe27b38c62. 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/AUBEC2575531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d1d326118f6ce38179b946d56476ea8c042d8145b943056e6b03d1caee6301. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPJ32462921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf801f62dafc9e34e583551180f55733f8bc9d2cd8cc68a1ce9642f9f592d09a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPJ32462922.