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 0xc3ecd475120c4d237e719c279d75cf80e9800ff28b84dcee9013ceda07edb32f. 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/42da4839-11a5-457a-a15a-0304cef62d31.json and https://artists.proofprofile.net/proofs/artist/42da4839-11a5-457a-a15a-0304cef62d31.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 0xcf2458b513caf1b20bf00e1c759c96ddf3c77bf041c7c9bcd16f59ec9a27a717. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM6N22487345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c38ac845497c74b5cfbc9a70b53985ec79fe64607f96c2953d0a128aa67fd0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6N22487347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be980fcc5a2d7f722afb73da80672098d32ff09224ee00d8643da5e3f2fb61. 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/QM6N22487351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc5c7520569f527e0573dbde7b2d092f017c17a4ebec04b40bb812eb185aa84. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6N22487352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80e8c247fbea00e295a154038fd1f1ab6c1ead0b8be46ac640a1d8d3f239571. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOJ2R2306060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b39150e8a898522538fb7dc4d1b95a66aabb0fd2bafe89cd2c5e57999a7d7e. 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/NOJ2R2306100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98749c66fe3b8f160548c1070e6f7d0028fb1aa92019155a29693912b050a33. 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/QM6N22286921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebfbd982a4b871dd5cbd7570f47a1de68a7e3d7b9c2cbc25c834e83cc533ffc. 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/QM6N22286928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69829842a38c6951b47776b323e31c667eca5a9c5fb14f1c9ed184199a67d0e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P42005582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0ff39e863492a12cf26b3dce3835e4e016018a0b145edbd0003e8aa703e57d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P42005583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9ca97677730311496e5e37302453f90a8f9b84737908467643b3702b69156. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P42005584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6d4cae19a945a163a8aaca0e9cf45a4bf5d886f32b4086011d5bf2fb6db28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42449301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353a840b1ec6b04547fe35e66eecdfb1ff9ac1515d66a20f8a0d7bf01286e32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P42449302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73e71d40fdfac8fbf1ffa26d3a0baa900ee66bb57f365cf84a767965b1056e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P42449303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b7b87c23353813460a1735417fd16d21f5fcc65911be72b1f500b268822d9. 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/QM6P42449304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6bc0220e6bddab7f5d005c1ba3e27a414c60bea0a0471b4a2d9aaf08566c17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6P42449305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d395d9b336dc3f52182ba33ffd399341fd2676688827852efac6d82bf75108e. 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/QZTB82393392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf474f51e612f29d58db8a62cc08aab158055ff50eae6969e93acc4036a319864. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB82393393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73d27b9426a429c6d8e02b0f25c4857cade8079bc60c56b1568ee626a5f3498. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB82393395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610f455bfdede4e296d7fa0a6dcbebdb86c307e2f12766dcd15865e6bb9118e0. 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/QZMER2367235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9407c25a20a35e8ab1057ba1082b67e904fb8721c67bdfb4dbb54213c310dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMER2367236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898523c3cac46c1a453bcb471f86277868ff729aae02774c7417f99a95d3dc9f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMER2367237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2114b189f743eb2290abfb2952e0033fe864d82634171e1d5fc215ad43fb53ec. 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/QZMER2367238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6303538f01ea3c67460b134f2d19bade8b0b449f1c98b819b38500742f551d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:46Z), 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/QZMER2367239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee691572a37a45fbe837c0d1a5639d05ee26e875d5dce8d53082607bc8d80d. 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/QZMER2367240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f23c3b3fc2ce439f869f12a447380f4136f6f0daf50ef295311491d9b19e135. 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/QZMER2367242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8809d4b98b923ae6f43d05c78a310303041460099cb863596c263e67a2672ac6. 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/QZMER2367243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81622c4f15607ea64dbb1db3c49c212420e9fff67ef8cad492cf0809fcca1777. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOJ2R2012020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf60f0dc672d188324284f73103f22290067d38b94f13958c27342ec1c6b288. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOJ2R2012050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb234c49a4fdf9ade9bc50ebd33174d33aced92d1ed9421c2ca0ab11073db3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOJ2R2012010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9947c2ef1a784994db061a633c2db7a2e0badc4ca270161fd251eecd32c0ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOJ2R2012080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a61b4eb4bfdc339898f9ed2633560a642cc6843e58b385e3545f57cd7f8e6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:24:47Z), 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/NOJ2R2012030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc5187b3b20e1f3fa3c2064d96ba907d096caf79578b63d52fcf820fae637d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOJ2R2012130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2787eaae8da2f817f3c86f9796a8a2277e6b9495a692fa08f7ba7e0a412000. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOJ2R2012150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c4630d4bd301ec5403f0c504c3b627651ec37babc9621c077c81c0d1cb9d1. 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/QZQAY2432846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c916b491c2777dd3ca843493d47ca1776390308e8231294d5b7a7dbf4caee88. 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/QZQAY2466340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f28f2b88a29890c32fd3884789f98109fba9ff7e7e3ebc480458f350ca51a84. 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/QZQAY2484812.