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 0x27da9db52f393839e9c94c63d91d65c3c09d98e73d27e552a8e34c0f9cae05a3. 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/a1c5ac0c-50a7-4635-bd58-9da32d267628.json and https://artists.proofprofile.net/proofs/artist/a1c5ac0c-50a7-4635-bd58-9da32d267628.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 0x9dd2117b3c4e36bc53310c67494762266fd7fcb7734297e51bc2fb97abf90382. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FR2X42235895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f068e967c03d5cee0cb4b4b07a161c191f6a6ab36c74d96e3875c9e523f330d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FRX202214317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea0d92887e07cd4f058daf10912c19662f1d0b83bed70ffbf336de803e18acf. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:39:14Z), 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/DGA092212338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c701cbd2716a65d32d0211a4b0381200344b2256c0f19395574a07d232edde. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:46Z), 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/DGA092392749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72bdde2a9a552e3ef670959a0022359f16f452bce3f198ad669939bd632197. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/DGA092380304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d3204944ddc7b44d15731f8287072f68846ea373bd84127dfad8e9855e0f1f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DGA092380296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0470dec6bafb1db03291edf317b060bf126ee298455fb1091858803599a081. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA092380238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a275c3677318fd0e15145220be92eabff135487c5cf6811f4d09899fc5ee30a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA092392746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d68c8c42ed6d10bde177b613330510e5d8f7987e8f68cc6c40ab633e125185b. 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/DGA092397895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b0d6f3d9180a4c1044c6abc04a0d22a342a34a3651c46da5b177f7985a15eb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DGA092397894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab50db181bc198613daebacd17ec90b59c2064547306e7f14f3828804afc82d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:48Z), 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/QZYHM2366569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db903a014be7052e01b89d61d72f0cb9413f2bce9bde859186ce1859291b23. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DGA0H2352511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b8e9f9cd1b243afba81eac77deaab9c8b144a2036ef53ada5cf7155e1de722. 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/DGA0H2358792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a206da8b5c1a3f352150fe709f11af3743ccb2c5f15e3ecfa1c313d6124b05. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0L2322563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da73bd122c22620f25c9534fcfbd192cb981cbf851d74e04cf63bb1c815eace. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DGA0L2376728.