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 0x8973fdc4be76ee0b0cc56cbd1a97f6c0d190f559a110ed72fb3b0a7ebedc6518. 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/dcfef8b4-eccf-460d-ae8a-9112b3232e48.json and https://artists.proofprofile.net/proofs/artist/dcfef8b4-eccf-460d-ae8a-9112b3232e48.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 0x05bfd46905e6cd12b6018963e5557027ea3b01f4fa020c90ecbf99f73e2b054b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SGB502599185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05083aa50c9865bf8a667508647f51f8b8f61ba3162d4db9ec57c9866dae4eb9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SGB502551396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6175c68e66cc020e30b71a4ade26823ae815d3f10b3eca74881224d40a9842e. 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/GX89G2549999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8038404cccae65dd0e673509ca32fe190b9883fb8d3221e4449b100d89b62f7d. 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/GX89G2589631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ea34d05b55b4e10fa025002904b9734eabfba543d985fa7df5ad634b8534b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX8LE2582728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d3127b76b44a5d3b8939331e6fd464b63cc4190868a10a717705b032a84901. 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/GX8LE2509852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abc07ca663999670795fa115bec9e50db99c26e0a89ac508c36a6c79baea78a. 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/GX8LE2559162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be6b8f2cc8283b7eab6e87242da16ead26f56e6b2926c1615aae38c489fe6f. 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/GXESV2588651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830cbfb7eebc9fa7e8989d5bc65a028f57f5e26b9e777f247cb0fc5fcf7fff94. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXESV2518806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eedfc235a3bf7c1e005474303252c2e3f0610441c0f2ba4e470fabf2ac28cef. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GXESV2518243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52c1c90cb57f63824f6165eb1d5e86d24c7da3e8ae59b7566e643fd37c30fea. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GXESV2521152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eb3b4493c5e061420388e03bbe386621a81950d5295d8232fe416647835493. 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/GXBDT2535332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c900edc54614dfccd46c2f09dabe82e9372d39a71d3f70febb3cd63a873df0b. 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/GXBDT2583576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81022c2ecee43d6526f93b269805306b10bc47cbc3f92dc185fe5271b36d3bcc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXESV2562035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbfc71f67ddb480334c0d030d74589f6c870b381a8d7e3a9cf77b66a306c040. 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/GXESV2555991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac097a41dc8d3b57ae8a8004dfc523cd6d5139cefa11a095d22fb4322359326. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GXF972570773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398299f0e20eed0dfe9191ad82c0a59a77d1c46c423049f0b58cf38703401e41. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GXF972583760.