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 0x457acc673720ea8358f11a070f5f740b71d091e00e13bbdfdb0e6c285d600f81. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7a4cbce-6dbc-4401-86db-301a8e0fc8a2.json and https://artists.proofprofile.net/proofs/artist/f7a4cbce-6dbc-4401-86db-301a8e0fc8a2.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 0x28cc48ae80965a4fd90f02152cea3c51cae30d143d6a680f498e76ecee307cb5. 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/TCABD1281954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea788deadc66d7ecd83792fe94745b482f7626c53f9f05f4aa69fd2c3e3d1592. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCABD1281956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f1cbe24187c8b7d03ececae76255547a1434f38a35bf5b07aae77ae67e944. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCABD1281959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef34992f1551a50b3353370cce422bc41c7b53b23f38dc5474482e608cd8c32. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCABD1281974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac28f1cc4ab8be2641c6125077da7b90232604659f4f5574dd26246c9fab470. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:17:12Z), 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/TCABZ1458161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7268a4d1c273067db1743c98a801546d3919628ae74f03e7a0911d1cd9967. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCABZ1458162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1233203ad99e0f1b29a2aa85bf138a6b0500256cca9393c0ad14c80c7fdefdd0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCABZ1458163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58182b4d505975458fc52f73ace3499df02b324798861083e546c980a30c5f16. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCABZ1458164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc164a54cd3f474b4684c8a6bec00ac39b439a5d98679c65abd7120b52591dc4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCABZ1458170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb3c557a7bb1127276b8b4f0ded3635ea16179e625a746d8bc9d28aff1b5482. 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/TCABZ1458171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaed4d4950cf7bce8b2aa04be48857109f3773e104a5094be33232eb98baa95. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCADT1806137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9b227041ba7896d43521b624ca8e56ead9b09f98b781255eec4c6a5d2b7e45. 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/TCADT1806149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041dc8e2b2e23435acbf87ef8bd2f41efb98926c48ba1d7efa26230af7dc5d04. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:21Z), 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/TCADT1806154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80310c5ba491d75a16156fa9cfe762baca961094a2ba7f8109878f7e570b8b. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAHK2369760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f1aab701cee8097e2e02c33e0e90945896c0ebae70102b06d0495e6274883f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIA2403915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e99b99ac70f3fd2a1e6dd67a7155dd1e4976dff366ef11e12e7b32ec1cb4d6e. 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/TCAJM2560371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d131f83f197238365745ab70de20fce13c1d2811ff16dfaa7b199a8cda0555. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJM2584079.