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 0xb21ce4faf34e80916e47d64decce36513d1da4f9c73e9827c2e0f7c056a1ae08. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bb25af9-9028-49a1-8aed-51a224c9e51c.json and https://artists.proofprofile.net/proofs/artist/1bb25af9-9028-49a1-8aed-51a224c9e51c.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 0x58d5c017d9d2cd16ec1b7fe26fea16093d04e86404ec0a5c551cb197b0263670. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1935840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47d0398108a2e15a7ba5934fa88c164c632b5fdc82e7f21ee23cefded911ad. 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/USHM21944344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ff41c3d653cb85547bcb6981cf49f26165f8246ed6f907d6f20caadaabf96. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USHM21944345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5a9c4e90e2a88b51c83a46788ea2de515c67c92929bb5b7228cf5643ea6a99. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:04Z), 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/USHM21944346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ff0b75f64d2068660d247677622a8bbd796f54346ec11d7c835d28cfd42332. 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/USHM92101826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e93cd97286a5833e36dce23d34c446f5d7a972afd8ca0a1b6ccbf3a3a20da67. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM92101827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361df68ba96afd02d136381225c49398adce70b96904c9faa19325a644b63bc7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USHM92101828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6653fda6730d5a774d6bb1238b8792cdf9b6467c8a3af71b2c9bd80ef382e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USHM92101832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a2d48a2487a3ae5f6529ce91fac3db59c4fbf8c1c05f235079e397c3bd981b. 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/USHM92101833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70e2bf00bf7ce34f44c80172d6d95f29e471d2f0387af7c5d5fab7d686d2321. 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/USHM92101835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af7934e5d04de4ecc9c6454cc91c6e8d6106be27d0db371bd8b5e9de35c6843. 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/USDY42264612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a492cf0d47890e85874a3af6a83aacec65fbcae0190a0634b5d492624529bc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:33Z), 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/USDY42264614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2605cbbd7639c281be9ac361c2058d21c6f1310ebf78cb5ef09885b0de16350. 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/USHM21944338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd54338b47c8b27d731eb8b6ffe1b33c8b1870742e6a11a1b5d5c2ef243211e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92237134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246cf8ba1068852b5fb4412bc6e3b53662a55d72b6899756b4a42a7cdc21b536. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USL4Q2221109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d2a6efadd6c04037d9add0f4b599b14668e3d8c026138896b85427155933f7. 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/USL4Q2221112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9f0253bacaea4a5d3a98be9e32dd0a621fdc551289e738ed8cbde469d80db. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USCGH2336380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2f8afc3fd64ac1d2528554f4b12eead0ee61f51914bab19ad98853acbee0b. 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/QMNS92359251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2448e3549b608614b2414e22055b98bae19a920c33ba7689334d42075349e6b. 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/QMNS92359252.