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 0x1f20ed46adea0ff86593b8bc01d2ede34af109000bb94c3342f5e096cac758ba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d428e69e-e78d-40f7-a7f1-ece527e17a54.json and https://artists.proofprofile.net/proofs/artist/d428e69e-e78d-40f7-a7f1-ece527e17a54.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 0xcb8bd5c3e9bf6478f4802aab472e980a9f8630f4a0cc16c8fd04507f60faef32. 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/QZTAW2249847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bd5c3e9bf6478f4802aab472e980a9f8630f4a0cc16c8fd04507f60faef32. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAW2249847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c9119389526f9e8f62c903c12f1969978dbba50d9060f47b5cdd5cf156b87. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTAW2249850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb28235fa41f38d0cb5808fc1525b7f731703ae6d21a953708e6186cf2831e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6F2382974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadf927c892143a2a8d92860f92d10bee94a3324417846b5094f29311c411f56. 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/QZFZ32446552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadf927c892143a2a8d92860f92d10bee94a3324417846b5094f29311c411f56. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZFZ32446552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d783f2e6332cc4bf9893c9bd40b38ba1c380cf4d15eac813d5b95e3ba5acd. 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/QZES72435241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a77ff16f6320f2ac46269bda3b4ab76910f1f8f07f3fc3ad8e3c3ca0d1d0ce5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6L2487592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a77ff16f6320f2ac46269bda3b4ab76910f1f8f07f3fc3ad8e3c3ca0d1d0ce5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6L2487592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6218f62adceb0c4045824848025a4ce148d3d4680925645d4255f8317fdcc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB52436538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa69c3b9dcc9cd1c2848149960cb112d552682b552b61f0ccbcc50cb2242428b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ772459078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa69c3b9dcc9cd1c2848149960cb112d552682b552b61f0ccbcc50cb2242428b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZZ772459078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce68c1de1e5a4300d5f7b28e932984859c84968ec96be8b605a8e7e54a2179. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ22541382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccb355dc755c62687406154db592f546da84342262efe5eb4909af4216c710e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZES82507434.