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 0xc75a805fb26684446d78b217d47c250d06549316e9ce7a59eb17c46a8c3d13d1. 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/682d7ac5-9290-46f5-87de-0a64eedd76fb.json and https://artists.proofprofile.net/proofs/artist/682d7ac5-9290-46f5-87de-0a64eedd76fb.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 0x0dc8346ddbabfefc01d258ae47696a9282e834eb47063aacc9a0c47ee167a3b3. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/SE6XY2129670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42caa664fcc13ffa6cbc3a843019b1b5ecb759d973cc7993b903c955aacf492. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE5752151806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42caa664fcc13ffa6cbc3a843019b1b5ecb759d973cc7993b903c955aacf492. 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/SE5752151806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b963d4baa5ccad9ad45f011e9c0beae2a6838a61ec38491cc465b3466271d59. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE6I32252202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc938ca753b402329582b74b831402412d73d42f8c1156daa81f3906d7c921576. 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/SE6XW2287585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a633dcc34ad3261dd1eae6e53b1b290b1664850207b364cd80ae7da891c04e9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/SE5BU2379145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1fce89466a45560ac61a1c324e08eb90d1b5a8bbda45f0a9c78e66db5f7cdb. 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/SE62M2340461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3549a137131e296acf5733a4f2209af074d7c293068c1055790ff05b2a27a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:42:18Z), 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/SE66N2322141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e4cc14d1684cf34090a795c4fdd9c05a1aa205477fd0db63a579160e01a2b1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SE66N2332606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8142999b3e90e147a39852bcbcabd42f8089fc3073a38f304e3bb70750bfff13. 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/SE6XX2330729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d44c8cb53c97a5009382b37902a44f7b0ff504dc077732ca79687ae20d7b380. 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/SE6HN2428595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822e89115660362c25c514f27944f7159368d04aa7d57c896b4e66e7b2fc5cce. 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/SE6I32459102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46053cdf8b3774f272d6226fc535695a09f3fe1d023cc236f55c148a75baa63. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:34:53Z), 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/SE6SA2438621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83775d567a19132d1245eb33f49c9b68736cd450032b618c43237691eb05e90f. 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/SE6XW2420690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97a3e662b3dbcfb55d4c0000d18a908276fe3f86ac89d830c57d22d02a1ec15. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:18Z), 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/SE6XY2593776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca7361f2ab40ab02539fa9b1f65836106ad0dd4c9557a790f90266ddcdff30. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/SE6SA2515318.