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 0x1591ca0318bb642c577659b185afefed39695d9998497b9668228ecb03d36820. 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/decf0184-d05a-442e-93a6-e98138ff55f0.json and https://artists.proofprofile.net/proofs/artist/decf0184-d05a-442e-93a6-e98138ff55f0.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 0x2e356834258b5e230e4487748b07c6f4974120718060b08603efd7f7d4931bdb. 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/GBUQQ1039903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d0bb4c9a49d84b5da387b8ea7ac397cef1e63006ad19797e9f4f44e26f247e. 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/GBUQQ1039905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e021f93ea4c785000dfe8438b22197763ae8a26d2f1f9b64220817622ce429. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBUQQ1039906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2530c295000aac62ccd7a1e267c260153f8f9a82eeed9d8360a28f3bcf2de6d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBUQQ1039907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d6d2f80ccca47c92793e2ede09ec43eef7ad23096d40701b7612df48b1032. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:42Z), 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/GBUQQ1039908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8d90522b193551093246c9b7b9f169b9b6b14330c89762a7d24b751c78ae86. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:02:20Z), 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/GBUQQ1039909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b540d6cfd53adbe49ef0ce4c4fa42e53f47d73796a828ef9665ff49d5c36297. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBUQQ1039910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07029093e400d89e6320dbe4234fdb6328f3f1522ea4175951dd5d4d62fd9fe3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBUQQ1039911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb5ab3a1050fa3b754668a0ceba427f9a41b66ec140116ffd43599506630fd. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:21Z), 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/GBUQQ1039912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428944b4455e7e0483d2624745657d250006734a21f5f98e3306431412473e3c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:33Z), 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/GBUQQ1039913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9754d0f9b53aa06f47c29d296265553733d2b28d79e8701a313b0b51e4b62f9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBUQQ1039916.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62958232f818d2a04cbb3ead22d35bada8c9aaff1463f732cc15c42fd7b68ced. 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/GBUQQ1039917.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293da9dacbe98eb9144627ae718ce68d30afbb912d3381559ebf408fcb7c45e2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBUQQ1039918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa055b025593bca47f98de4545e476b563bc98d1a8a0184c0e8fe003d41cf25fe. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:45:28Z), 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/GBUQQ1039920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6663b2b302edea0d9084d37b3d080e77c0c7a99d1e33099ec7ffdf1860836ac. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:21:25Z), 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/GBUQQ1039921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04c723b11b5fadd053f1b37a3ad710c001d577ca78de62461574b9bfc5d1b52. 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/GBUQQ1039922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21b9aa8e36b11e8a229294d6355d00b9f5b1d09a5bb81309e5d10f388e22630. 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/GBUQQ1039923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5d6334f809db436ea0db8e491babaadde02d7f9d6c4a5d9e027f61b3a8c94d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:59:38Z), 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/GBUQQ1039924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbae08712450721616da56ce45692e1bfd00651b70397a596202cc1ea1f62e6c. 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/GBUQQ1039925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9cd95d41bef89ec30487a815071655c566880a2272fb653feec0b4bfd3d993. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBUQQ1039926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49bc2fa1e4306df941a74ec9f06d086fe27712426240e595bc574efaec1928. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:30:15Z), 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/GBUQQ1039927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e69207f8edbb8162b3ee2c1dde95a8adf2741794bfcec050e08ed97925eb5. 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/GBUQQ1039928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf5b733205ba1d839885be33510ee4bffb533b049239e8f75076727a0d7e8df. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBUQQ1039930.