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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a138d930b9df68bebb63e8a502627ba4bd689173f2363a029c0a536a1f4de9d. 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/f4c83b8d-54e4-4dbe-9318-9b8d636ac1bf.json and https://artists.proofprofile.net/proofs/artist/f4c83b8d-54e4-4dbe-9318-9b8d636ac1bf.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87130a16f2570a2224344ce050737990e7b7a0d5054bce48fc211b63191b1590. 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/DESA21300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36dcbdc8dbe987e4c848d1b1accf7b819dd8fe46312911c22d670607b59bdba. 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/DESA21300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77755a5b4860cf46ded2e9c17e1b1a4ec12e97392058ba33e31b616784277f46. 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/DESA21300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb529d3fe1f4226854e2ed89714598b5a8a9daa8aaae7b9dacf18335be90d19b0. 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/DESA21300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a13c296b1215b6ee3da1ee8eec3c2bf511f1223a8b9e99b1842342ecc5e1cba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DESA21300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed53af17228b82ca4451d69ac359176d1c8d37cca089f96c4c40d5889f9ad54. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DESA21300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7214678d99a748cda8fc48772ed6634eecff38c23a26d04468fbac309f3304. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DESA21300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8461e4103f17513daffe5eb11d287b12feee581f65787242ab9da52b711b1b4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DESA21300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a344c824c0d269811c19ece53dceb51daf7d2efd1269fb598679ff64540b50. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:20Z), 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/DESA21300437.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a04504f162feac7d0644353003d91f1af59acd7196db940675a216e0282c37. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:05:49Z), 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/DESA21300446.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea57610e7c586c52ac4e06345996df18fa66fa19c54456a955c3faed7698110. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/DESA21300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3439fa25099b12f3005efbf05d1aef151eeb14dba679587d60c5cadb1798df22. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:18Z), 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/DEXD11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bae89492f5c195b7cdf5821f0d008c51a4f916437ef066bf698d6cd8ec7fe40. 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/DEXD11800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1476d6fc04a94396915fcfab192f8ec0f617f3428bc2c753fa51826f3e1a3e1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:10Z), 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/DEXD11800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b4ae1a296fc926c98280bd47defebc14f73942cc3c5c31a3cd428ffbfc87ae. 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/DEXD11800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32155c53bfe4a624f253ddfcb3e4434f42eab73bf1801374955b23f770350f50. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEXD11800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482c47895c80cac98fea31adcfd4dbcd4f50c3ff6bb7a4db7cc89ad59fb49621. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEXD11800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d7e98e1d1915fe7dd2c4b371d3f8553c0cd6b98d0c3888d3da31cedec2b5e5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMBZ92490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f7f95763e942041344e5ed700af7cd12ae1432bae0f0ab682312069ac55c6. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:17Z), 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/QMBZ92490047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73d64f481761e4f118c8116a47c24ee29df342d0e8a58c37143af5434866771. 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/QM6P42468920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118e5a4cb8a9fb64fe889102a25b2f50af617c1829eef35415f538b895122d6f. 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/DEXD11800014.