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 0x18e03de21df6b0f69aee20426d61ded3651baca84da2afecb22669deeee4d2a9. 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/ebaac5c8-70ba-423c-9996-da1849d89ecf.json and https://artists.proofprofile.net/proofs/artist/ebaac5c8-70ba-423c-9996-da1849d89ecf.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 0x0c631ce91e02bca70296ffa54739677a22fc525ed1951d91817e2d02dacbd579. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES75E2202882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b5b6071a92bad1dd4293a6d7a803d0daf3759caf05949fb7799ba778d3008f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES75E2201647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657b5e439fe4e5332ee3293d980a634757b3a5d03c910ea6eed88946c43374d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES75E2202887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ebc4d3807f4799e3b6ef4f2d9beb4cb6a5acab108be6aa82e9fe49b2add5f0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES75E2202884.
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 0xe2037b186ec0567ba69c808e805d1bfdcda63dc5c9a5bce3cac40f5f3f92f9e9. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ES75E2202455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3013d1e14bf5c947a1bf3b49f9a55c89e4b62c51b9a93eef88c2b59de998512e. 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/ES75E2504743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49679c042619cce5cb07fb2c3ba857a36814607dd50024ffb1f8395be145cb7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES75E2505527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4244e04d7d5d29804082b4d4c958d4dc60f81be1e3472a013aba7addd314a892. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES75E2501196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b22eff793bfe6350d714c09ac0505c4d97ef2e1467cd295be159e4d57495244. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES75E2505015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16ca5c90f9c20350c2c8cce7483237cb5d06c61a24b127988d8916cbdfb9e79. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES75E2504165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee43fd84d5abeeef37d3a778400100f9256323d1067ecf28b73bb9b09b5b9ff5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES75E2502526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9b3e848bc517e1dea078f609c90f51fc8d652f7d422024f4fdd6c98dd5982f. 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/ES75E2505528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ec6dd0e78694b33c01f6b3ce0fbd0a20d5b11e2049b0fa51181280ee31b0e. 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/ES75E2505529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cdb5f373fb378269c20eff27be1ec082808a1cb5461a70f0608615961f5291. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES75E2505530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf79f5114a8f99b96612f3f2abf86e5a540dc3392275604279cfa6522cf6f1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES75E2505531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7658214bd13bb444e4bda79ce3afb10c41c94522e301fc2f863b7f947097c23. 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/QM4TX2358969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5a3e4fcf0ce79a7c88b39e6af02a446ae6d2654a8691d44ac6e462038a038f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2308721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a0b535f068885e749068f3c6db1a0607323bb8554c9d997a5fe159768450f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRS182127023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db7ccfd4945b9448063c7bac6117b74736ef4af3d59395e3685354f3aeabd98. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ32235259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ca4ddb1567f5d0f0be688d8a179d16c80a2b18c8700373775b7f0cd1fd0e0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES75E2300656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c25932b866852781e4457c5f1e8453eaa2fa195dbc9b8547092c536960220ba. 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/ES47E2005215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36524094d67064819c6b0da2d83943bac6388bb2e320cc46466bbbb73a6d0ee2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES75E2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e6b72612da08a9dcca5e40705f97945e5d0cc15a5034eb22d285d34821ea36. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QM6N22382453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1033ec04c0a4177126bcf2433eda24126837da8a38a350f50022f3b7abe6bf2e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES47E2009173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48709486cdba19797eccaf99cb977932423b94dd34b9917c60d0cffd158deae. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHZ62242467.