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 0x0945e21ca8501312ee6aaabcbff46d423c1384ce3f3326e41b011025b56dd83c. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2121776-112b-40f5-ae48-14dd19ffa626.json and https://artists.proofprofile.net/proofs/artist/e2121776-112b-40f5-ae48-14dd19ffa626.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 0x6527e65f9e3025184d1df7d7d1a8eec343cd8fdc6d3a545779f9021a9ee63fb8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PECT10801025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5111e42171178fbeaf39dad6db9c0df8cdb2deb4cc583c8f8410b7baa571177. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/PECT10801022.
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 0xba257b966dd710a67e6c96d83e21040f58bc79801298635b2f2d17487f2c369c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/PECT10801027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e8904eabf729dbfb6f0af0d2089e4f6ddfbe8896abaa85313fbc455e1c518. 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/PECT10401012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dfce85f74ed7b8d35871ee4eb3c78a44e807c02f9af7bfdb75b4810e17ddf4. 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/PECT10401013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b90c1fa855c37cf3920e2383d0b7ff27613fa449834dc6d8494f81cc79b60. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PECT10401014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4384c06e089d5555e32964f203b8f2dd6c016f25244055065ace3e7588859a. 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/PECT10401015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76d6b568a61eb5c0354f8520b3c5864a2e447b1663e6f716b383ce8f43c10f0. 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/PECT10401018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9986d35b7192ce91fa9aaefce321912662873e24b24f555f945613d065f07e6d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:07Z), 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/PECT10401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b18c83b77ee83652ae08345e24e361b2cb9343a96bef0c1de5a68360d968ba7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PECT10401016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f2248133728d5f5ce21163d8f5dc4c620a5ca29109f533ecea3902ece25c8b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/PECT10401017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3e56c718b789950867746e0e8093811445976131b2c5fa455959a68f8ebd18. 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/PECT10201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa00af04d442d6e0ad1c91e7c4b5e1322a06dafa0077da8ef809d652c815d0a7. 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/PECT10201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ab46c6c17ba2186a7d401412523424e928efa149e93f3ddd1e20e8bd3a85ae. 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/PECT10201005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb561503cf7fe2315028ef32396ce8ad26a4839c7ba2f8d8d6c3736ab660ba9e6. 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/PECT10201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fd4832eb0cd9e1fae0fa0347fc764214ac37402dbe5c1baa692468a6234578. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PECT10201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f58d011e756a94805a1f71fed4eadd90272bf0dede3a7f97a314bd465981e4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PECT10201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe653965437c16bd3bb5a03c04dc6d8746ef250745074698bfdf758c9be44fb56. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PECT10201008.
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