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 0xe1fe3319e5a08b09654f29facbf824100c892cebadbd8bc9dc4a16b106a98f51. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d384d642-1088-475c-ad43-c057cb9f9f84.json and https://artists.proofprofile.net/proofs/artist/d384d642-1088-475c-ad43-c057cb9f9f84.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 0x01df10aaf5ad0d7c6c185f8c7118e84fcb97230dfb4021c80979a922e707b3d2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES72322807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb00d651648c50b8875a5cb23df914e9e6527adfb7edca626caf69ac4e3dfb8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72322808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532d9be0b1913f6fb5cb73c0e0b0c46d74fa3ea641985314fe4850a825b69c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72322809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54bbd9e92144c0b9b46202627dee7ed6ef9ebbcb0869a6ccb9a10d97c443583. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES72322810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e194447fce8b2f3057fe2562cb83dcbd66868ba5f1dc19941d01c0c9270059. 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/QZES72322811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cbf4ef6d8cbaef9836489c3776b9cdf19a2358bcb672442f85c9164288227f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZES72322812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f942521dac5cd65390ccc96cd8eb398f4a21d2225e79ada58c0a092c3b18bbb. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZES72322813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87280252fcbe380293351badfbc74abb41d157e93b528be6be59ee61080db1e0. 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/QZMEM2344004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1453af47f468bf1bb358a5a39a77c03dc31315d8633e006e9edc829d37e81ed. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZMEM2344005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f229634efbfa2c0cbfd386dfed6a9aa660695105ee1cb9a0a9f7d0ff32951c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEM2344006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc913ba4c4747a924f68a1308e199badbf9e605f94eff610a05c824bc616a01d8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZMEM2344007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb90caaec6070ca54f0210eb61e537ecd154a8289e13ee78d602cd739039996. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEM2344008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944978fc7beb2c74e4b19ee03990adfc31b6caf832e4f8324d40d7757ed0b7e9. 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/QZMEM2344009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e4f527c90425091b220826bc2308c5bac2d6289ebeb57f99b1f086f8c8fce0. 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/QZMEM2344010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70b75398ebb4d8ff73b27b3f8fb22cb3d9585938d63d6316960195d13052fb. 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/QZMEM2344011.