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 0x1c40aaad197c797f7bc98a61f8926b262b00c6623e4ffec03fffe6bc03c2394b. 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/cf093ddf-c1ae-4cae-b9ab-60778b07fc87.json and https://artists.proofprofile.net/proofs/artist/cf093ddf-c1ae-4cae-b9ab-60778b07fc87.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 0xf5cb63d6d9f05c876a02c8991d41b2f211a2a3f3dcdc2e0f8613ee00dd41751e. 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/QZFYY2302249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c22cbc62e8de934dc45f328b0a4b21276b58e01e0e01c61711e7d75c84493e. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZDA72359706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8e06e5c5c5455c6e3f4a118294fea874cd6d924c8781c00936759042d48b6e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:45:14Z), 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/QZHNB2385805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea549ade5bb3d18ab9d05f661579030276cd7ce55835b4d3337b568a9c9262a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZPLS2391611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f3dd50bcfba3a32c8f502b9d2acfda189d3125c915b01bca361b465cb668e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:17:02Z), 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/QZTAS2376215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040ba4e31caa13776248292c721088be8f9aad0522702827dddb3991d904ae51. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:36:57Z), 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/QZTAS2376217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a56b5bf7083335a31d9d06d537734fc09a880ac4307c6238bacf2eafbc556e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAS2376218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c228d0b81be6157124c4798148a7d01fd2bc8fe72be33cce623806c5b532adc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:28Z), 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/QZTAS2393542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a318ac865b413d43e9aee1653059a3470e3e131614fb8e8d777bf991efe139. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:20Z), 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/QZTAS2393548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bb428cdd83c483ca2feb9ef67edfa88e208f76223bed9e51a0537648349bbc. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:10Z), 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/QZTAS2393554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400939a80113ac93e454ae6856080970a8a442072f1697dfcf7e344e88594aca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBD2393107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cfbe205cee953965d30a5cdaea81b3d3b20cfeacd4fda0a117063d88c8cf22. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:36:38Z), 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/QZMER2448898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0720fae4ebe7ca9b27b77a917bb41cc20d08e27ed32bf16683d78ab0bec6684. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWT2432689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeeb9ec889421c68f8f278150c7c1b5721f6ebb113923d3e27c9e645954ad2a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZFZ62513305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3696ead2918fe3ebe4029fbe728b3d48f4a571ee3cba8b6743da3c007243ac. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:35Z), 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/QZFZ62513306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8ebe9d10aac1e36b38a3c7f708b8cf1aa8e30893cba536515cb9ca5a86ecb. 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/QZFZ62513307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443af4ade07469f42fb18fcfc78d5b1da891ef0ff23bcba3c06f79409a793fc6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:05Z), 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/QZFZ62513309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a24df933f20c152d85c3c9528c55a2b526e32af0d4e0c58d6a340377d449fb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ62513311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b6712812cf2699334ccb99a3b08089e9e67748b2fce4bd7a57053402139044. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZFZ62513312.