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 0x4d909fa11f6038e8b4ce86470533d92db45e0ca984df0ee52c26139e4c230f8d. 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/01e4a4cb-76ec-49d3-9233-28112d6ccf44.json and https://artists.proofprofile.net/proofs/artist/01e4a4cb-76ec-49d3-9233-28112d6ccf44.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 0x47e4fb79c542901d18a48dea0663f07107a914b5c4c28275e1785f1f4cfa7986. 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/QZMER2447363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03efb96add22086fa3ab69b322aee9bd1deceadb81e797198a38cb2c77ad2b81. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEP2429216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4435b5e9b95d04998fc7cde566a37a017fe91f60f6239340ff05cc3a27448926. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:54Z), 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/QZMEQ2463371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9daca49fff1cacaa39baa4c5b6bf3c689bcbd42b1d87fdebb99497157a5e34a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:10Z), 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/QZMER2448003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de4307266f3ec221cb9cbc6976e9c97781ff1b8749559c8aa0c410c5a37bb04. 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/QZNWQ2404523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d3df133218ef104c4c034e04b2972a51bdb71b4cc058f8eced4d1791c26dbe. 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/QZMER2429639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb6dcc2257f96c4dd224485504bf1fd21d86d72f75f3819a6eb8178a2a0328d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:19Z), 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/QZNWQ2427476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291f3d3b166607fc1e7f86c7407cadc7fa42fc320e657a3526b3081680e00b18. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:33Z), 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/QZMEP2479146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7d1b51d75c4c038963031566a044fae64d25d41f1b59bfcbec1873e3e7c66c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEQ2443122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c781eb78bece9470200a5a88f8946c04ef115317585f1a4e9baa18c5a088422. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWR2477534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae834ec1865f771f168af196a299b679f64a7af0a243e9daf2283ac21bb25d6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWQ2409795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a5ed9ce4675499ff78e96c851b467174b63107ea27af2b953b70fd0f36c48f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMER2428506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d9a42b67d32062037aa7408464b024d1a698717d9f991bb10e9f1bfe83c1b3. 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/QZMER2433499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5db4a32f470ff3a3c7ee02b0fab6b1c6759acc158c7de7c6b4550df5204a67. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMER2437785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f0d0d041a03df266b2c39ad96ade04301d78831995e244f3029790ee91a8cd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:01Z), 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/QZMEP2475077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ac5cde92cd98026a98d229f90dd35414c9d1f3a77a1fe6152fcc88cef2c593. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWQ2400751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0200588378e5e2dd47119f6445af844ceb048d8fd31a72c824406f5cc7fb5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEQ2471564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a12ddef0283ef254d4d2cd7a4120d7a8be4be59c9b967e565c0cd759a27532. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:38Z), 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/QZMER2414857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55f9a4e389d1742c7374f2e473eb83bc9fccc96da18033ea9529d5f7d1d9359. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:32Z), 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/QZMER2457617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6c736f078b61018de46247eb116619752b3b0ec066c7a0799f820eeeb9aee4. 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/QZNWQ2423994.