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 0x1a8325fb9ea50d8eceefa5db6c62228a955a4767bfb1d5d095baa4c5104b720b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95c890b7-285a-4aad-ad0f-b7a5e9e6680f.json and https://artists.proofprofile.net/proofs/artist/95c890b7-285a-4aad-ad0f-b7a5e9e6680f.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 0x461a046952b11ee16060e5e6ab200ca536b6c11ff67cf520ae552fb35e15b505. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAW2436258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59759286e9075cc7680db7870f716437ffa87d9e05004c3aa4fe37e2a4aade71. 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/QZTBE2455342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00b85db6c8190b8cd69e18c1e163dd9fc11b51cec1af648323ee83c78bbaca1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFU2436491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883bd8d98a5eabee2ebfc86f68172cbbf7d7c2bd3b4742e60e63256b137845a9. 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/QZZ7N2444962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb5a012151225c2275dbf69f43b1a8c715df581173ac4cca9819babe7cbe9e7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7N2444963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165629a6490ca5da296098e18ee7200b53135e4cc0a18b702b833991c71ee74. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7N2444964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b6e4d96efbb988b116acdd5bdfa7d83857e67f8e9ff621868d9f57e5235402. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:40:28Z), 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/QZZ7W2490263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f4b9285c1d7b565b6bbc74d9775fd4847e96a6ae72052a0709e77d794a138. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:42Z), 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/QZFZ62586746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cef18263b1e8e6bdf4936a161df1e1c6debaf34b82f5c1922037bd0dd2788c0. 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/QZES82519285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b320a1b4e4b3a677293f189043a0b163b6b4d2a4fae075c4ee6b26acc344b02. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:48Z), 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/QZMER2571031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aca6024f974c5c098ea13de9b7608ed86facb500450760330ec7c02574da075. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLS2509250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cb4622c76fb5c0a6acd9e7ab938246dce401caac20bbf5a74cca8942723d3c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:28:33Z), 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/QZZ7X2504797.