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 0x9c8a60414814c51944a6c4cee832ca5e4a175ef7f3e0cd51c2e09334695e68d9. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a47b2159-f712-424c-b213-3c91a6f7ae0f.json and https://artists.proofprofile.net/proofs/artist/a47b2159-f712-424c-b213-3c91a6f7ae0f.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 0xe0e8bf514985d69066ab368c0bf01de29405a04c30a359b122348a913825c9fb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:34Z), 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/GX3HH2216695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893d153315b08faee6c4be365e3b35fedf06ab14aeec675b21022cad5c251dc. 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/GBSMU0120273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53823e90535e2692379718b9ecad9dfdf10499402cbc1faeaa11c25c4d4a7be. 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/GX8LE2215522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870494d4b9621e327d1210d57456ea1bcb8de618caadfc4af25313f61d920945. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GX3HH2370300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8ff93dcc77c3584915e938f695404d3c1307cbb8a54dcad09db26e2d6dce49. 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/NL4CP2318801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d50ab2c39c3cc49c7023ba296fa5e3c27466f5384a913d03d771d897b465ccf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/CAQOI2403521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254291c2419d6aba94b572c33a5d732c0421354f20dcf5ca8ede7c6395464ca9. 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/CAQOI2407117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a694416138268586615cbbba05ce4bc87e556029dbcd0daf7a30f5756f6fd3e. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/US38Y2431672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd25ab6dcf626e2d13fff73111fc744bd0bb3bb9241c617ac0db0b0435c17d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:39Z), 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/GX89G2548507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d28bb3c870e1200bba71a759b325f49e2d04402c9b094751877ba1c9c538b62. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX89G2577992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aceefece94fd302f34bb61141ecdf879dd940258ed6a3d769a66d19e93cfab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX3HH2557405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e23bf0ac14e139b70d3a1dad55e7840065f2bc30a07dd603b40d418b3ee8a89. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:23:55Z), 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/CH7812537466.