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 0x9562e4ac5c4e7200358929f2e50a2f6281deba9f6682e7dc1f2f9f1fcacfb933. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/693ab786-2fc9-465d-96b0-cede23f93ad7.json and https://artists.proofprofile.net/proofs/artist/693ab786-2fc9-465d-96b0-cede23f93ad7.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 0xa1f8bcfd2f84a77d58a5efe948c28b8dbd026b22a5fe16d70a611fdd7687ecf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK2D51700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082015adb6327ca3e7eb0ff7e8a5e63fc6cd2a04afadfc5e69016b9a6a3e3cb3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK2D51700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2335ae502bbe64bc9fc5842fc978eb19cf69c5a5e49acad1c7766d49f43856. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK2D51700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9390059d5b20a3ca3e08cdf3e9b9ea98d013e54047669133fde5d0628ab102f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK2D51700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f9e4ba52e623f03ba23d3b044bd590fea1428bc8b9be7f5dcbbc02ca941963. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UK2D51700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c641994ec272c626c6ad72e8704428db09c71c1f7517151c1294998784d2e9d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK2D51700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726fb723dc887e6f1d3c3cc517ee1e1d374684b98303efb22048ca1eb7bc8077. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNC2247745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082015adb6327ca3e7eb0ff7e8a5e63fc6cd2a04afadfc5e69016b9a6a3e3cb3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UK2D51700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f8bcfd2f84a77d58a5efe948c28b8dbd026b22a5fe16d70a611fdd7687ecf8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK2D51700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f9e4ba52e623f03ba23d3b044bd590fea1428bc8b9be7f5dcbbc02ca941963. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UK2D51700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7989af0cb74d7362cd9f73d22d6ddc0b45675b9b337b9f046178ab1921d064a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK2D51700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc49c87b590274888a34c3923ceb545aa25921ead915b82b8ec3d97468d6813a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK2D51700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bcfcb790d48a7cb2308edfd1eb1f4d75bd02d36661d8ba71ec7914e75c9c5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEYOK1202772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa67b2763d3f60c724aedcbaef2a0531946e7e7db5a6a49193845ecb72723b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK1202773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75167c3fe6f634c0cf79806bdfa4a9c657691a5acd384b28cc3d19f7e13e516b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1202774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a1ce4a75704f06d9b3035c04d2c806ecd2a804e75ffebf037b2f8db3c13daa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMMUK1900218.