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 0xd5f369d3f1eed5d9e314fa52e555a3812d76272d94a46ef8e75e2202893d2f1f. 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/af523f48-3da6-480c-a23a-9e4ce5dfe38b.json and https://artists.proofprofile.net/proofs/artist/af523f48-3da6-480c-a23a-9e4ce5dfe38b.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 0x62c9c71c8681b145bc3232a4b74675ed9ee45eeb61629be267f0544cb69fe2ef. 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/ES71G2319965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f02426c28ed27e980fe93f0291071dc8b1b66f0fa085a72b3be523211447b. 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/QZFYY2399714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf28352a35f7261cfa8608996c1f9fe6fc68b190a0256db4a738859d8db132f. 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/QZNWV2218374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dd121d98f5c0a6c36d56170c00372eacf2d4a2443238847ec6ea02376a967b. 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/ES71G2219730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393094518c649deeef871112cddaeeff8178db5f4db0a36db6e4abc2f1c98670. 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/QZHN62250713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355917990623141d60baa18cb0d2fe69f6002d2582c2e43ae21a0124b25a042c. 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/QZFZ22266932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a3141bf410a075d3ba43b91dc28bc60d5141397e433da19467dd31f37f1a28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWZ2195160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293e312f4f71adf163cb26df05b110022a0cacfc88faac98e73916a466c79d3e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2139961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7c895727f06b60a090fc63039a02a673b9139c3740ec7d2fd7e554ebc66271. 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/ES71G2129292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a9786edde4e08fe7a87a0edbeff48f747b6e191286cc0d9a14df0fc0554b0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6K2057679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6c5b680564247aed52b4e1594f4927d707f5181f74362e7a5c5c9163607020. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6N2084270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30223fb923efbc0d58ae6421e9ac23d99ccb286384144b2081e51bd3a240c551. 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/QZHN52003773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c85a6bcd943ca677ce286528e975860e52af483b2be7f310cb23950b193050d. 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/QZES92071742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465967471c7d580eb91cacccb8afe83c7182bc088c773af353e42732ae0b0c16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52066963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7776983d56818dbb550538ef620bf814d906650a4afe526df6757ce2e3db04f9. 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/QZFZ62009864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b327e532dfb21cc69be13462a790c71997f5b4bbf3257a7d660e97504862285. 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/QZFYY2072039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00bddeca9439ece10e13b4f5ac2b4ca56aa747c99ed7e0299315ac604726d78. 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/GBSMU7429563.