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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570bf26b7657ce76dc4a1ce2996c37f167b1b21c9d2ad718d07d2979ee749eec. 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/01c2d98c-b98c-4688-8b65-ad1887a9edee.json and https://artists.proofprofile.net/proofs/artist/01c2d98c-b98c-4688-8b65-ad1887a9edee.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6264c324fe9d34d5528393e48cf98d841fd6e0eb785b42bb043be4b768e587. 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/BKFUX2302004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23806af67fab20ba1d54fcb261bd1e2f000dc06ff2f618346d71e13f0cd56f4f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BKFUX2302001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d43a20fe128b236eceb2532f25478c4c14edf133551caabad7acbc4dd4b110. 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/BKFUX2301999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa1c12644f6612fd9345326b1d24f4492604d1d3ec81e03324081a887af315. 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/BKFUX2302267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834daf7addfdb80dcce3e2e042955ebb1eb06838c1705d85aba13e1a079567b5. 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/BKFUX2301534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007c34587cbbb4509415de8c84ad251ad0193acb462ce7d98a70122a638cd0da. 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/BKFUX2305824.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc6d55a64f44564c0ed88670fc4b57fde653482d9e7829469a2523974b47426. 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/BXJ0H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a2987b011235154df474c053afa83a2c8d35b7d0964009223188db3d1b30f6. 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/BKFUX2302208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5b8e35b7e05f85aa1083144074dfde05c5c7001035f22828f353e9e3570585. 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/BKFUX2302207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1df42aceeb977aa42efeb477290c862149d8068b6408ff5e0ba50585fa06e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFUX2305786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69dd07fdd0f24d04778d92f53ab42994552f61afd340840771bf274bc227d7c. 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/BRRGE2401389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf41661849cf513a2205c794eb9643adeddc61de266b3250c79b0ff93a97bf35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFUX2305690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112fa11a44bb1a4805ba14a761e2fd2f0ce0f4547996ee550285989cd0acc249. 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/BKFUX2305661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43bd079545fdc09dc5b38c3b3b5fcaeee1406fc3afd3a72637db4f08c231366. 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/BKFUX2305590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0480e8f89279fa74ae6f77e6c5e721bbadfea33f016305a8ea94a050ebc3a615. 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/BKFUX2305606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a10cdce5d4cc2640e151821aece0b329b11e93425cfba1989c9287062cb443c. 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/QMFMG2367746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013d0dcc48736ba3c55e5c2f573a0e72881d27d84c72df0f0ba858adfb024ffd. 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/BKFUX2305474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696bbdffc15f6f2ecb60794298f7b61439c5e82510e2c06e478256ab8a5c029. 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/BKFUX2305481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cec444f805eadad4692bd774b19b4a449da586d50645e8ac8133b5c365837. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFUX2305482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab351ec0a889c0a7b88427603adb51b9a899b4c43f22edba0c3960f41fa0bef. 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/BKFUX2305453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375262e32685f06b12bae58209bb75bf6699ee8f50e6308cfea0e203ba1f3f69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFUX2305419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33542bdc13d1c1b0ffe6493021eb7b41f4e2716fc46feb46e1af103144803980. 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/BKFUX2301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67c4b7945923aab36716a8d8fb901fd72049bf7c052c7df6d54d17f84a850e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKFUX2305472.