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 0xd2d788561b6df5253b2a3bcd3c4d128309996e0f16999a6fc01ac8cd6bb2690c. 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/9aa85f0b-6dfe-41dc-b599-38b1e09a56cf.json and https://artists.proofprofile.net/proofs/artist/9aa85f0b-6dfe-41dc-b599-38b1e09a56cf.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 0xf68341da805e68b8e44cfc2f562deaa6c840539f7fa8db7a452dd8d8fbfa302f. 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/DGA072314397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fbba4e4ed9145ea8c225078a8b6b15b53918efbbf49de8435bd91812fc052e. 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/GX8KD2302570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc061591bc63a68338dd3bc8def7a674374399f1652bc61e5014f022be59f116f. 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/QZK6Q2306119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507dead673fa750013a2276f5854a4c47f6d9646571042fd82806e863d49a9a. 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/DEXW62400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64588cd7c7fcda5c0d7827da0afd8c85486cfceea445a02904333c5331085d4. 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/QZHNA2478269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb83fed19d8b77bac62d220fc553390eafa320841b9d8b165c617307640a3932. 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/QZWFQ2321317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6ab24d5bc996a9c2a5303a5062dda47795b7d00739beb37a3e984023149fc. 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/DEA622302799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f1002fd51d07fcdbf555f1a083e9f19dd9bd4381bdff4a16d3f963204f1a6f. 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/DEXW62200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb43c5574e8693ed5f75c1b58912451eaaa7fd397d3dda04c2471da1040285b1. 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/DEXW62200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f5fbb75fb24e6f2e4df3ddbd071ec1082bdf94b33a38b44a48739f742af634. 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/QZMEN2271694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20705d9c32214843cfd81a0b7a686485ccd440a18d0281a44dd9acef7419ca. 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/DEN062200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83cf20fd3691f4abe252a5cf0f481b2d4e562571b8d735d336537c63a47210. 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/DEN062200335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed82c5234fb3d42fca3d7388cb4122f574d8e404c940ae1fc89ad65acdc2fc40. 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/QZK6Q2195985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208855d289e3daa18f8bbef1d206c8298aa32e92cf3a7d55a8ce6991eb658fa8. 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/FR96X2171893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d285c4e68201cdf6bda790558bdf8789a4694b3a3ae7989fd073a1b4929383. 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/QZMHP2081225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e99ecc4a9692537f05a532dc20fcc9f4475ac7e9d703781fadc684d78ffedb. 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/QZMHM2083740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f09aef2ba0e26456352a4b6f5847ad793e047b195d34acf83c0a7f3a9b144. 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/QZKDK2024098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c398a2a1d833e570357a61b453b9eec9d336b73ff0dac37333bcadb78ff807. 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/QM42K1919368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58f756ebcecd3d1ed854d3ad7371fd7be6690bf9a6dc03c26fd5ab61b6d4178. 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/QM42K1907082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca7eb0d3e6b65507f585015a5f4d933247f443078e357ac0fecdc536ec2dacd. 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/QM42K1989619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ebcec01f13d2b10462e413de39c924124a5655b8ef57661a9f2f73968fb07a. 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/QM42K1957788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b69bf0ef2d5930154a0a0078074f1da7220f56cbe513b605547a563735a249c. 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/NLQ8D1800225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d2d576de1003cd1f5959ebeffd0c35ea774f65b7282543d600a01a100116d4. 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/DEPY31700691.
Kontor Sports 2022.02 - 130 BPM Workout Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd9c9cc6f6a96d00b4b882947a984a9649debcdff6f820462f486bb7cde8ec8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN062200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cd823cfb805861273db1ab6c0a6beb9eec89bd125a38588518eb706fe4081a. 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/QZES82502489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec4e5f9fc5389d32119de5d59533ef4cfa3556257b089c0b3fca48e5cd2661f. 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/QZWFS2474762.
Ohne Dich (feat. Laurenz) - Mashup-Germany Festival Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cf9a760486bb0452cab9a745168629bb58f2f2ae41b8415b8050fcd1444fc. 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/DEE861903838.
Ohne Dich (feat. Laurenz) - Mashup-Germany Festival Remix Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc712abd94306313cdbbb2e2bf0640f10b45557d2285e462879b747efa7a6c49d. 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/DEE861903839.
Ohne Dich (feat. Laurenz) - Crunkz Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e24ba36d0563240f44357a49368597fab04c17771aef1077c6e7ab27c588e78. 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/DEE861903840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ed09ec2f5ebfa351d0edcbfe87eda5bb007debe88d90a1326376c4cf4a79f. 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/DEE861903844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507dead673fa750013a2276f5854a4c47f6d9646571042fd82806e863d49a9a. 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/DEXW62400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c140b109bbe21f18af2a58cb97cf648b3c4c81e8566d6cb9c08096a5e82ee. 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/GBKQU2449044.
Kontor Sports 2022.03 - 130 BPM Workout Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eba84a698daa438b319b282eda72b967dc45174d1aaa2a50c75c3051199e9d. 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/DEN062200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff471c221fa6f78e60e164a935ff224e92863e40dba8fc9bb4419f677dd3e73. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN062200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e4b0ece6182b632392a5ef18f93f0c08b51423a20b2764c718b08213389200. 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/QZTB82246479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f3d2b83534c5c468c77641f0c56a0ea7de3d7741cdf3450e2f760977152912. 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/QZNWS2249620.
Kontor Sports 2022.08 - 130 BPM Workout Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e72193700ab65ebcfc7915ca0e221f2cf9905780e85712d5d6a1e0779fadd4. 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/QZES82317114.