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 0x156cff5d90ddba86711d6d476c19f184c72bee41b19da474134df25a0c51fb07. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d37bccb9-d7ae-4f42-ba6a-7a55f57c9aac.json and https://artists.proofprofile.net/proofs/artist/d37bccb9-d7ae-4f42-ba6a-7a55f57c9aac.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 0xf09ef17e004b246ec9c9124b01b9ebb2e2520873073a359b796cecc7d5a813b3. 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/NLH2L2200502.
Take Me Back (feat. Weldon) [Antergy Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35701d5f9ce2baaf9603237e4bfdc68943786475bcf8c092157a1e453da2d2. 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/NLH2L1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94994e30721bd5c705ffa185e36da415b3c5f167926bd934581e20b50a16d86b. 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/NLFL71700428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eceba2b3135242285398c327466407a8556104bf1cc4f90e9e5eb323f552899. 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/NLE801800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208e2638a562f40c4da97842af621fb1777ea5bc1cae796a36859d6d97a292f9. 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/NLH2L1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f14064355c6e7f811971e92817671f7dcb0ecfd9250799e694077a5781c38b. 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/NLFL71800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe89ad7f221333699e67549b10b5aa129f24a2087371bac9ffe1c0c2f6bc633. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BEB681800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6046f2a2f5f6aef1b7c3e073b4d8816909bc8af72c9760caf5528565da3a98. 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/NLE801800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b378bdb48be6e04a736169ac7969c0da9372d9c7e01efe5382a35affb70e125. 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/NLE801800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a86fb4aee9ccc9580d0dcb3c8b1264ae51ece57278ef489a0eab2e0c69f459. 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/NLE801800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36ba2df8e09df35b444c04dfdba8382c855046a2e25240fa59d81536536393a. 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/NLH2L1700351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20065f9a08f673ef865aac40dc4cc45f3c91ece1a24da7c9c79ec3cf190a84e2. 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/BEB682400809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a164d715557d250212aa73800902b70690d4dd818964695404679a292fc35. 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/BEB682400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f97b91d306077726d4514773542b44ec835bf0ab1bef0397a8705ff6453da9. 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/NLE802200474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132b039cc7fd0aa07993b19ae0865f8e998306a4e45c73f083a5ad7825087fa. 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/NLH3Q2100921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e963b4ada7dc4bf5cf6a9d3d47b2d1ff56f0497384d2047e02f267e74b9e2a3. 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/NLE802100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72e32402c4669fb07736162372fde0ae075c3065ff7d1a552b0d390ef14dc3. 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/NLE802100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381635a08ae6e473349583de1ad4eff2191bd840d1ca8486efc06b7a0e7fcf9b. 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/NLE802000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b9ea755050916da2028f928c37ea07f85e488b975af543532b81b97290919e. 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/NLE802000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c1fba2ce42cdd53d2c49f018d43ce7cd1e6ac13fd10505570d85316871ea9f. 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/NLS761900707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39d6ea17b82834df294b39d8d4a9120130f118d12b618938a0529b83913c21. 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/NLE801900444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf614735999c5e226670d1ea3634bad556b391553b3cdbd485f0b3c1abda04430. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:06:30Z), 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/NLS761800407.
Defqon.1 Festival Australia 2016: Dragonblood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1183ca62bdb06955679b05b7e4f0a877a76b2b82eebf8176cfcd15a87d24643. 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/NLG3W1500087.