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 0x6c79c99454551ab7661a2d24ec71e281d11320ef057650b54c235f8cfd1d98b7. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83558f6c-b3db-483d-8601-1ea6fdd0490b.json and https://artists.proofprofile.net/proofs/artist/83558f6c-b3db-483d-8601-1ea6fdd0490b.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 0x98f99b679c4b60ddd3da3d657881a686239de0030b00a0369ca3aa425a12a5df. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGK2294218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b57cc9eb3927f73c44dadbf19da8ac8e0260a928a293c42b2c78839ce2a0b3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:53:04Z), 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/TCAGM2274546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9419120ffab033869869bae95de904c1f78d2935221450bf92f50a2c62d984d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGN2237798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cdeb1eefa7405f86a9cadd1fe6c8788f34d384fdf1f7b32fb8c23bc9e405fa. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAGO2220996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a86b8d9ea31a7d5fe9f3730d0b7e503444fc295a457360ac60c14551f2f9d2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGS2393189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4585d8f834e49aedfe9d05eb572fdb4d7ac5928adf9869d1328c6c0a8bb5b3c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGU2394938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0c72119ae47a0dd4498ab84a206f028b94b43241d603711e1822fea9d87e4f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGY2352742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f57fcbbc0ea9781cb7a26dfc96387bfa3ec8a7063703a5a4a85dda96d5d9f0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:25Z), 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/TCAGZ2397772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e356c9a1bad900cd7f7693aaf924f4f83d6ff08c60376b400bda2d57ef0812. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHD2321078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec58bd3182ef25e2524857995bcf423a026b55f8aa03c759af91890780c5eafc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65X2539380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b81062b73e7187d0f0c60f6bb51d10a1d6d6f61144449b699d280988f22857f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT65X2539388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a438e5b991436a875f08f3875703b0e38adc7299f32609174d4d71d393415b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT65X2539403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd2618087cba98388115bdf9e59279c641ed5da432bd354b26dec6e730cd84. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT65X2539409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48c78fafc4d8d8be65c6b998b625caf203837714a5c86e4a3b94be2076e4a0. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT65X2539424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6906d793af14091fddccc51dee0545358e295247c247087eefa99894a598f134. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:25:49Z), 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/QT6632528378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe778e27a337c409ff8d5ca59ebebb8ea9ce72b924667e1ce22c6cbb90856a1a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT6632528379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a3e99e3d4748f61654bafdda532432cf0087023597b67b2cf28294100a3a3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6632528380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e7d701b6f5b16c54428268fab6569e1ee78e85c1908d5f19f5707097ca068. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT6632528381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ce629f3e32330bff47fdee0d4485e13a72dbd7126c641cfe6a0ee149f0a874. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:36:46Z), 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/QT6632528382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74e2faa110c81318264e1c6a1bf218222982c7618865b1d14fe8dda05172fe9. 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/QT6632517727.