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 0xda13f9ec7774278fe26c7ef3ba106309c1d53046bfacecfb7ac1f4eafbb84b43. 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/f512b4c1-762c-4f3d-a8fb-83379e6b4631.json and https://artists.proofprofile.net/proofs/artist/f512b4c1-762c-4f3d-a8fb-83379e6b4631.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 0x09d9f8e9ff8f5741664c71f01210c655a695284f11cf7732eb8183d4afed21f4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5BU2017067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59fd67309127d316d0e01578f835806ddf6185b592a971992e547520da24d5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZFYX2154951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d72a189d3c38483ee722dd362126f2e27a0afe6dd668cfcf19b6e0a0d861d70. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYX2155952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf787c94bd9191882c588264a7002c282c77ab09ba6c6fac79be9f525c8aeb8dc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA52163364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb5a8378b8c55a68f2a6ee513812e17ab8f8e8605a734f2f46beb02dbf74d95. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNWX2198665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377f8b9a70dd7cfc81f2dd98ba68fae8b0086f259fc0137dc89fa420577891d5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAT2177241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0677cfb17705b13ffd4e043701616104bf3b1581784bdfabf28402a9e6bff. 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/QZK6N2239333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1f33befda498fc3e120553a3d2d6a1ad0cd8e4f947754c6f036c0f87b16df2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMEM2257532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dc34693540ff4bf6d31918a9f17701fed7dc491015d8aff25a115afed68f70. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTAW2205502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47376d402580a563ca7b1a5f1f3b8a1031c871752f8e1f823e2f2326c59c424a. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZTB62290653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413981af0c7e1998a9d38973c09a8cc4e9713b86c6a5012cd16263e697d96091. 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/QZTB82265734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad82868cf9dc40608ee1d1ce072c4f29085ab4ca9748faa41107793d343018eb. 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/FR10S2337452.
Happy Island (Slowed + reverb / sped up)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02736b3a4e10586dd05c19f8ba3f489caea1cd6ad745e128af2a74f11fd822e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHN62336755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21323070e19f38d8d62a2cfa9e82af25e887be03679220feeea9e3f4fb8b559. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZVEM2397506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f5e6973ed25461211f959f828ac6fd249a1a3d10cd1a44de7bd5097cc33dc1. 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/QZTAX2364667.