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 0x60053d66b700827ad664d8f866a25069688457e5d3f7c8535aa9c4455a482b18. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9395c255-3b8f-44b5-b6b9-764e0f1a5ed6.json and https://artists.proofprofile.net/proofs/artist/9395c255-3b8f-44b5-b6b9-764e0f1a5ed6.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 0x822597a0e36ff1837bb84b17e22136d16857e55a6597f4817c1cf5a74616df45. 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/QZ8LD1917293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec65c7ee4b18bc0c6136b2cd1e7fc4a8d6f22f696875eafe4be18562416bb94. 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/QZ8LD1917294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a256202d56d5feecb00f861a0703f1ac6ddb9edc2a259e0cf0c876ccd85adff. 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/QZ8LD1917295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176c260b0cb45b1b092dbeeda158d7bf870c3902f6f08653f1d61344b8db5a97. 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/QZ8LD1917296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1a3502d9779fc328d92cc5ad15c922d069acc52d86542a913770132ef7b627. 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/QZ8LD1917297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bda02b59d029468b3ea793809f1742986ab467d4a19f9fca5310ec7c9b5ee34. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ8LD1917298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53305eddc1fb5ddcda1a42a027ecba19935a2845e1fd8e8c2e6e6673e1432c09. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ8LD1917299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3389d392344d2d2bd945f3c06ac07df480cbd2f15bc3dcbe5e1edfe5151a42d2. 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/KRA382006255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f93613937efbaf4b31cbada95ccedf9273494afae381c580969e03bc68a2e9. 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/ZZA0P2404153.
Out of Control (Feat. slchld, oceanfromtheblue)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e75918d028dc3130c32d71b05d065ad6f69d980e8ec21b8d1c0d79b73d2bec1. 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/KRA382302519.
Nice & Slow (feat. oceanfromtheblue, Jade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e772ee7033966d7d22544cf9d78fab94a200f50836df893d372f749a74a5460. 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/KRMIM2223490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933761a569192514055203a4dd4972b1999ab45c3dfa15ced975f17c352ac09. 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/QMPKX1858715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f1ee783d4f6e17c880e44adc60369db3e2c204f0e7cadf0eddf0f54fff53f. 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/QZDA81855145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b5e8a882254d1257ce1cd34d37ed7006f5696f1909a735155a7ef83463931f. 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/KRB462201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf3a3932403dbb7a157d85c8dc374b0efd452f23bbab30761868308d95e3b12. 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/KRA382163842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5475ebee474c601912a3bc6b69a8dc3761cde5c85301a41f2db7b4fb7520b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM24S2007727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2843573112e9ac3d7ddc374e3800817afe25a7d4865bd51cb96fd7893c4a43. 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/KRMIM1905418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56285ee3b586164cffea9db8b650e0b2cc0c06612592c50e702a8fa7b9828ea. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBLFP2212038.
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