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 0x780d733ab9978eb1e0ddd00a3f84271b8ae198eaa8dbc0af838157d07a340386. 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/f65856a9-4b52-46a4-9a5c-fd630dc831a7.json and https://artists.proofprofile.net/proofs/artist/f65856a9-4b52-46a4-9a5c-fd630dc831a7.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 0x41f6bfc34908feadda1c5ca5ccd97d71469ec0b0e0652afba1bb418d4655d62c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BRTRB1862670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef27c69469af70fa5b9352905e55114a111076e1e98518333c33ef0abf1383a. 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/BRTRB1862672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc202d703b95b8ee60e81b0456a02b98215c4ef490044ac02c63c9c9dfa73db76. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/BRTRB1862675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd5af49468c6bb9213581c49c0d4df87f45079850ba95fcc3779639d5d51fda. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRTRB1862676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322057b07093dd76a6f3214031a85e639e668932660742dfa4530abdc6be6f7f. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/BRTRB1862679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57fc1039c3d61f7049aab95a97b145648481cddad6ae0fdb75f52e47ef7c75e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BRTRB1863927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da82174c86cb39bebe6cbfd50d8730c47fa13c7252a156a342e354a78b76468. 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/BRTRB1863928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc352b6be52e79f1ffd08984a53ebd0cdbc697cc117913964b3fc3d5a3589fbd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRTRB1863930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f099812835f21358b318d05109048e4023c0bd16346a495952d5df23c24b05. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRTRB1862544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16e6eb2dc7a6d536fefe70e71c7d31d94f67c21be7c8c8057931ac931aa3a04. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:43Z), 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/BRTRB1862548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34befaae260ed74b46f33eb1664675fcc5b3e36c3bd0245f3daa82e5e9fd0521. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BRTRB1862567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af4e736323c29b8783774a58b46755f90e4c3ff356c75afeaa983eba60b91e5. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/BRTRB1862571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20559eb8b3079578680e75c6ca263c2db0b3bc53b667b3a122b712bb5054d557. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/BRTRB1911990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd2c3c4df314cd94534f966a7316f7591a3817a68e04237e289bc156006954d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMZ92376244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7d9800469a758dd1f0d4ccc9c451c0494aeaaeceed610ea0bc61b98ff7bf1d. 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/PEZM91902580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ac04dee8f5b0b0532f78781a5cc29bb70edcf195f3ef9b00ef5be2249490df. 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/PEZM91902569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b1a1b77906c6861332c863cfedd7d6aba9810d02cf417b64008ba8a020d19. 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/PEZM91902561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173b55f26babcbcf3d1eee117f0c3600fd42ece5830bc0b1701a813963bb30a. 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/PEZM91902571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe144de7fc212b6a8a72c9b8683fcb3978c98d73802d67a744c985d0cd7a5b8c8. 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/PEZM91902579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b3b0b98112953d2de48555d269ab4eb9eae6c9b191b85226e15c2f0942275. 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/PEZM91902574.