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 0xebedc94b97af3b6ac4054170bde1eab189515cbd6e1e1e97c24f0ef722061f70. 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/54083226-cb14-4170-b031-40e5ce2f9f02.json and https://artists.proofprofile.net/proofs/artist/54083226-cb14-4170-b031-40e5ce2f9f02.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 0xd8cceb5fc444ee40e67665aa647e15c082c759380b7210a3c9841c719243c09a. 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/USFVZ2290889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec9bf14a5bdc8117e8840bc59f755783f5402eae8b14d51e9d646ec9e432780. 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/USFVZ2290890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb95f33466e2dfa879c9e4805aec1d1aa4ded9650730fb4ac7058464224bf1a. 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/USFVZ2290891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed78cb981f32d2ddc8fc1a519ea36abd248babd1c5691a5d1e3c55cd0d8469. 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/USFVZ2290892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ddfd28fcace046068f25b9fe910620d6112ec19029e09fa3eaba44209a88f. 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/USFVZ2290893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b73ce3ca7d82299dc7332553cfae51ebedf48e20e05b710f6f04c8f5097077. 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/USFVZ2290894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f2a9f8f97952cdbb0ed2681fbb66300ead313f11457e2a10eb9d06709a427. 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/USFVZ2290895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13331955debdf7ed9a16842509392cd7273ca791322d43a59f5367314e9c84e2. 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/USFVZ2290896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47759ecf13d108c7aa8caf97881ffcf7bcaa8da513c6d36351186f31edf104c9. 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/USFVZ2290897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec7843fc7374da10c909a1db19fe6d344498e5839ff4c5d222b77c2815e31d9. 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/USFVZ2090290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef31f221e5d325ce34139816fad371bdac500028fc66d478179577e0bf93a2. 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/USFVZ2090291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbb1366b3318238608aad668c0deca3e23937c28fb807dde91ff153e272d60b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:42:53Z), 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/USFVZ2090292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1344c3b1473d7f191c96bd8533a833ea05fb653f6e41a085dcc014b66dcfc318. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:58Z), 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/USFVZ2090293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03c23f251803bee750bd48bb7dffa2f029707337f23bccc6f5b07b6cb88709. 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/USFVZ2090294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7bc6bf9d81059f8d2b54c6c6b9917fc7886c2730d7f92a54fcc7bbe16dc80e. 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/USFVZ2090298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc42221ccb91e46559e60007e663c019cfdfd202c553d536627da995e18a2ed. 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/USFVZ2290728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7cf38ee783740a8bf66efb2ffd5b1995a4aa454127dc02045e00c02e542f18. 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/USFVZ2290729.