thumb|Identical twins can be difficult to visually distinguish especially when young, as demonstrated by brothers Billy and Bobby Mauch. Twins are two offspring produced by the same pregnancy.Medicin
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 0x38acba577584014a1048ea59f331e309d375db3e4fb97ec6f6b950620f56a33d. 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/e6fc9897-adad-4e19-b6ab-0662714aaf74.json and https://artists.proofprofile.net/proofs/artist/e6fc9897-adad-4e19-b6ab-0662714aaf74.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 0x7ec6509f47420ef5c36ce1a81f8dd7cce263d573f1b3abc195a74df10922660e. 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/QZMHN2353961.
I Took a Pill In Ibiza (slowed + reverb) [feat. Ben Plum & Twin]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c30c6940598987be88edf6145ed537b509ba4fc16a420e59063c25f8485709. 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/QZMHL2227187.
Sad Girlz Luv Money (slowed + reverb) [feat. Twin & LO RA]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae32b9e0635fb48456ce091dd8b58b76eb2e39a50a2d2900261325864cb0392. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMHL2201369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92efca8d475cfc42f78bdf9021d17b0b7f1ee3fac7cd62daf6b765b44ceb7ef3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMHM2281115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64493b7cb735d7bbfd7f4354a74e7f74468d8fd7d2752c826e27de9318c24211. 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/QZMHP2390246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3716a4ef4c6798970b630f872143e480bad8af6d842df4e4cd0deb800edfe3d4. 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/NLT2H2200671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0cf2b886ecbedf937e0bfe16231ac1293c6964d1a9c810ac73230560e0085b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LE2307855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc93331059a02cdf68011dad8b5a91efb8ad7d7106e7d4a2f33dfb76f4ef020. 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/QM4TX2149794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12449e0f4ea335a60a19de1935eb777aca48dca3a7257d49a32d2d1a9c73f6bb. 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/QZMHM2395629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf6441cd7e671623f93f4e3ceeaac34cd5a43bfde582f04985478e39883f335. 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/QZS632322940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f5cdb22794d9e49dcb008f4c4eb08695e66fc5d04dd47b3b988096563abdbc. 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/QZMHL2375610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe93be7fdab2b77936d176eea8f9bf698576cae81e3fb292954833a75faf1b9. 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/QZMHN2393162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3442267db33edfc524a5da03a706826de235f7202588a0572947aa38b35dae6. 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/QZS652220680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbca4746023053c97e63ccea40ed367969f9765bb20f6c5a27fdf494e4ab4c4. 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/QZS632226805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf2c077e07af76352b6fdd5abe13493b21ee203f68671f6399bc4a317137f3. 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/GX38U2532188.