II is the Roman numeral for 2. II may also refer to: Biology and medicine Image intensifier, medical imaging equipment Invariant chain, a polypeptide involved in the formation and transport of MHC
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 0x75aeca57f44374512bdb13aff91e2f59fd2182e1699f44f553b9484da5b786c3. 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/f3a97ab4-373b-4792-b606-12f363621864.json and https://artists.proofprofile.net/proofs/artist/f3a97ab4-373b-4792-b606-12f363621864.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 0x20aac49d779e242045c3852fd6f8d2791d5660a326ce77bad0b2fbbb591a2604. 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/NLSB72300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e724e5e69ea2f35243852e598d1ece7c416c43f5dadcbc0dd51fe16f7537c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLSB72300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa120bed3fc5334499d8e43ae347bec82ae8247b359741cd359362663e89bd0a7. 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/NLSB72300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733cc8e1eac1d67a2aa72b9bf6695322a125534587fc5f83bce2ae0343d40202. 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/NLSB72300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ab14bd8999aa285ad87b10caab7fd452a04f18f2f950ff72836ffb93c6493d. 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/NLSB72300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aac49d779e242045c3852fd6f8d2791d5660a326ce77bad0b2fbbb591a2604. 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/NLSB72300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e724e5e69ea2f35243852e598d1ece7c416c43f5dadcbc0dd51fe16f7537c. 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/NLSB72300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df1f2bddc4deff9a492a1659cead163a756ec737d8d3e0edc81aba6dde4b966. 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/QM4TW2328808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f58cce893c838a46a0c223d2d5fa8b5525aac9f00c20c536551d58a4c8cb27. 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/QM4TX2264215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b69676ee522fa000d6ed1fedcf5c7bef2815d588ae7eca9867445c53b15093. 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/QM4TW2249315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9f96de47078d8a50fc5768cf33978c1a02393ca9edb538878ed1765551e3c9. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QMDA72193733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9197d5dd4845fc3f86e8daf65592f83446fa271b031a3ff60f1b5b9e52bda8df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA72139410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b10a011400b36cae6aa00a8f2650850337a950928ff7416720569c872038775. 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/QMDA62156088.