3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious and
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 0x2dece62690309b4284094299d19aafc65827b18378977c8ca1d8ac8f6e92ebd0. 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/c3a79672-25e6-417a-a912-5adc30a28d12.json and https://artists.proofprofile.net/proofs/artist/c3a79672-25e6-417a-a912-5adc30a28d12.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 0x8f8435c70719d34e9165e78ad832982b3c1684213632828c22276c5e64e2312c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US4H20514671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3162d8fffd66cb416a766bd761f44cd888c1ad64a1cbf2176bedaaa8fa7565e5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USMBR0502829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c76116893692baac306b7d42cc4cf40590da59549baaf7a477764e2cc0a18bf. 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/USMBR0502830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b944a0097dbeb37ac2c74a7fbe358ba0f43f410f72c8ad4de11817e310e56. 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/USMBR0502831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f3477650dc029e690e03f656f7d7aedd9110ace620ad5179573a1ce306511e. 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/USMBR0502832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca841a2e9db79e3b7606a997131e4b8c7c118e2af44d35ed3f16a038d29f6e15. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USMBR0502833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9c47ef5062ff9db464ce7e066ea39e9ab3289ef7c990815942db288d02521. 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/USMBR0502834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e5556d767b3f1db871f3157b2fa9a606ac7290c2694807d56f2902cca7008d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USMBR0502837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa040eb6fac0eb2e6de61d7ccad067ffbd2821827cb29a3d2278d9d48a46ef28f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USMBR1310119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcca67ebf33a723b655952fde2df72a90537115aa5f524614bedbcd5e254f99. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USMBR1310121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75846da866d65a2eb3a70892c146538e4c6bac0a131cf8337b5c5f60d7a3172c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USMBR1310122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5a03f93a6b286b9ad6e541cd40ce9b7ee7cfa82ce9163c2f20c102b852e6f0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMBR1310123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f4b05c06efc96470790825b4f6e1fab19b1a08485ae8fb0b5ae02666bcd9f7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USMBR1310124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a093b579dfd9e93bb157bd5d143af0e20c95bd9f18c1718d1ff776c03a21ccb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USMBR1310130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26534f3ec3868ba82a4c7383c4993da0567eb9997d0feac88a6fb8ded6e75782. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USMBR0906966.