upright=1.2|thumb|Singer's Midgets toured the US from 1910 to 1935 and were "enormously successful". Midget (from midge, a tiny biting insect) is a term for a person of unusually short stature that i
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 0x17753aaab8ae01a893e2fcb632f5185f6511bc9a3518feb3b3630d1195a1b420. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f47c18a-6641-46d4-8918-134f7895d3b2.json and https://artists.proofprofile.net/proofs/artist/9f47c18a-6641-46d4-8918-134f7895d3b2.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 0xd85c00d9b0cc1016c0ec74210a3e43ec8fb1f6e0b7bcaad99a08638f44913486. 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/USPRZ0810137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a241eb4df6c0dec48393af6b4b9eaac00c828d5cc7e104982a52cb88db0af5. 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/USPRZ0810140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ef1eb0df330b4c5db27549871a20cebbf10add99585c7642d18a380e4c9650. 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/USPRZ0810141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bed0c5f90708b1beb5bc9bad8f36e3ca6a471facca89109625624df91bf9ed. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USPRZ0810149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cbbd8195a3899c5ead0ba847098a9982442e5617e170d44e7bd5344f46c5d2. 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/USPRZ0810152.
Maquetanderground (Mixtape Maquetas 2009 - 2012)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cfa00a23431bedff484710be8ca8f0e6933017608150b56d3dab9ce0717fff. 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/TCAGE2255477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b12dff2c132b8e4286f6b7e80bc3812a82b7a06d35a37eb5fe2331671cd1bb. 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/TCAGE2255548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40dbd275ca03f2e02b71a9b7a4ca5a67157eb892d8041b0c043d5d473fb5675. 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/TCAGE2255552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e5d88e1a377cbdf6caa2710d29a37e731526e49b1448bed65c3fa123f14d0. 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/TCAGE2270383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150739d2500efbd45d948f7359ca9946bdf72b2d00c6ba67cb1455549d1c277c. 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/TCAGE2271045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bef1f8663ea286dd3c0563bf02f77bb961e921d91fdd0f3cae4caff499b9a7. 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/TCAGE2271076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b82fc64beeb56c32130a3dfdc3d7ca19552cfacaa25e333a2efe57e91c965c. 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/TCAGE2271189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3cf9ebab44e489b81362bb9b855de13a2a3ea79f30ef65149c44bc0b9005a. 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/TCAGE2271241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcc8358edeaf9353ab3aae761c7ab27a1a78926480611910e9d285a10720931. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAGE2271247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f6670d6ea29f5de78d74f5057ac786b4ac15ffdaa7f415f4c6e1deccff1330. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGE2271263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ccbdbcf3489b9c17017d776a2f5438d15303e935834cd0ffd3636d2c03b488. 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/TCAGE2271270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c50e332545da8a76c319c7cb21db0a7786efc14975516ab817b325ae01919e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAGE2271286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a28976b552ebb9aa10056a3c6b0ca6d4d9fab0f118b53a39e631cf48f5449. 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/TCAGE2271292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6790ac032b5ad51780f75dca0b61a4c1d8e24d7be7692ee6ffc8ec4470366df. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAGE2271305.