Special interest may refer to: Advocacy group Special interest group, a community within a larger organization with a shared interest in advancing a specific area of knowledge, learning or technology
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 0x8e10e33a7a0ede2c14c8b02f83bff0cd0e24cc83104fdf919f50aeeef2c801f9. 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/656e486f-4fa2-407e-a76e-57441ca571c5.json and https://artists.proofprofile.net/proofs/artist/656e486f-4fa2-407e-a76e-57441ca571c5.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 0x7580c51562ec1c6bae45a5fcdc8ee7627b1c55db8f2ea2f802ff99b30f497d44. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES61869709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2c6defd5009e4f8775d300d9d104c297a90f7d42f6096fc52ae0c7d08b7a8. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZES61869710.
The State, the Industry, the Community, & Her Lover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c6c2ff195bad3d0660378a84f427b5ce2d1352f33f8c1afc3fa7993612655d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZES61869713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc56d0528c210601d1d7f298e2823b872612fc9d4ebbcc1202d091e785a336cc. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHN42037169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa18bd610fc93dd1e3664f865f8c692a698a2a6ef0d7992bc1c5d0caeab2d9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHN42037171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815a794d75a55e9d3fd15882b7a7846a5f7ef5d3b5379c7b6d947f97305303b7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHN42037173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4939fdd4481ae3d8897535a49bea86a57cd5dc7223cb0e0910f3d229a142847. 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/GBCVZ2200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca22debfb1fedf1732750b7221f2cc0e9d470f65caa0ff1ffd432a5b6d1d7f58. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBCVZ2200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302df45c82a670c19f7d342a34fdd2f2c07fb0b433848e20db30c92bb96b1e3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBCVZ2200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185aba778e54071eebf23a9c8017c43ac08e0084bab0ab13f50687349e42fbe7. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBCVZ2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dfe07a42c7fa9cb82f9a42b2e5219721fad5f21402ab9521fde1355aa89342. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBCVZ2200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb391b5f44ba7f893519be96f9a7430fbf6f45bd3d6246fb4d0f91a813f3c0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBCVZ2200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6be1921d8e39d6ffa82e411c46c0d369a8f0ebcd4f2321fc0d392caf826289. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBCVZ2300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2201c6286f02f538e6b468164a4ca8c2b621bfbbbe97e10976d483a27cf0ee55. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBC2443032.