Rhen can refer to: Rhens, a municipality in the district Mayen-Koblenz in Rhineland-Palatinate, Germany Rhens (Verbandsgemeinde), a collective municipality within Rhens Upper Rhenish Circle, an Imp
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 0x04107066647375908bf55e5a7c63c0188955b911abe583cc090e535c6d2d5a4d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a198e6b-ca9f-4cd8-b24d-dce5fb892ee3.json and https://artists.proofprofile.net/proofs/artist/2a198e6b-ca9f-4cd8-b24d-dce5fb892ee3.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 0xaf4500c69c718eac61f8a1f8c2908abefef60913b124b8d7c70f49eac3f12b4f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITDF62019534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ff26dff43a963300928193f3eca4bffc545b555571bea96efb664fab330d2d. 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/QZNWX2176523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f47aae7bbb56cf533491df1886d3091199df71e3b89280ce9c61f2db4b19b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA52106941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a0939e5b4c738b4e3deba50fee3d5ebdb0592dc740af1596092a38ca7b770. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX762175935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1b1050e17afa3a3ba257da61129bc43880982eceaf0146f2a7f1a64de05fb2. 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/ITUEK2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2001c4ffc30ce5e360d28ab3dfe10eb91324d762ec5ec879d07f17483f09e831. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ITUEK2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec29c794b7cb58ad10d055f487d84e0d1b349ff186745e7bd395ee7aa0e6aa5. 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/ITUEK2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabc4e549f39f71e65fbfa7997b2446afe7e7877ed7144b8bf7c899d3e37492e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITUEK2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6725bf9af96b368fdde3a40a7cad45330dcbfc863a48683e15366a78b04087b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITUEK2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc497b005cf4de208ffbbaf39c81c94c6570c0443d7ba495a765d8c2acf4acd2c. 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/ITUEK2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78aa76ed2dcba956b98e08c76cde9723e25f5440c70476beccdcc486db11bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITUEK2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caef2e5fed3a74c51d05d0c4e290eefe5e75237b3d882abc5ebd68f46ffad00. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITUEK2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd7c3620a1242b243c9a4b00c794e89217f56e2a9580a233a909280c12d16c8. 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/ITUEK2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4ac079f53d25cfe146b9bc1812c4203fd6bafbf8d33fc1b8ceddadd73fea4b. 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/TCADZ1875892.