Croche can refer to the following geographical features in Quebec, Canada: Croche Lake, in Sainte-Thècle Croche River (La Tuque) Lac-Croche Zec de la Croche See also Aiguille Croche, mountain
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 0x20d171c390cb4df316f139e0ceafe61cf44ae2173bfc8ac54c23c63447f0bbeb. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deec379b-4838-465f-9696-03692557c932.json and https://artists.proofprofile.net/proofs/artist/deec379b-4838-465f-9696-03692557c932.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 0x8c2f9d733cce17e07c3ff3e1d9e341f1bea7e48313915bc319ccb7a751700c18. 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/USHM22456778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0699e6395f87dceee633c8a9e9ccad469c10e543d01b6a71ebf284db5a92f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22456783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea6c2710411c5e6fd3e2263c1970229898749609f967d963785847d52ce3e7f. 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/CH6542218201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dc6e89fe9d6b6845863c17992a24765f3451dd342d4f536425e4b8cb570725. 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/QMDA72350250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5d7ea41e40f7b55cba422e06dceea579757f9b02e045014e87a4ed1b92fe6. 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/TWF571100414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951276a32c8eba116c6176045717d8d636382c647f800ce396e30484032ad4a. 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/QMDA72359300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103bd3e939d79b639c1f75c8ba6dd45252a355041e55ddfc50ff4131b2039be9. 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/QMDA72359328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fa0a777c1089daf18c98e6d7362893df7018a6dc2b777071655996f6a55fe8. 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/QMDA72359335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fbf48e428ad79462da4ca13103d8666581c64327d4383f1e1d2ada978cfe80. 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/USCGH1170441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187107e94a31773d1031b150e12a40493a3aa660714c3e6981e98c62854eac2e. 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/USX8C0600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088cb3f5a300ad751513acef8ce49d0e7ccf255f27c9aa69a94e16cc79ce375. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6I32233352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d860e949e4fe611253bb63b49de1e47fb6e656c306323eaa1e9d75b1864efe. 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/FXR162200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44e7672d01d3075615ee96c9f9ef22b36691beb4e87ca93ab2e568b8ed353c. 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/QMDA72359402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a3414f04c0db3e333e72d0dc97db7b853ffb5b27b078a75363c1108b17226b. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QMDA72359416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088cb3f5a300ad751513acef8ce49d0e7ccf255f27c9aa69a94e16cc79ce375. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6I32233352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b95f4575f389fc25b10c59411ae31c072b12e0817ff65b8d3da5f0ac89d98d. 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/USDY42397778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ecd21ab17902df9369cb778bb3a0a0c68999471a47c72294e893bd9f8a0244. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDY42397779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa2104591ed5af1abdd55fadb617bebbedabcf8db6d1ac3a73d8802dd77c2f1. 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/USDY42397781.