Cellar Darling are a three-piece Swiss progressive metal band from Winterthur and Lucerne, founded in 2016. The group was formed by Anna Murphy (vocals, hurdy-gurdy, flute), Merlin Sutter (drums) 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc852596dfb9e44a08d36487c702a0e45b72b79814fb779e720b5485692784a5f. 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/73f1ce93-ad83-473f-a5d2-63515bb1485a.json and https://artists.proofprofile.net/proofs/artist/73f1ce93-ad83-473f-a5d2-63515bb1485a.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 0x192cae48178cca7a0315c40fce79b69e28b7642fb1be3d4fdf607f4466e8f5dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a713eacb0dfa9462b893bb54a205d6c224d1e2bb8f5066e2ca3f9bc646f398. 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/DED831801957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67626c079fef451b30b6ea347d65b088b87d982f433222d44df5587f44b3b495. 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/DED831801958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c1a64ce17afac7321e2b593b5f1b8e7d0f43c8c9368bbf92e339e911ff007f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831801959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c86c1fb04504fcba7fac7e14487683b4c5a5e50a5a85f294433425cd77c052. 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/DED831801960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77651c0afd3df4bd95b3f681f0e61b50178a7956398bde5756087e36f8211b0a. 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/DED831801961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7491f615ad6f8a33bf6560225f1d7bfe0e4c242950ec0c6f11f514469d9c1b. 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/DED831801962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3b2dea1e22e767803260fbfbebc746127983e07fd0d31ace23ac1db18a93d7. 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/DED831801662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf343b53f011e5b4f25271dfe7141a4bd57a789581341130e3e47ee1c41147af7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831801964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a683a0e41782c4d7bfe0511374db2f17091c8e2043bd8188e54f65314d17a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f84ee826b0440ae6cc13be4937831ca519086ab0571fc6c75c56420276c96b. 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/DED831801966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0ce7049d2a505a2ffdb7c9059537aee67b3c490ecff9cfc6b8ea8eece26dd0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd4f3c88500d2309eadde29461fbfbdfcec87dfb99a43c2c9d5d269bc7f0594. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23284acdc400284ce50cd82968681db1dd2feb381bff94e14b2665fb7c57a354. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831700583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c10265212d2aaa1bc5a0e7ddd523a7f124546d5b34138ad6a39b63aa0a2ba3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831700584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087884220cc6c629d25f9fcae650d4f4490b06cfc45eac22a0bfcb99d1e35cad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DED831700585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dc3f9fd86798d9679e12788ba1d82322d7da6d161c84efde28a210ef1867d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831700586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e83b0408943439fe454e6795ebf7fdada7e4a44178f58ed4f988fa7345dc3. 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/DED831700587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5660517d2c2f9c76af9fbe78032271dfcf014c52c56dee86652f648f2b40783d. 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/DED831700588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0639780ee6e2e06f5d490a591bc5a7c039a4903c17c52dd3face8c06e2619568. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831700589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c913568a9889a75a5d9a3273bfc5dd0f68745d2c5f05d08ae44df673aa9030. 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/DED831700590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d072f807c3a24dc721827eb423813afbbf2f57bfc6145ed0f0af320cd46fd1. 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/DED831700591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9430b146ec7573484cb9adeeb818b37ef4f9e7e90aae560a3c130e30f2c485f9. 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/DED831700592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ffa398d1c41ebee4c9848cc21e73a1ae3b804cb85b8dcd7bf332dd4cecad0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831700593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932b1fa77cb0df30dab8458f852d61cf8bd66ffc5f658929caa0f32838bccadd. 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/DED831700632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee8d31883d1d9c9152dca33191d1dc72ba199543df30c2cd69766d775cc829. 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/DED831700633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60262ae2a498b1aa22e80588e95fe122ce295d75005b43b676b859864b40623d. 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/DED831700634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0bb44d595e8caf8b5b5238f0b1fb35b35f7549ab02d20450d87cbb6839c86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED832001241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed759ff2f1d21c68dfb26c7e5eb3053006d7bf4c799c3795c2ddf83216b693. 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/DED831700387.