thumb|Horna at the Dark Troll Festival 2018 thumb|Singer Spellgoth at the Dark Troll Festival 2018 Horna (Finnish for "abyss" or "hell") is a Finnish black metal band formed Lappeenranta, Finland, in
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 0x26ab83cd77d367e33b702470adebecf05b71005038746670face1e01520a9a30. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7020ff1b-41b9-4a44-bee1-fde0ecf38166.json and https://artists.proofprofile.net/proofs/artist/7020ff1b-41b9-4a44-bee1-fde0ecf38166.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 0x18a3a507b7f8bc382e0eafbefd6f02481791d28bbff038afc80736aa6af4c46e. 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/US2420503601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca8165ec97db2573cbe3ba093bf54d143d7c5b8036ff83500743c7660d797da. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:28Z), 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/US2420503606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580c2420454319047da668c45ff36a522bd61cda04ee75c71157364c46825ca4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TW1624839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2116dea2c90b5697f9f242f28fb88402aec21861550dd8540eaccf9e49a02546. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM4TW1624840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6c54ba671d7156fab1ad1d12801b3df1f725ca78b6a92bd7e8c5b629f6056. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:29:31Z), 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/QM4TW1624843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c9dc57355533784082cac265f84867116679a5c5479867b6e09cedb032d2f8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM4TW1624845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c263bf6e2d0cc54dfc9f7742f6c42c6ab7d2a2192d139c8ac4a0955c9e4fa5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USI4R1018143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466890d4e2a1244e6ee945918d3d48499f57fd7d0b67a2f6193c369d983cdde6. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USI4R1018146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbea5a58694f52e4aeea104cbcb5931a05474636c9868c1ed3380cc60c362d38. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USI4R1018147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56d57af5e65b213c859df9639db550581bf732e1c4010088c4dbc19eadbd71f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USI4R1018148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295c1a921e3a0f71e5bb5920933d91461b7304b2803535e6ddaa3f0f16f26069. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USI4R1018153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96058bfbcfb2965df0dba988e6e902d73401ba250eaf3c7a52676186f949d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USI4R1053406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc300d8f934313326a7dd91963a0606966475077ce40db817c70c5a873cefb1d8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:42Z), 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/USI4R1053407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a80131cc8771bb69437d82d44da94d0eb5d9b1d1c2063c279083cca7db640d. 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/USI4R1053408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edd53a308eac5c5d68c73e8e40c48f9cc7245133f836450e9381d85790d70cf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USI4R1053409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da232051abf83508eb43ea55b2f59f92f433d58b34b57bdad856583f5d3d1cd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USI4R1053410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f727b109657f3e5cb9bc29ab1df467a38f5abb7e46c7d714fa78911d3f5b5b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM81479433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f68fcc967be5f103e6187091e320d9d2996f1c4b5e31063abd22b015c58c671. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:44:36Z), 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/USL4R2020780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fedab3e5dd5ec6530af278d3629991bc01dae3343a725df4e8559fa78e5738e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:01:16Z), 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/USL4R2020781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e11ac0db84790b1bf30b9d7a7ac81a1b7dddce4f4d5b52fcd62392b29bed51. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2020782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d35ad7c62a55523d901722ddfa3b088592e00e50a74f5b4a07710eae002893. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USL4R2020783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fe25841701235cc408d9977950f4b3672656a656661ae02e1a9a33de92f29a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:02Z), 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/USL4R2020786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc66fba84cec67f01739916da181f7024638fd3aa94ba2399593e4f6946550ee. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:44:59Z), 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/USL4Q2428619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7885dd00832a29f2e0c44f77faf3e090ffe26069371751886d1d436d65dff5ad. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USL4Q2428620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b77a5bebee604f6ee965abf90b36cfa56500e949ebbd6986f208dd1d68745. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USL4Q2428621.
Tribute to EMPEROR - In Honour of Icon E
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad289d6fc84939a351f7239b6e3c24736dd0809dc873f690109a13e45964e87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBADD1201110.