thumb|Sister Sin performing in 2009 Sister Sin is a Swedish heavy metal band from Gothenburg. The band released four full-length albums, with the most recent, Black Lotus, released in 2014. Sister Si
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 0x9580f107a1052b5eb34c2878c25f48a3c5c6a24583e01fdb803f49daa9a2e3a5. 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/9e8579ef-3573-438d-878a-48c182946268.json and https://artists.proofprofile.net/proofs/artist/9e8579ef-3573-438d-878a-48c182946268.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 0x6e6c33458cdc832f9d20b3084b7e5befd0929cadde256bf010326ec22dc6055f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:03Z), 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/USVIC0848205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89417ac9fdda6958796c7dd8794c5087210a866a2a6fe5a47a5c7c2ceb92e747. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USVIC1055804.
Rock 'N' Roll (feat. Doro) (Motörhead Cover) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c915813b781d39314995f680c716fe9aa7adbb44b7ff9c580e97753b6f8c6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USVIC1266904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da92b0f8b3b77f8a0eba2d5801e77616d9bc29e613b42520f5eaeaafef9b26d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USVIC1266905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8579a46ef1fce72e3d9a0e1088bed87a1f003e793203979dc9aaabf8053c559. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USVIC1266906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696f130b1504bf36ab8672be823c157475adc67faa2041e69b2f9c9d592912bd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:57:08Z), 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/USVIC1266910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e500c1a5e479ab09e0965cb5108aef6e6690b3304645da2fae01df3e52ff60e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USVIC1471201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4209c81fa83b1de5f680a5aa95f6da605ceb1754ce64f22c2e8b6d205ab87794. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USVIC1471205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20522079a64e46eacfd92d0d1cefe3c55aa694da126f02955e224a3b29e4a2a8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USVIC1471206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba7ccdeb28d54ae1401ebf9d1c2d45e79cbe5b77e49a003f9191deb77b495b1. 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/USVIC1471208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b00124348b713f0ddb5dffe3f85310c750d673f1751b45bee2f07832f0a3a0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USVIC1471209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a46488f73959d75fed742d8c825a6f4b6a2dca4cf3464d86e6abf178ca90f1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:23:26Z), 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/SEYAR1300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7464ac558de7a89de987d80447d4de0d7084b462d40932656e49c4f2190a1acc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SEYAR1300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f3076a3e4a7dbfc17b4d97d47e06e84cb5e6a6beeda3ce84a18f7d1e17352f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:56Z), 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/SEYAR1300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93952d804c92d9ce6070e262ca53dd3f2cdb2f338f5ec9156cb56b9587a70de4. 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/SEYAR1300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb658a00638acc8e145e95363bddbc404aafbd5e47f283ea5e6c237d45f608cc. 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/SEYAR1300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54bf0383810a9a4ce5154282c20b4cd889254991c239b050db2e5f2bbb0ab3f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:52:59Z), 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/SEYAR1300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb123690d882a7cf86316c5a79683eb9fb5f7fe3dda34313bd86576f5c4fb7786. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEYAR1300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d9320696425bf18f379d622e03cd1f379f87e05948c9180766477c51163002. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SEYAR1300510.