Barren Earth is a Finnish progressive death metal band from Helsinki, formed in 2007. Their music is said to be a combination of death metal, progressive rock, and folk music, pulling influence from t
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 0x07ba3f713128545df898e00cc7f383658efb000305fc37152bcd1457df8ce032. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8eb94c3c-1045-44ea-b1b0-ea3a98450dac.json and https://artists.proofprofile.net/proofs/artist/8eb94c3c-1045-44ea-b1b0-ea3a98450dac.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 0x2d725b8c8d7024ed4e428910b0c19359cad55d8376961dd83329359d0ac2e1b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:41:23Z), 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/US4E41747001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363e572f87571684b63e382cfb955b0bd2f6fbaf7d4816ccf0987af24f082ba. 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/US4E41747002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab365f9e8590a2d214ba1f3264c1739afba949518d417a0616f14e399f5b6663. 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/US4E41747003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2652a6e86c3f94105a0986e12c0d143f6f73f31a7e3d427f7c3c68078b4def73. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:41Z), 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/US4E41524002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284558d9917e3957e6b8c835586950f068e0fff57f5e0b9bf76bff33424c36e4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US4E41524003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacd7ae7aa71bcc8394ccc0debb0b8e1691e60ae79f58ce3b4e21b4af49de77c. 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/US4E41524004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd377f4dc52ff67125eef792914cfd5ed26e42062fd5ba035463ecd993a0ad3f1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBCQV1100807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33bb8f9e88ceb2b2cc148a49f3df57d7f9507a0a0913c5bff9b195273201971. 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/GBCQV0900776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6c01c1a90da60df1e84ce1e08b1c9d01d7e2c9b2344dcc2983ecfffe97c09. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:42:37Z), 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/GBCQV0900777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d737fc60f89deb98fa7a4de649b99e95cca1615713aec2f31df13acbe862b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:31Z), 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/GBCQV0900778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e847d3ad163d9b0f43cd08558698b6e5214ecb25a62243895926576a7f6931. 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/GBCQV0900779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce02c5fb079ee8343779b75d7bfd2f5af0a6112fd6904a2d54d2552e961f1c8b. 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/GBCQV0900780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a95601e35c30c5c52ea92dc8f3537852777491648b959fd18ce5e2302ff796. 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/GBCQV0900783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb10d5b8e61f5248f042ca3bab0b3cdab7a04ffddd162996df370066dc2cde65. 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/GBCQV0900784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d9f0919a580b6b0c7be94ce64f9cad2f889666041ae0a7994cb5bd6ae1d599. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBCQV0900766.