Dark Sarah is a Finnish symphonic metal band formed by Heidi Parviainen after her departure from Amberian Dawn in 2012. Their style has been described as "cinematic metal". History Formation and B
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 0x1cc14759dc048d5b28b7926dbdef444306f82c0bd59e83c78659b6fb8d931a8a. 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/4a9b8425-ee11-40c7-bb43-e84d6e56e64c.json and https://artists.proofprofile.net/proofs/artist/4a9b8425-ee11-40c7-bb43-e84d6e56e64c.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 0x4f68d556c3b3970cc607ba1077faa26e49cb865d3754da2656ca61b76c37cb68. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FID2C1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5b0a94638f1fd0bc7ccbdc785b97a99e55d9b2b66da1e7ef0fc858ecc7970a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:47Z), 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/FID2C1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b45396dbbb9b413aa0f373b41e2266ae139e6b6500cf25ee54a8d402023ed4e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FID2C1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b574bec2884fe7195dc8d607dc8deb5e01be49a6b0b28074fefa96f06b82dc. 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/FID2C1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bbcfca81a8d76470df91d87234009b94781dba7e069c74cc7f11c6d4d86fe5. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FID2C1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda5be81700595a9c84641ec82192e477c94a62c221d8a4e670de1be9820834. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FID2C1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878e0baaf117d8a5cfa737d796458789752d02b1cfcb10b30762f0f71d8a3c64. 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/FID2C1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ced1556e73afcf304404116a5e039b8c9a79ffa79d0f3924bc61ee9ce73bc70. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FID2C1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2538297189236aaecf9de267ee6c2008cad5b07728bf7c09c56db7e6e4842c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FID2C1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd33d1fe2bfbe3c760ee5677161ed6d26249a65c3d5c5df9655dde8a7bbb2fcd. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FID2C1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3156606c0ad5c036a316d76020a1908336306d321e5a8a4973c88e19bea74a6. 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/FID2C1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0d718625db488e2518c164449d564e65ad046a551074e16764c64a430e524b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FID2C1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b76e76f89df572c94304ae2a17f7aa53e7d2eeeb57b9dc91fa60a865c42325. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FID2C1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a83d069dc5fd58f8aa5fef418918c7ddf69d51d20b8c98ac1829ab3f31f9424. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FID2C1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab37c0a4074eef595b6d14bf82c2210c8c9b6a54c485321042571658908c9397. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:37:53Z), 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/ATN262095602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3fae0f808c99b7879c65ed0dcf47f33805edb421666de3fd47de09a906c9ed. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/ATN262095607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425bc5debabaf69aff51a3735125ccafa6bfefc3d10a44a8c2fbe99c79a6275. 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/ATN262095611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67447ee72e00d4a37b793d6e0d25d5270fc5ff4b858e51083d6dad40f40dcc7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FID2C2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987a02d4e5144c31db86eaf0bf7e2c9d7c4a2101f3c23fd13d08086e31fad4dd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:32Z), 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/FID2C2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aad3a0a9a04a3f55b259cfb47081a8272afc502dddefad3920ef527f08c038b. 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/FID2C2200009.