Clara Christensen (born October 15, 1996), known professionally as Cobrah (formerly stylized in all caps), is a Swedish singer, songwriter and record producer. Prior to releasing music, COBRAH worked
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca19b6221d7a2399131cbcc1c2ad053e45b64baa46e2ad2c2616c8424d137ec3. 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/e673c5be-266a-483a-be70-4511ae015a32.json and https://artists.proofprofile.net/proofs/artist/e673c5be-266a-483a-be70-4511ae015a32.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202e1e5a85ededdcf4b7e5509939653f273a94be886ff52aa878fa96c7bc54b3. 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/USAT22309525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202e1e5a85ededdcf4b7e5509939653f273a94be886ff52aa878fa96c7bc54b3. 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/USAT22309525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e151fc30c12cde8df8fdb59aa879a5b2e8087c181cc3dfb1cef3f5856078d. 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/USAT22309526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edbf665695b2a7a876611aee3cf3810865f8b40b3365e99be2e1d7d3a375635. 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/USAT22309524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d33fff412657f80e1fa8ba4e6ce583c06acc8e7ae55b715ccd78d769f39289c. 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/USAT22309523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb5fdd709a67d521f609a80276adfe35e04834e8729d932563632d4eda44b5. 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/USAT22307043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662ba97303155daaa4097083051bc55d1ef395bb6dbb50c1b4575918829011dd. 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/USAT22305469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd9746691a7fa52aaa3d2505f2195b1ccfa526f8895133e1ecaea3e4b2c8e5. 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/CA5KR2261885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f33aac9778dffc7b792bcf9f8ecf388e062667f591c6b1ac2613f0788baa7f. 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/QZAKB2167629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc943ce616897d4139bf9e2e78f6a670c5af96ae82edf54ee9e7cf97e332af4a1. 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/QZAKB2158412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83c87b2f4b402d450944d126ed06bb6b43191216fef013c0ff1068b1122e5a. 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/SE6AJ2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad68edae6dc935fe5a1e74a7e3d7c8cb5a2a84937c506b53696b62fe43c9e3d. 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/SE6AJ2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca136b2bb5cc085114617476247c6ccf5e651d279f616c199b2d68206b911654. 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/SE6AJ2100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c948e80820403c4c87481a5e23ba13a5189aad11e072685ea69098361c917. 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/SE6AJ2100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6631bfcb98816966e75ac67947b44c5b5cb214696e8a24b71409981f507dddd5. 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/SE6AJ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83c87b2f4b402d450944d126ed06bb6b43191216fef013c0ff1068b1122e5a. 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/SE6AJ2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6631bfcb98816966e75ac67947b44c5b5cb214696e8a24b71409981f507dddd5. 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/SE6AJ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fe092a672719d6d05cf05f97659af6c6c6085e4a089695d295b45e26531142. 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/GBQGW1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc10bf9794dc3f798bd22dfbae7002a6c103bf95f24bf9d568e8c777190b3d10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6AJ1900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b0f5e4abb992b6ff142f8fca1fc7b7e44aca4f3853029cab4094f5adab946e. 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/SE6AJ1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2eb2166173a5da3ba327c27fd9ae06b287d1e81dddf21d2e4b8ac3a5d98474. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6AJ1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2babe567c0db18dd18b9988c8b09c7a11fe6769c821515c22e56691e7fb58ff. 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/SE6AJ1900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4f62548d7ca9cd4a868bf1b0f1b0896ac66c6ad89296a716e78eb103979196. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6AJ1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b0f5e4abb992b6ff142f8fca1fc7b7e44aca4f3853029cab4094f5adab946e. 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/SE6AJ1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2eb2166173a5da3ba327c27fd9ae06b287d1e81dddf21d2e4b8ac3a5d98474. 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/SE6AJ1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4f62548d7ca9cd4a868bf1b0f1b0896ac66c6ad89296a716e78eb103979196. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6AJ1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477617aaa74e5bef45db3525d24be7c54235c3635a4a932c33d87ad8ed4b373a. 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/USAT22404878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ce17d1a27749890b2a9fddc354993c83422023e9e1dfa2fda4cc17995cf9f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAT22406121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0061b98e09b869f87ad499664d346ab84b4bc6aa0779174e1802d5dc3544385. 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/USAT22406452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c4d3580812ce788f7d7283d4d2b93058f47d85cb38a10577d12b8f39ec7091. 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/USAT22406455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f30fd093e6f5321201744440f8af38cf02ba283ce594b0eacabafb390cb9228. 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/USAT22406456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096ac589b40753fbafe77aa784f59d06af905548bd293dab83875fde4efcf2d1. 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/CA5KR2296935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd9746691a7fa52aaa3d2505f2195b1ccfa526f8895133e1ecaea3e4b2c8e5. 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/CA5KR2261885.