Haki, Hake (Old Norse: ), Haco or Aki, the brother of Hagbard, was a famous Scandinavian sea-king, in Norse mythology. He is mentioned in the 12th century Gesta Danorum and Chronicon Lethrense, and i
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 0xdce03c49444a2f33aa5a6c2b4c956259874b4385daa7b12af3c218b621bbd4f1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ffd577c-10a8-4923-b7a3-5aa6209151b1.json and https://artists.proofprofile.net/proofs/artist/1ffd577c-10a8-4923-b7a3-5aa6209151b1.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 0x7ec2753846ab5704b1cbbe1e0e199be85c65b3afe251267b6330b79b5d0105de. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEA622100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91792fe4c40e2617fceca83e24a220c4af36957ff8d53caf728b627bfe91b10f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEA622100224.
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 0x88cbfaca1441885dd47e051277e40dd747aae3d9bdc6671bd6b9c4c3f1e581e4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA622100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124f6e225591b393495bdd3bf605c592dc85c4507c6706ebacb3a18cd10ea5f8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEA622100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03020f8eb561ea2f1a954841fd2a57ea521e052292b6b965178df2d7d19ff632. 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/DEZC62376931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca291fed358cce72d30d1b8f8bb6dc713548966d1100fbab37e60719e496232b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62437873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865607500f2a559391a261c698dc97045a328f7de5af82997944d7cd8f215d65. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA622100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd545863424e91b8b5d3e34fc1b51a0b605788d18c416e4c01ae5d5bf6437e12b. 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/DEZC62444240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca291fed358cce72d30d1b8f8bb6dc713548966d1100fbab37e60719e496232b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62437873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d895738c5960e86e8717ead0b92e1d812406189533565c759e35f5e63485afb. 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/DEZC62405148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03020f8eb561ea2f1a954841fd2a57ea521e052292b6b965178df2d7d19ff632. 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/DEZC62376931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081863be801a3bb4d366bc964f84ff033124e07e013b0a0f1852630c7f14c219. 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/DEZC62331352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed3b4acb76292a13f2f742b11fe6bbe3a6ae4450e00c7f608b94731abec656d. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEZC62298767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7233eadee810fd0eef0388ab1acb7f022c8232598ee014687d843145a04f7e1c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812231247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6448c1a734b0918b0620502a67ad3f33f9964f0d32120dc96c870d30a7db2f. 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/DELJ81938338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51eaeaf0c24d3ac228d5ee1c2e4d6d8086273718274bc73be3325ff05c60fff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX201794848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0158a815201b0600f3e8d05474f0b25477af3e263fc10e67a297d93a8e42c50c. 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/FRX281702319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c0e7b79837b58dc74e8eb5180e1f7b94714085192b675e39e5a70abd300150. 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/FRX281702321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a9178d36c9e67450acb4919c93bf8bf7730cee88c4b6ebdca0a9ce0aebe05d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX281702327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6f1696c92d71e028a759483d52f75045321b8b714b67e4bf1fd08f7a8f5762. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DELJ81938932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad21cb6a157c81707d1798d78090bb0e6913e060f27587d5867baf818a12ccd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX281702322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2f3b00a51cf0b9a655858c0b02fb6c1372ea802fb131cce266e9f0d5d6e92. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX281702324.