HRK may refer to: HRK (gene), a human gene Croatian kuna (ISO 4217 code) the former currency of Croatia, replaced by the euro in 2023 Haruku language (ISO 639-3 code hrk), spoken in Indonesia Heid
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 0x37775f0b69c26f48b01b9955edb70dd45a0213164b55ad57023eaefc953acdb2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e82bf59-edd5-4657-ad80-e8ada08dfcac.json and https://artists.proofprofile.net/proofs/artist/5e82bf59-edd5-4657-ad80-e8ada08dfcac.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 0xc8a54d2a4c801a1a8afce4f4fbaf1697f2ff40e1b9fff84f6b9a14f9484b77c7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZES82146886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90171c87408cb6b47ca6f67d236eed549996e657b95b461cd33d51e17e13559a. 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/QZES82146887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb227f5473c6f8c2dde555dcf81ef4412d188a42c4f4168cefa16a3d4f8f198. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZES82146888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948a670100755dc848bc58afc4ae0177e89894ae9f73e2e7c17d8e01734e231. 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/QZES82146889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4866e8cc66efff80c0c237e7382fd7f0e25e7d3f0f5a6ca419375a90a28136. 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/QZES82146890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21eda191adaefaa678fd5fe69e67fcf24ddf090a19ceefd1c0809677f21aa29. 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/QZES82146892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0000bbe5fb9b4ded276391e2b71e2ffc03211d543b4786d09c59ba3d708ee2b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES82146893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064090ac15b8836f9d0ceeca9f1070235376a73555465c631e252fd6a0b53f21. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES82146894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d21571654a167051a6b1486631b74a703fedfa4ddcd296e8e4340aa30dbde. 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/DGA0Q2438932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673209eea6d7bcd058772c1078ea0556e3c1903532b94a3c5ed934cb9262e41. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DGA0S2415105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceba060d04a7d68a721307cb1d8bca550c7a6f3ca7524dd35044c4fe3847501. 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/DGA0S2488148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f7cd4126110e2c2efab82dbaf981120295f6bcc8d7035ec05707e24910b8f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0S2488143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7699c21880dd5261e37c849193da5540abd9cc86d06e9994bc06af00e05cdb. 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/DGA0T2406604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f7cd4126110e2c2efab82dbaf981120295f6bcc8d7035ec05707e24910b8f0. 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/DGA0S2488143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c24b7bab3e26cc7a16f0123b677bb9b3a4288121ea25f316d891ff2120744. 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/DGA0T2406605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34871e501039e72f0ffa4444a4ba5119f61585b0be5e776e4cf9cad9c708facc. 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/DGA0T2406606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d40bc6a27828b444eb0dc910872f3b36bf264bd5abd60bfcd0b9c67651a840. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DGA0T2406607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54415239478f5dd4a1d889c69d32578ce8cec7678ca398933d97f88476ef2c48. 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/DGA0T2406608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f60a916dc9e4918cb9ada95724aef301c942671fab137622612c9825c51728. 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/DGA0T2406609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7a5af9711fbadffbecfa46a7319374baabc97c3efef4733273995b14356b02. 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/DGA0T2406610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441fde48013c16b51ea0131a3d0c79749b18979349a5b30a18c5e3a5ee65db27. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DGA0T2406611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f96f53b524a0c2206f15c411b945cba03a1b254b812c51902bc79f2c19066d2. 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/DGA0T2406612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe565dcdce63d07d1b1f5558e0624fd498a032521b1ae790b18c94206fc9f143d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DGA0T2406613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c85c05f650d5e236e5261d3c5ef82bab3b23c778b193546f67c6ea58ec654b5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA0T2406614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673209eea6d7bcd058772c1078ea0556e3c1903532b94a3c5ed934cb9262e41. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DGA0S2415105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47441800003e541c52af300b9bb29eb32c3cfd9a309ff264ecfc69ff19cd1b8a. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DGA0T2406615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73e5fa4d3e896e3e5106db196539b705772b204de0c07613d9c5f43122b1240. 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/DGA0T2406616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75feb9a1295769f10449926360ce9a4970fd854e3af7ef4b88595bba31ed766. 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/DGA0T2406617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8b569665b56ea36374d5d8869f5ed663c30dda34d4f42bc55f911af577e635. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA0T2406618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d21571654a167051a6b1486631b74a703fedfa4ddcd296e8e4340aa30dbde. 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/DGA0Q2438932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea84273d989b8990f2630d05d947eb4ed550aead386d9cff311bada2a63444af. 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/DGA0T2406619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0754e1c1eeba43f2d15d3c06763f2dceb95dfa27f460ce4155443842cf159630. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DGA0T2406620.