Eru or ERU may refer to: People Eru (singer) (born 1983), Korean singer Eru Kapa-Kingi (born 1996), New Zealand Māori activist Eru Potaka-Dewes (1939–2009), New Zealand actor Syd Eru (born 1971), New
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 0x5ca0a7fa0e6fb840d2bf556b948e8219efe4553f1e80ce9b2ef5c7cbe32ea08b. 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/503e39ab-e34a-4760-8515-8977d4ede158.json and https://artists.proofprofile.net/proofs/artist/503e39ab-e34a-4760-8515-8977d4ede158.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 0xb5b9fa76934ae78e52987a338ec4d4c1e5acf60a96ef87c173304a8820e57c27. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZNWT2248005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7891ab804835a140871127c31abb8d6bba6c9165fab9694fc6ea770b9712ad09. 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/QZES62219250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605386a313c2e787fa251b47b3ce3141911bd79c655eadafe4144cdb8307f19. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN92291808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9185b3d5cc1080b078de4021693f7ac574b3c69efbf8def59dbacd541cce4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN92291809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b40977276fa0976a97476f4fc3a1061375f8d8328db1858a162825c0e75e18. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZHN92291811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e48db99b636b98618c8578b7a1d46876948d16d77ecbf94685f4119d7b7a5. 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/QZHN92291810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f055f63f989fed53d949b549d1e04015d0124f38a69397c43a6a85925dae0. 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/QZES92194565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357ef614ff34cae916d5632db75e9a80665ac3e87a25decf422777c876771a1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZHN92291812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605386a313c2e787fa251b47b3ce3141911bd79c655eadafe4144cdb8307f19. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN92291808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49949c1a1dd6e56591af6d9bd816c7bb4e03d8ab9715cd87b31a4e33bf9d9bc8. 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/QZTB42299376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca454747bf0310aa980b92efef39998b55dfc8a26ee66da0c16309c2767c74. 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/QM4TX2332645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca454747bf0310aa980b92efef39998b55dfc8a26ee66da0c16309c2767c74. 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/QM4TX2332645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2da792f100866078db4a8a4ac0aec5f1b35e89dec599a26e0c4039e802d8b42. 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/QMDA72338567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe10dcb0b7f103aa390cc20c79d426f92dfbde55580addfe9d6a81c93fb73ac9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QMFMG2361427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e03b5685315ecdb26e9f164264c3aeeb3aa35ee6cc985cd97d41732416a8bf. 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/QM4TW2408314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231dd2a51f0acd9ce7c0cddf654bebcb569f4408ae827919a83cb09f842c605. 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/QM4TW2412527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231dd2a51f0acd9ce7c0cddf654bebcb569f4408ae827919a83cb09f842c605. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2412527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade75724f019db7203277a52cc06eb75f14e3f43cfe72e05fcf5ef142a6a034. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QM6MZ2466741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ceaccd6df62a49ee52789674c3277b447762837352b20af5e93bd38a74b8ec. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TX2487934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c31e7a78039fae9ec8c132d85f85132ea65b818f70677a4cfd7a2923435127. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM6N22419264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15323d16cb3de68e79e293d408b1e6062b485e1986a1b027101823283de3b3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM6N22419263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469370a71e3fe3ed58618d43c1f71e05814bf7e8908efa504919889a3f2b04dd. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM6N22419283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2ef33f4e0bddae6dcd8dc795384eacd8eb0f9b46d9d40961d4b394017e439. 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/QM4TX2487980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02070a007a85ae94f8e037fa4a6cd06c14e37d37607ddd9deb80e9b859c1b6a1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QM4TW2531485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f1d3145f77896f93405d4e9c4a21118e5b617d80095e583fee2034d5519a70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2558586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a33107c078053c6dba737652a12d708e11c07a6ac97dc02bb900c28dfa95970. 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/QM7282411471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064da42c634bff22e35708c85d8c7110dec0adbcdd690640367a736fdd687b3c. 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/QM6N22597105.