Ferrum can refer to: Iron, for which ferrum is the Latin term and the source of its chemical symbol Fe. Ferrum, Virginia Ferrum College, in Ferrum, Virginia Ferrum 49, Polish locomotive class Ferrum
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 0x7a5b22619056fc4b1a79e2fcc9455ad21b98048a2fb82edf63d7b0f9b54b5922. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec679d60-f04b-4c1e-9e2b-393999d90c07.json and https://artists.proofprofile.net/proofs/artist/ec679d60-f04b-4c1e-9e2b-393999d90c07.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 0xc9b54144da480239c319885c45b250402c387955bf4a51c09afd04fa7b590832. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:21:46Z), 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/LVA109700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3e93482415119ae9a966ed79b0ce48cb6e6ee04b80a1df818d32cdb83da2c6. 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/QM6P41401082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f4cefbbb49190e7f624263d3b37c70e7400b5804b265fcaf0395260edbd0b. 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/LVA100800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53e014b52e6c13ef74af5a3e92ac3626fc5aee2e48a8efb6330391b8e1d667d. 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/QM6P41401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03be83384bc970fb1570430c23da152f6324ac4d943780a45f3ebe33ceb7138f. 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/QM6P41401084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7008b3bd3d2a55fae90b5d44f439ade3dcd18ff1b7cc17bc5387fd8430117aa. 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/LVA109600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278af0c8328a340650c4752b966e7b2d02ea2e0a1507e9a0cbc983418f5d7fbf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/LVA100600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf46a3019c067b8c89730f1ddd6c61034acdf6f661863112e2f5b2cc68988f34. 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/QM6P41401085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30695c1a7e5635874555e4eaa5e9807f2ad11839b3d7c7fb69641d6621605566. 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/QM6P41401086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294b11681da2224138d1140dd8d53157710e5d2e3aca6fb79c52e11deaee9b60. 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/QM6P41401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc4493baa79a18fdba3bee07994f6844b9bf6cf4187b31bf2110f621f8fad55. 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/QM6P41401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c410eb8a22f1737bb379bee2ded49ccbc4cd0b183550862492fe1b8ed160079. 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/LVA109600155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bf17d9052106f98d9386a729b9ee81efcbe79657045b8b48fc337eadcd2fac. 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/QM6P41401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d90b29d599a58d3c19f9e2a460bbb41d6bbe09ca035bd378f3194ff656880f. 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/QM6P41401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d38e10a4f550cbffed353a48024d08b16585120152049968ed4e4a089bb4f5. 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/QM6P41401091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666281624ae8b6739a6302992151826ddfdf3a692811d2961400cb29cd4a192a. 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/QM6P41401094.