A larum is an alarm signal "to arms!" from Old Italian all'arme A Larum for London or The Siege of Antwerp, play 1602 A Larum (album) See also Mater Larum Mother of the Lares
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 0x82b2f7ae51c13a62e1e292a9ae548a1f4e06b6db86eb886164949b62a0788c75. 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/10dac2e5-ce55-42b7-a10f-ff3e8d1edd86.json and https://artists.proofprofile.net/proofs/artist/10dac2e5-ce55-42b7-a10f-ff3e8d1edd86.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 0x7dc32df24aa8e7c64c34e384cb175a6140e217abfbd3ab40ede56346770e2aae. 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/PL20I2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de3889281e64e29e9dc7439b1b9785fc760bd91acfe9bb23c1088d3cd0d6604. 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/PL20I2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc32df24aa8e7c64c34e384cb175a6140e217abfbd3ab40ede56346770e2aae. 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/PL20I2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d868ee4b7af37b1598de41f31d102089728e8240523010601fe7a56b76f5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL20I2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac97d305595575ad6337f7c909dc660791c1af34af73289d369a941bd1f03be. 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/PL20I2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221d6f1c59136f791356631fb5527b22bfa8056c977139e35c9e0b6dff7c0096. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL20I2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500024e71bc2954ddd00fa3f63f81cd2b69cd41c7dbc3a8d8936306f92420098. 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/PL20I2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ff9a6abaf00095e147573de7f365222ae8233a36668bea76749ac02e3838b. 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/PL20I2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d3bde3078a3adc03cf1c4c8e4ddba219529e9745a1a42f906acdaaa525ed73. 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/PL20I2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50487e03c798061f40a4c5942bbfb99b8944f6a0765eb1c331931a603f33f0de. 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/PL20I2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82335360a53418eb7cee7a005188bac39dbc132351fba16a209d4f376271a8d1. 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/PL20I2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d88183cec69a95177207c2661ff8795a123477a675f0a9c6ceec443fdbf1c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL20I2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71b6e7e7647a6f1fbde274c4a578a39db71a2c8250be5bf7b0ba266aef014a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL20I2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50487e03c798061f40a4c5942bbfb99b8944f6a0765eb1c331931a603f33f0de. 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/PL20I2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d5cfe2819e62bb7d0fdf5f0fc53bbff4e5940a9378eca2b2d5d3e9b678b206. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/PL20I2100020.