A halberd (also called halbard or halbert) is a two-handed polearm that was in prominent use from the 13th to 16th centuries. The halberd consists of an axe blade topped with a spike mounted on a long
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 0x635929ae3a666f01180fcf1416e5cfcf01d9747e07c73d4c67480e0c20d6a888. 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/0255afd4-7d09-4f84-bf47-369cd76a40f5.json and https://artists.proofprofile.net/proofs/artist/0255afd4-7d09-4f84-bf47-369cd76a40f5.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 0x4d38d191a9309102595277b3df1b2836abced5d225ae3a27edbe27759d29a763. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:24:24Z), 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/QM42K1860459.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0926a3c0905dd5f7f1dc6feedd3adb69d73e2ef084187b906cb8c158edc694a2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM42K1974836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa20131e1c55c34f7879d746a8ba1c4dd81d038cf573e45a2d721de472ca00. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM42K1924280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca118d6aaaf363744ed73edc7afb18c664b78bfd025e7fb4257f3b974ff276fe. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:03:10Z), 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/QZMHL2401214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac3ca277347d3db1993e3de4460ce89b1dee26cf9770c01d5a6d7302a2e173f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZS642531263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4015e944b5412ff1c5a2dbd45429d09288e6485721959379341de36cfe277e71. 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/QM42K2503512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a3348d7fff1748ac3b8684868ca3dce61884f5833763a7b3dbdfd7c463e79b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZS632578395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a458e4755815682b7ddb649784151849c0527ec04ed618648302cfd4bb16b6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:17Z), 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/QZHPJ2545433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7091624ea1232404e3855515cb7d002bac8237a6092fcdab5ba184a6bc493c17. 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/QZHPJ2566182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e987785fd50d783f2d8593c4100bd1324f3a3dcb43e396f05cb79ae5d6e3a8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHPJ2568679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ded3e87b07623645ab04397577bf035ff34ca24632c95fc3c410c0df82ecfb. 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/QZANL1797723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61277088c9cc438f8af254b5ee6bb4441ef52ffe448d8bdc30a13b93df166b5. 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/QZANL1797724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3287a07b8c7aa1872cb93b47e23db014b752d2f0a48b4a66ba4636bca92222d8. 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/QZANL1797725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2116ffd3be5fea7bab766d401caa3b650663508ff42be053879d90a60b211711. 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/QZANL1797728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c88a534425606e3f6a364bbcb61c94e2b0db9ef9097091d9c45739bc555906. 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/QZANL1797729.