The Brigantes were a tribe or confederation of Celtic Britons who dwelt in what is now Northern England during the Iron Age and Roman era. Their territory, often referred to as Brigantia, was probably
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 0x283d25ba1b94592ac390a0984901bf795ca04513733178520f24c2360ea502f7. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ff4e9ec-621a-45ca-b3b9-4e0e778acc34.json and https://artists.proofprofile.net/proofs/artist/3ff4e9ec-621a-45ca-b3b9-4e0e778acc34.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 0x22aae0e5500136187e55444ec4f2bfdd84b1bdac092b36cee4fefad8e53bf3ea. 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/QT3EZ2407557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1075fcf20ddebfa124e3f86552f4a07c03dfb5c29872f6908e903b8ddae72a. 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/QZWFN2469742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaf9f9be38d480d9059e1c990b8f96398897604228f670a73ce59e44b3f7d35. 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/QZWFN2469743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b64f156bdd5ba4927ebce4d0616688783653ea879387b7b990384811f36240. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWFN2469744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e828af6717a538cf989f59e2154929cf240f233cd73f53dc0d68cf47155ce5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWFN2469745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb20322754654327dd6367899c5a544abbc117a6c0410ef6a523aa2ae1abaae6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZWFN2469746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db22d08d82eaf7f28fc29224c6c49eedf3453baaf3293f05104689a883baaef. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZWFN2469747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d1006cd3d8ca078c32e714037c935406af750852a17cae27f056b2c25edc26. 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/QZNWQ2468993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe974eca7fd01dd1ff59fefe039338b471b2ee8a5d5471c0520caab2f696b4b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWQ2468994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588f2127eeba3e9acba8dfc4b499cda1442ae4a3b107c0471aaca64a9652b29c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZMEN2402666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425b77480c667114a8d9ed4df6197c6744cae51c6fc01d942b52ab6b89a53c4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWX2309133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd68876f04975829d0f27dc5c7dd5770c05b95c638f31956eb91cbfe551fc0cf. 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/QZNWX2309134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfe69c17734c0aba85622e9a679b382f9c6f2cec08903f0605805b2043f8dba. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWX2309135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82115008a96b2c9f6fbf4cb2bd1f31d6a1b5e8074483637f2f02856a5080f8a7. 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/QZNWV2210669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9434f02ac72e65dfeb90a554f5025c48882e4cc67a5d853d4d4a9dddb195597. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZHN62211945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb73c6bd0020bfba6855731990912fe93296fd5c88b804d086484cc86dc530. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZK6L2100669.