The Britannia Building Society Band & Howard Snell
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 0x985478f8a4f2a435af8918f2f3929dba4215d1370e0dda0343cb021932d327f9. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89322ad3-4f67-4d4f-a343-5f8c458b8b66.json and https://artists.proofprofile.net/proofs/artist/89322ad3-4f67-4d4f-a343-5f8c458b8b66.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 0x9754cfa2ca303f808d4a723167d63718e9638af6563560222051ce90c2753491. 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/CH6540837638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5f2d85439240e733e0fbe26b935d48d91504f72945b68f821372725740e3ab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:17:09Z), 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/CH6540837640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea55af06e1f52bc96d1c4a1755ca3f1a513eb593a1261ca96c54528bcf9ca22a. 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/CH6540837642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e8d01faa7a4cc995edc3fc79af2e9693ecf6bf6a33efff47cba63de12d6bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6540837643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f74952637a690c78ad5d267a8627721f14ab3b70e7375240d3bb009c11cc01. 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/CH6540837644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b3a2319a0407993c895b7ed4c35e8f6a88127fd02cd01209a7f51555101e19. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6540837645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab867227caeb1cef1232948759faec4b7afd1ea166ff7779958b28f9a9825222. 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/CH6540837649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df2f2780ae2515927ab7e6acee78e94916e2a52da756450734b54ff47fa488. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CH6540837650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4540ed53119933970cb938f9c6633afa4ed2811d9668029e193b2f12c6cb35. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH6540837652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d32b962ed36773e9ba8b15aa4d19bb13f1a9cfbecbaa559c4c4645454d5e99. 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/CH6540837654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28a5495217ad4e6c2f143dd9d2e7139e9666853c18068a6a579e61d7a0b708d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:35Z), 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/CH6540837656.
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 0xc89c9464861d182c06f4f2709cb7fe8a42317eba1e67fa802e642cf184719aac. 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/CH6540837639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe12507a9e45062ea6de49beb79c85fc4b0d76bdb1e34dd3c8c968710184660. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/CH6540837641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4ab1dfdea795ae82ef91bc5c6f00a6c2584c89741edd46d1f6370a41810b8e. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CH6540837647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5dc5934a60e9c87f201c8c5e8b4927a5b62464c665d927c140f1acd56ed2b8. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CH6540837651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e61a840f8a74f8eb6bd71a7976d9d67fb33b183f0b9eba9470c1c9c28598fb4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH6540837653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08892f348c927b523a906389cde1ceaee581be7b7339036fc6f093c600f8e258. 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/CH6540837655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ec75764f27597b3e9660d118f3021a6c0145ac98d04943a683c9267a0ae0b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6540837657.