The Rubberbandits were an Irish comedy hip-hop duo from Limerick. They consisted of Blindboy Boatclub (real name Dave Chambers) and Mr Chrome (sometimes Bobby Chrome; real name Bob McGlynn). During pe
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 0xd44d926a55575c9a1151201a7efb4db4c129c41342bb3152d008a4aa59f3dc46. 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/e6697710-96ff-4437-ba3a-f8a1ef674629.json and https://artists.proofprofile.net/proofs/artist/e6697710-96ff-4437-ba3a-f8a1ef674629.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 0xbc323ed5ae31cd00718307b4793da180ed846c53b71071319e86d4c3d2302927. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLFP1002741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f03f92c062ce814fa1e1c10744bae375b4123cd0214764374db90c8997806a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP1002743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059bc58acde40aef46ddc659d9eae7e0189531b0705c99190c8dca6fb80665ed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP1002744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6da967803268f93c3d256c80622e132a5111ebea1bc2dbb0cb6fdf21527a11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP1002745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ccb5e7c1d8e173c5db35c555afffededadcc69ce85e15bfd6216b7710f04d7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IEFPH1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0076d92edd18c53cc0a1d3f001dbf21b964b0a759ae0f9cdc4b5c5e2afc196. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/IEFPH1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e85d2513a5151a5f34c8b391fd27b7a4fc22c3fd8b70483835ec3e13b0adadd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/IEFPH1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4325495b4df2134ca9b48fa7510c408a54a3645db1bbbda0bdb0963cd02c16e2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IEFPH1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a885baddc563c711866e376eac4ffee706ea7cc756fb30f03fa5fe864510cf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IEFPH1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a414ad9001ef481b3d133f5e8905767c2e98788f6ea33d76f55a9bf7288afd7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IEFPH1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54b4a3155cfbb42d6857a3485d8bb75b0e97f99eac33fac8d332efd4e7d820b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/IEFPH1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28cbf5d11a92ce4f91f342d84137fc48ea647978b0bf6a7d4c266dcb0c87b58. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IEFPH1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9191fa4007fa6e0284b9f261c20be5ee743924ff4813abc1425758f93b9e91. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IEFPH1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a18941f04cd421a7b28ea31e876bc7e9e0bea0a71456519fc65b0299ce5d3f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLFP1002742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd687b34619ba8bd58f1c64a26cbc72adfe6b79b772d05eb05c2e0508c383c160. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBLFP1708679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc222ffc6305c8a98d7652b172f59931897a0fb07c631196a65fb4ffacbf6ffd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKXN21924464.