The Washboard Union is a Canadian country music group from Vancouver, British Columbia led by principal members David Roberts, Aaron Grain (aka Brett Ellis) and Chris Duncombe. Biography Aaron Grain
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 0x49a09233ac08335352e3136c9ac2d2ffd4d36b98f047f7cd23ed29f179b4ec50. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd1f647c-5d3d-4de3-b07b-0db35a721dee.json and https://artists.proofprofile.net/proofs/artist/cd1f647c-5d3d-4de3-b07b-0db35a721dee.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 0x5fa3550ecaea0a74654ff613e3f4014c1d1773aa2e25e9b53fce9f3b57140402. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:38Z), 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/CA6AK1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8dbeab0165d0cdf5f478046283387b569088274ad066ec3e4f6bed6941c92d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAW111800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396e6a468ecc6fbe5267d647e649980886d69f585478fc505ebabf738e4b494. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:21:37Z), 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/CAW111800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefedb2cc11b052259a1f6e392cecd20d8a4652fbf9473d6a16563ff37ede6312. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:17Z), 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/CAW111800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dc9def157406d9ef012d259113373a447d14301daef0d88b0b69919e6af2e0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CAW112000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcdddc8339d34eda30892bdf84d825cbc10c0712501cc7b416bc1fa263a4d0b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/CAW112000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f008e217cc9a8088e384d950edaba42735925c92390b3950c6fbbf78fd20bd. 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/CAW112000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1c802ae28812837a691bc6585f64f5c36f2526340f8da111ab9eecaf93c334. 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/CAW112000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2300486c95772d2bc4d8ff67fcfcdd3d1c91cae417303331b212ea52fc0a1fe2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:33Z), 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/CAW112100517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a146664b40411138cf52612b06587ab9d161b70aad0d0ead0725aab9527cb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA6AK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f95647079e84c140384c29ef9d6b00750dc1de0f99f2ecee07210256e640b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA6AK2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de41e5306fcd37c859a4407998dc6477b5e39d2d26d010e2380e14b602ef6eb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CA6AK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f95647079e84c140384c29ef9d6b00750dc1de0f99f2ecee07210256e640b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:15:47Z), 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/CA6AK2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a146664b40411138cf52612b06587ab9d161b70aad0d0ead0725aab9527cb. 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/CA6AK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de41e5306fcd37c859a4407998dc6477b5e39d2d26d010e2380e14b602ef6eb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:44Z), 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/CA6AK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a948c3548b1b6a33d6575aeefe7bf646e93dd83ec8ec05ec71455ea9a58878. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:18:22Z), 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/CA6AK2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28652a050c3e512c8a27f7872831c50ab3054baacfb302df8549bbf911d85171. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CA6AK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4dca75e2d3dedc7f1085390f06ef69d62a13b9bb911e4c92f63a70e984f698. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CA6AK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ec010fa41c5480ccadaca6452a18fee5863d062c5ab133c9b04fb28466acbd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAW111700162.
Canadian Country Music Hall of Fame: Then and Now, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcfddd1a6719d8edbf20304ae75dd03b5b2c9a8986658b411cda0fc05f943cb. 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/CAHYX1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152bfebfa848824c9247b5ee1d30f36324128f99c9a322f04a4a3c51155e52fb. 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/CAHYX1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4213f10b79ccdfedc1ba9967701ccc6208c2407c85181056580017baf26a9d1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA6AK2300001.
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