The Cardboard Swords were an American indie pop rock band from Grand Rapids, Michigan. History In early 2015, The Cardboard Swords signed to Count Your Lucky Stars Records. Not long after, they were
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 0x0204d2eac02e2e2a7bb6d787b5319b0fb538c851cbf0437a1e14bd9a8b85b1c5. 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/9ebf8491-62f6-42b9-a2b4-849a6a553953.json and https://artists.proofprofile.net/proofs/artist/9ebf8491-62f6-42b9-a2b4-849a6a553953.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Once More, There Is Nothing Left to Figure Out
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 0x01cf88ba46f3d1f1e3c6565ca8dd1484da3cc6b10249a5c82964475916efb6ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADP1814490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02438f2ad94686e543fde23be03e8bd2de1aa0325e5a04e53f1b803209f0ead. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADP1814625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a8673cecad1ead08c4058b7052418b15e6e99df81ff43ded3ba54246668a22. 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/TCADP1814628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372ad661bc12aea93292d4c9398d2962cbaab8bb5b4ae10f2fb33fbd2a1b4bb. 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/TCADP1814664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34996488c5203d5e2011e741cc27a97d87f745cbf7da92c9bd15e287eaa5087c. 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/TCADP1814665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf994abddea029a85542cc441282706536a071167deed3df45ddadcba5b245c2a. 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/TCADP1814680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba4932a4a51251e599e512de9b40252498c4703afca758558d7d1d5ab40e2ac. 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/TCADP1814681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f18fa554895e488d10dba90035ffc355638f2db722a5680b9bc401c19896b7c. 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/TCADP1814682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c588661b6bb901e7022ce30dd3dd30e5cd2eab0cb413da7f2c1fad5fa34ba. 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/TCADP1814683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d1fb9a9601c45398fbd9be5c24eb36d0442a5fd09812fab0e716fbd1671b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMQRB1500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee9c16780e5c81af1b9f560f980cd0628a99437c6cfc13124be8f0ebc73b0eb. 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/QMQRB1500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3b6c148590cdabf6ab88a69c522b849e3d8e0866391d0a37327e44d06e4b17. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMQRB1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafa555c9318df105802ee8348ba8b60ad35c29be8ef888b1fef11e753400e08. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMQRB1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2128973223a2ae43d9c814a7d481cbd9cf7d996545090a48037d77728d862f10. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMQRB1500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb16bd18c50aec18ce1cb5c95650c0d6abd72244ca22a30b172f8d78e9a865. 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/QMQRB1500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec14309de6419d074752b18ea9582aa0d0d7697220fa57f51a1292fac6f1d57. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMQRB1500034.
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 0x90b8fd21c12b902305034e4fb16afb9e2078bcb82729fd976fd037067245f057. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QMQRB1500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3432f9efc6efeb6e59f6734e4104be295c0bd08857b675f3712d821fdf42459. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMQRB1500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5594f946c8441a1bf5dd9e4f23490707e0b37e3523192eae982e68f926b46a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMQRB1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73971d8798e2fbdf2cb0eaacb132527a230bb628c3be8b54e8e142b9b5ac7f53. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAGF2204704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb0bebd987b51e763ef6014cda4bdf3e1fd92dfce1861597ec6385a5204b19d. 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/TCAGF2204710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3382c48a964863be240c5f6d1a2131c0b12368dd9ec14d4e3cfde3596edb76c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAGF2204706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f32c12998ee23313934a3233dc7c669a531e7bbdf5b2a4a3a9e67cbf5f4486f. 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/TCAFC2051882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa960e9a6a0e033ee142ee272f66acb55315939d57d6d069a88583f47ea91aa. 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/TCAFC2051886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9341e19ab0ebfac241bbd19484d14388741dcee6194b7fbac4134b5525f1c882. 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/TCAFC2051889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58152d6c94a62a9fa646345e8afa86de5c6ad75a1ebcd6b76ebe6623f033ebaa. 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/TCAFC2051884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a2103bbfc709d39ad6f879f04bd129504a593f52f1c4a84d8ad6d57a0e032. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QM99V1601402.
How I Met Your Dragon Mother - Audiotree Live Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cfc2ed2b350bcfd36df18b86dab1d1b456fa90c0ef494f4a9bbda4ca05107e. 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/QM99V1601403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d649d2a79dc3197ed304bbe605ccb3844af0e3a583c962748cdca2afdcf0162. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM99V1601401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eab68035797d3538dcb6db03152974a97467ffeb3f2fa5281a086029f7adc7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QM99V1601404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e6d3d4f82246325298e4789b8445a01f189b75079881b0fecb00a2cd6c7195. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM99V1601406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aab806e2610aa6a6a6b90a7214fad16b69f9916b2d8a45fdfc933fc5141268d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABT1438183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c663032a37c148be0247fbf500bb5e9ab631771b8ca6bff749777c4bc144f82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABT1438197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc8f47bed02b943fa580ddc99d45c691d081360157a5c2d631c1380311016f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABT1438211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05389bd76e823788ce617316c88d6aacb34b835a7db6a371441f60476d929b9a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABT1438271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f6c8cb09861fa86aeaf79b9e4d157b4bfebacce01f8714fd7735d27afd02e. 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/TCABT1438276.