The Persuasions were an American a cappella group that formed in Brooklyn, New York in 1962, singing under corner streetlights and in subway corridors. Their style combined gospel, soul, early rock, a
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 0x50e3332797916953865416cff5f033a66a914c4aa7978fdf9dde46b07b6f6332. 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/300577ad-a0ff-427b-bfd2-6861ea9b265d.json and https://artists.proofprofile.net/proofs/artist/300577ad-a0ff-427b-bfd2-6861ea9b265d.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 0x1db5043fe4f085019bfeddefd88e55a0b4d15ef2146e75259160b06939c0878b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USCA29000866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3a50b3806860d35390aa9df13871d347c2b511981cbed57050315f474be09d. 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/USCA29101043.
Stardust / I Could Never Love Another (After Loving You)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46f4955533df9678349f2fe2dcc1cbb881b30b5407c6d9a54b97055f4cbd79. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USEE10100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13a9533a35fe967ab2bc46b12371a049529dc036c5c9f94809388e624aaad35. 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/USCA20706690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd004456f0bf617f075823631e79cc41db853b1cc066898509b9c64ea3805c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USCA20706682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3c74c6c88accddc577cbd98738a3f75b2d0795f55a421476f8256292da2943. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCA20706684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74191bb8966c788699f12926459b2593dc0a6753b7f360f5aa94d875e8a9627c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USEE10100101.
Ladies and Gentlemen: Barenaked Ladies & the Persuasions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36701d2410e8b6fa98ff92dbd8f8e1a895c64f34d661d36e91ec63c697b938f5. 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/CAAT11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf400fa281cff651781f80040fe09fe6c84cae0a27ae9c47f768379df8b4b532. 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/CAAT11700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71483263af360d9724c61a829f1f1f5b24ea5c59cae3839298e5041be7df9a4e. 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/CAAT11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba223b82a9661ac1148082038f143b81fab9a76120fae7506a6c328d882e5e. 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/CAAT11700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6d31aeb6fe295b4ca3e1fed2b9ce4d17074f8c5f0cc5949ea7b0ce8719e45e. 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/CAAT11700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a15a5754d8edb73d4f870bccf2ec5ab3a08ba754555ad48996f9775a40afa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAAT11700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c31d076653a94fa486868313b2a4f8328f52553174b4b86922e63d8b0eca8. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CAAT11700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b907837318855719fe399d95202b32e02c8fb5a716d1490ef6eee2920bd3be. 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/CAAT11700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a473c73cc151b6f5689b238a0137f7eeebcecf140037fa43e74baf392f3ac. 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/CAAT11700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b586d1f2ccdd07c21e71e545ea1e09d58d5db2596e0cef37d73837f9d6abb0c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAAT11700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2474972b9c18aea6231e99ae7205d0aebc08061899063cd46935378b52c169. 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/CAAT11700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a17276b0be64cdaeda491f5ce1d548aa2d13fbb1ada8cfefcdb0d47840ce5f5. 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/CAAT11700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204de957ee41f95aba129d45764266e6dc9a2af331d02409beb013f7bf26b5b6. 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/CAAT11700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b821f60f4967007d8931d9985a9f01888413db50072816f58bab2d0bb2811b8. 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/CAAT11700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b25a9052f5c93173c3861af480e829808b6eb069051cdcac49ed46068638ad. 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/CAAT11700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa31658f37835613cc0be4043be424824e96d14fcacb3e046e7983e8969e779. 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/USCA20706685.