thumb|Brushy One String in 2015 Andrew Anthony Chin, better known by the stage name Brushy One String, is a Jamaican reggae singer and bassist. He performs with a guitar that only has one string. A v
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 0xe33b84ac4b6d91db9efdb78db8837caf67d74b9b1047aa9ce8bfcf30193aae61. 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/b24ede38-f5e7-40d0-a8ee-5201bd561548.json and https://artists.proofprofile.net/proofs/artist/b24ede38-f5e7-40d0-a8ee-5201bd561548.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 0xb1b2cbc3118f7c840573f5d86adea4184be437955ab259ae5508e241bdb8636e. 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/QMHN21900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe36005ae5b7c310e89712c737fecdd158bca829ef8506b8ce79c985ce7e8059. 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/QMHN21900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa167a47780b56894ea1bfea6a0d7654797d4194ad281c3ea008bd77829374cdb. 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/QMHN21900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86e2cb5d1be95b06e291a0b5e7a7a302e591ee16ce410ca0e209b83bd4901b. 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/QMHN21900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca405b48884bbbdacf8d83004c57f0f804ded0d0f07e2f09032bcdfce5d6220. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMHN21900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0f1c68114d74087e1972ea9e5e140709cf73230c310aedfd4cf82267af9161. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMHN21900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c36025b51c9635603e92a6ddcf174732b6a26eb7e8fe1b7ee3c8790c5e8b64f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMHN21800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31763fd3bddee3934af36e6ded41d1255096c7c4c36c0aee933cec0b4c91b58a. 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/QMHN21900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c5cfe7fe1d9769d3f6f54e1ffb57b323cfbc90d0ea112f6fa2acbf9e4af53f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMHN21900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec4c860c4b8d24260cdd9ddaba60bb20fe9c431d1f659880259430c8ca5e369. 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/QMHN21900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94adfc360af6bfedb5fdda24a12166c5e30daed9fac0236d14ce525c01b800ac. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMHN21900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17c26e19fb3dc8845669fd9582b653c2144cbb1626090c682aec8d94222f04. 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/QMHN21900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc91269719a469847491c90d206a12ac3fc45886583d44e4f8d60595d70e185. 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/QMHN21900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07b68a8316713e29f020eb2e5b2c7eaa056c9b0a5a542377d2fa2e57802610c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMHN21900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7286444e322ee544014a9f4b7007eb050671ab8548719f6485731763c483963d. 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/QMHN21900015.
Oh Mama (feat. Brushy One String) - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5aa0cbd14920097f0dae8cbd8700a391adcb3a859b9f5cd29a394a415bcb55. 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/GBCPZ1814811.