Polvo is an American indie rock band from Chapel Hill, North Carolina. The band formed in 1990 and is fronted by guitarists/vocalists Ash Bowie and Dave Brylawski, with Steve Popson playing bass guita
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 0x533af8f3855f1f120c32876990720f8bf84586002b8e66fd9367eaf703e783d9. 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/2a45338b-a7d5-476f-8445-a4ac9434923d.json and https://artists.proofprofile.net/proofs/artist/2a45338b-a7d5-476f-8445-a4ac9434923d.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 0x37c79db49f5a1141fcec12dfa16a23072ec371ea12f4835669188eb780613511. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USMRG0325007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e12454d8392ae4496c72ffe5639c028f2f10a4bec7514ae78e7034bf59533. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:05Z), 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/USMRG0325011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0ed567ec32716f7d841642801037171ad7efa5ffb4ab43bec9df6aabd4bdde. 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/USMRG0325012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b80861218fee9ec4260b68e3f8ebdcd571d4b5a3197f2904786666943acdc3c. 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/USMRG0325013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba1709850020817a411bc64ca88084d01536e16587e2d2d4d3490e0cd0914fa. 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/USMRG0325014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8f2d120affdc8ece1cba385572c1e8f93fa1996983f35d4ae58d9906680bb1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USMRG0325015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1de14993b7354cf7c5df37b0e89d4a63d7e33e68d69cb5bfa17e495b6d5d6b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USMRG0325005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8c1bfe5eb1f3fc8a4353d1410e034b5f5cd4c8a3605a3e634c0d7a55ee2e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USMRG0325008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9423d9ae7a8ccb0b0a2bbd2b77a01c7ab663c1b1b8feccb6bfe5ca3ea28a61ce. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USMRG0325009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd291c9b73616f0cdef35abc652eee2a0b45afa165415c687d3d3c4d4dc6114. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/USMRG0325026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda9ecfab326eef1d61475994f6d9507f0b63dffeb8d4d6f04c60250800342f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:20Z), 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/USMRG0325032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3cd99cac79749e890358b9a8616500bd8f2911227e289eff6aa3f57ca4f3e7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USMRG0325033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b466eedf19cd8ffc51cdff2309bf8a17e8f149ce9f7f01074769c9825aa4c46. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:38:01Z), 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/USTG39616202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d167f55005dfb126c2a21bfa827e5584504415232815d5f2a72602d4e1d17e. 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/USTG39616204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2939e332917ed78d8b50287fb5d271db5332d2bb8bb13cd23c1e45fad7d5adee. 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/USTG39616205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3799e610933017fad2b613c5463c0eadde613761bf8afa5732910ba99ca819. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USTG39616206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2d09205a5d199cf1fb8e9fa07cfccf1ca28d3060f9d932f93ff5efdeb8fb91. 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/USTG39616207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdff661cf71e48fddee0329b8154bb66f7e0059a1923bfe2cbb2bc11a64637a0. 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/USTG39616208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ebd82653ffedc4051ecfdb5ec3967bcba010cf7b72dd629aa77681b64b1d9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USTG39616210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1779da7523f2c4c41a817e9590be8024786cf881603d63f96f69cd656a70b9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USTG39616213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9b4d34f4fcfa242de28b2c1cb7e3ac4fe397dc3c5504f695a7f4f1263da1e2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USTG39616214.
When Will You Die for the Last Time in My Dreams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e49c0d21f9fa6bc74adc90847a901cc41a32d7fe089c772be1fba34cc569cd. 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/USTG39616216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688bc8dfc5ddf0ccf5662609a5300eb5e9d07855b644297a54f32710f722a3a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:37Z), 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/USMRG1971001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1697f95a22f7e1358a8f72d6c133df9e88c094c5c16e68e3615777ab1fb30580. 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/USMRG1971002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628f085b449c30564e96d95ba90c7bac0fe0366a31087378e7ef83e624d25ea. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USMRG1971003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab7d5b5b963a4a899e8c60be43ed64d845f0cb652d451f85652d51115323956. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USMRG1971008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5986d688389f37439c0a9b63d9305c3dddb7212f961c2fb14a92210826d6a2e2. 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/USTG39717901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8838dc9f1582d853471fc4ba2c53030daef789532d9502db6ae6c0410e4c21f9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USMRG1341001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b8b9630431251264d28d1e2a4546f52519be92d838d6c155e4052389ece53d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USMRG1341003.
Freedom Of Choice: Yesterday's New Wave Hits As Performed By Today's Stars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec7f2ae78b3807b332fec4eac6c7526b813a1230682e658a9a310a42d27de5f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USCN30700216.
Old Enough to Know Better: 15 Years of Merge Records
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdfbee92ed25a7cd5c3dc8d94839a445257c556fd888da48802edcedfc47354. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USMRG0325029.
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