The Polyphonic Spree is an American choral indie rock band from Dallas, Texas, formed in 2000 by singer and songwriter Tim DeLaughter, formerly of Tripping Daisy. The band's pop and rock songs are aug
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 0x26030a96ddfa4d242f5d3476de87e545cb89f566d97c0d328bc10a21a2d1eb80. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47b87a00-f23e-41bb-85b1-72e29857fb1b.json and https://artists.proofprofile.net/proofs/artist/47b87a00-f23e-41bb-85b1-72e29857fb1b.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 0xd2a2aa9173367bdb712b65af38edfecac9a65426f395c8cb0c5357ab8e6dd90e. 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/USA2B1302441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7702a023a686b6dc7928080ef899809544651d09b7ba750c76ceb14b1a5b31. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:51Z), 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/USA2B1302442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077d557633933bba8cf2f1b7fe43f3ae1a6e999af6031dc47e25a82032ee4c35. 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/USA2B1302443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ac695a7befc7e820bf9f0554337b98f5fe2e2eb75c853fb2003b9cbe251864. 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/USA2B1302447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349dfe3343bd83b6b4bb2d2d391b1b9082993e6349642996a7a7969195718669. 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/USA370399647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bfc07a103a08edf631dc22e79228cfedb47e09495f8cc84784afdb679c272. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GBFFS0200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09036f261f2b34e41c9472c1383e73e23f10aa44a26c9d97d598078789a4433. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:31:19Z), 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/GBFFS0200138.
The Beginning Stages Of The Polyphonic Spree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc502123afd49b98fffe728280d8c4ea3dec1ab0f3c8d490516e0ae83f024f1d0. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QMDE81400004.
Section 11 (A Long Day Continues / We Sound Amazed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0f49a536a008ae051b739881b2a674a4756dd0f25abb0b559e8255d577a146. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBHFC0400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe050dfa4d711ebe49b8a731c0e2be263104c358cf2b5e1fdbb36728d567eb3a7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBHFC0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b49cb86a492cb19e9ae09a40223cc8b3499b7a397f697efa83f3947e833b46c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBHFC0400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf637e0a102b30ba0c442a047acfe36fa9d612c0a735ac41b773c57778b40717. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBHFC0400070.
Austin City Limits: Polyphonic Spree - Live from Austin TX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3517ea0de7234eeacc85fdd15aca00619fb77f181aa305e2e63595f0a7ea2c74. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USA2B1302452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5060de54b2bb3c77b6b1cd6c8a41e26ed5f0d859f90c8ab75457fa4d51ea14ec. 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/USA2B1302456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac7471edcb6c35fec2a4b100a8b29ca91d3fd7d0578b237b268b4c7b686c506. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/USA2B0739302.
Live at Lollapalooza 2007: The Polyphonic Spree
Holidaydream: Sounds of the Holidays Vol. One
Holidaydream: Sounds of the Holidays, Vol. One
Songs from the Rocky Horror Picture Show Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb8ef197c57836806b15f8a1088b5b081bfb5738aaea0e77cd8c766a4f445e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QMB622310601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee4bba303f674b9a13cbc3e1f45572b9e8f13a7c417b529c040f0dcc3a92084. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:22Z), 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/QMB622310602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c171fc856b76472cb554c7225900fe22082e504bcffadaf67175eba9882cff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMB622310603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9474403c4f6ae502b422419dcfb0e115911edf79c060bfa04e1c79ffef9c4f44. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMB622310604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e864960e704ab5dfc0adbd653ee5f0f5e3cfd16f202970f89fe48f06b08df0b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMB622310605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26153fe285e5447333887732344b9f7b1dc59dcff9f065cdc0f1e32630746a8e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMB622310606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c592673b6414d7350de4e3729386bd8726c4fa9c45d6b4188267d7ec1a86866. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QMB622310607.
Section 52 (Morning Sun, I Built The Stairs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66450fad15105a13be4bbe92fa986302cf5e84a9f45b40753c095348fa6670. 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/QMB622310609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf0e855791f24a1ad54d1410ce6c8373a4f6473045f460fa68ff2137774e92. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBFFS0200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c91e79d75c928527849a82bf7b3b7be77fa8465890fe6edb9a6e32639820fc1. 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/USWD10834841.
The Jack 2 Pack (The Nightmare Before Christmas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d6336919e946447641b1f0bf025223387bf260d2825a72b10c57299d4fa44b. 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/USWD10834696.
More Than This - The Polyphonic Spree Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1347b404d57c295e2b464f72616d4825d43cd0235b025f5698cd5ae722630044. 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/GBCPB1901923.
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 0x10fb82e2293919507019080883f21bd05feb00b4fc79ac96628277c233a9131f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USKO10702857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ca8405a47a246f7bb084535cdb46d23a81c5bac68fa56a18c4545932198bb. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USCN30600141.