Quarterflash (previously stylized as QuarterFlash) was an American rock group formed in 1980 in Portland, Oregon. The band was originally made up of lead vocalist and saxophonist Orinda Sue "Rindy" Ro
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 0x2d729d70be3a9c9edc1ff59693bbbb1036892805fb0be4f3834f2bf57105090d. 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/9b209d91-5314-4057-be73-a0a8866deea6.json and https://artists.proofprofile.net/proofs/artist/9b209d91-5314-4057-be73-a0a8866deea6.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 0x7b33d6733b6be6ccfb6fc2155b2a00fa71fa7ca61c600ff95606f92002b8703f. 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/USP3T1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85245b498fc222df7ecc097e19198fc28da533b095b6f6003ad603b715726a2f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USP3T1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38243a7c6026122ee254c12bacbb49f55226e6ee06879b75cbf86b4953a794fb. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USP3T1300001.
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 0x60a976e17e136fac25b41da42d4eb034e342ab3b8bd10a8bdab5df57f79eed02. 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/USP3T1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311986e30dbe058faf66ae51f3c88c32ff2ee696a93abc95f13ad5ded33d2920. 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/USP3T1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638993316816ca24bf5a150d80297d1cc7ed8d01d44077c0affe6ddf70e0c3b0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USP3T1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e2565f22be7f23b4435357274a8c985165df54143249c6dfdb71a472650990. 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/USP3T1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ca5e77816b1f9fd3efb028be75af069d25e07b89dd8ac344671f092fbf75b5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USP3T1300007.
Little Miracles ( The Songs Rained Down)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed809b5730763755731b520435022bfe82113314bdbd603ccaf0e3c45620f1de. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USP3T1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c0f8a06c74ab019ab51d3ae1ac050d5dd4faaa00e45bfdec3cdf13e83cb2ce. 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/USGF18507801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344cd4c88ef47ca5e318b6795e35b13c5162efc4fd10c25966c559aac10dea49. 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/USGF18507802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee4972fa508e507ac14bef21702ce1fbd744481af1ce2d5b8b1b00048dd507b. 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/USGF18507803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819c9987be26316a96eb3f294dc9d4fc6470432d73f2a4695e89d2dad6cf000. 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/USGF18507804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92376779688b2ec262b3bfdbc920f788db51b13b248fd32b1f47caa698448d98. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:33Z), 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/USGF18507805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7ae774084ab5611b310539424e05aa72ab53ee5f8885dc2b25c065aa04c4bd. 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/USGF18507806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c4ce810aa7332501bf72dac1c7e3b144c42629968c7bc1f45c95ed84c5a265. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGF18507807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d8bf56e75b4c20edfe0691534a0a44ae9e7f86dcf053b5966383d67c18e4b. 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/USGF18507808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbc6a49d8eed587b77d4668702d3d3689b7b11f7bceb9d63aa7772937cf4d2f. 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/USGF18507810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac07cc18ad476d71211c3cd3301457eea0f435cdfa1dbe7a5a161570989ffda6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USGF18507809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e362b2299d1310d5b42c2e97684fd7a4613b34bd6dd9b04374be219e2b88fe4. 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/USGF18301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd30057dcbbd5b5daef02edfd2e553f65a0763cf92d84c2f8ba7b3fd31cc66. 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/USGF18301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0b29c2d3c47f74331c14a6fabf3c2b2c378617eb4eab33f7ff1df9f755e2a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:42Z), 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/USGF18301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916fb20911d932aab2d902918487dcd97aa1ea327022ffd2dda6181705ba2760. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:18:26Z), 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/USGF18301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f9c51ea755a61a3a35ce6e5399c892f9e6a825de7f5623e1a4fe2c1d17a48b. 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/USGF18301109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0ac41614700082c4ef90bd01b0d907e326bc9dd5bf3e1580434c0b6a572c0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USGF18301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffe743b8e7357fc9af97d5e05b75ea0e8fb22af35c8ff7065fc4bf6e0528bf2. 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/USGF18301106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63e15be84207f7e1a890efee7be72fed4c9f8c82bfee96a3cfbff34f54e7ae. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USGF18301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2607401db1ab1190751c748a2856a8a3313867a392ed9e4101f3d1b4b59cd2. 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/USGF18100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1afbb1d018432c39916c5d1d90eee64bdcbe673ab59bc69c67a8aa029f39900. 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/USGF18100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45234212fce64aac5c889ade7802a5e10309cc3a404b26901d594dfde27ee571. 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/USGF18100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b69ffed83a78ef6e7520420bf9ed4137f17a2e6450ac38524fd1e722480fbf. 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/USGF18100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935241f7d805639737af95ef31b5766eaa4edb4daf36c8600eba756b2bd1a882. 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/USIR10110117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc2553b628d3585385f10344cf06a7e25b12a570417708b934d48465bbb8d4. 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/USGF18100306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f8dff6d1f8f1fc2e6e57cf758c7f2bc5ae92792c4899b185eead2a4f887a8e. 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/USGF18100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0378bd0cec72964ce081f70d0eab89cd772009e331a853d5f383979cf3c76cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:25Z), 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/USGF18100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f4614639423a8f6f2002aa2ad246b9d16a0658eac8144f1257f6a10ed1b3c. 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/USGF18100309.