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 0xa1d88b623cfb49b0fe56891a69924c9142a6a44256d2ef8acdd0791cd3183a20. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3979d41c-1649-4468-8d21-8aa010be45a3.json and https://artists.proofprofile.net/proofs/artist/3979d41c-1649-4468-8d21-8aa010be45a3.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 0xad23c17a1cb18f518bc265951f78cf86dd44298b3b0a431fb5a239c63757c381. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPI291312820.
50 Tunes of Horn Jazz from Venus Records - これがヴィーナス・ホーン・ジャズだ！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8ba959f4b2437d488456c40c38b3d4a0244faa59ce1e4739ff1db54523255c. 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/JPI291065901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761701e24b76e4d07cca8d74fbce9a3f5c5b5cd1da70f788f397e60100e05672. 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/DEA892100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bd6f0680c801eb1f8447264e1154c0105f750dd5867f9e3c15a4e8a6207653. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEA892100326.
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 0xfda936845e46e0c5b86d84ec21c6750b0945bd7144027301e4cef231dceeebce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCAL2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269750607764b76d7fd3d21aebc408e3657a4fcee0137ee151ef7c14fb34e3ed. 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/QMCAL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799265ff9287364970f04812829337295df2d416abc389d9d98a312c8fd92da7. 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/QMCAL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a70b92853fdf6b7b60099d6d084f3f1038bf13d76f02121132e553c6ecd51b8. 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/QMCAL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661d603d8405088feccad6b78bfb3b38a697c0b6c9637e4f5efa3928f969c3dd. 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/QMCAL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66057736343b340bf3b25fe2743533bbec2fa8471dbc05750042e3d5db1c2a1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QMCAL2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2180aaf52a7019ca06ad6dd0a57baae0acf0654fe79126ea3fc3a917887fa5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USFI86800335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464ec981b05ea6317c4906641a5d16bf5db95387a864af50193696b4285330e7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USFI86800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a14c6f22664b31f7907e8326e3edeae651b773f288c3091b212ad52fbd02dca. 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/USTR80302552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625780262d49acf1e6222c2fbb402a7a98840536d0b9fd0c4473d8ae5277f814. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLA410814558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1277fdfbdae1e2393e20c76aa64502033ca538d3cb2bf589013de10b4e46919. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLA410814553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641061c4944b33959dd6f6fe865f8c370ccbaf3ceb7eeebba2a6a5ceefb64089. 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/USFI86600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7486e784f45075d8e557186f4e6dd2b6eb7b286e1b7671552dda16105a056f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USFI86600273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f914a8b22a40619751387144f39e4ef73afa053d3992cae7e18a708b1de0224. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USFI86600275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43254239fe439985899a51964df4e1734b15f0616b14a06371f4df8715bc2e06. 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/USFI86600272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af60b267d91ab2a75c7cb8b7c8fe371a72d57c18ab23405c973dae188c36607. 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/USFI86500343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4050107bdb79ec95c17a34d3c25c0b899a0495a5e797bd097ed10625ead5f83. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USFI86500344.
Barry Harris. Quintet & Solo. Newer than New + Listen to Barry Harris... Solo Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7772b8ad90b286f2b9328f3a6cf3fd3216db65a44ee9b108bfa6c9e1dd11c7f. 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/QMFMG1396859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cea8192c6d23dba201a4e081acff21ae699fd82c668e2b09f55a1f656fd9de. 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/GBCWU1002813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c11f68bb0fae770224bfe9314bd386dfef9dda371751fb196eb75613c5eb8e6. 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/GBCWU1002816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d00fd01792dd9d5377c205cb32db7f2398d7a5b9a406f40f560e86518017292. 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/GBCWU1002817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dedacf6d9e6c78de5ca7724d2b4618b235cefe451e690a12c99c8f560137835. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBCWU1002812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6413800a161ae9aae73dd95008466c3f0f817a335c0f8b023cf61de0e05c9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBCWU1002814.
Pu**y Cat Dues - The Music of Charles Mingus