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 0x18b3a610884c74cedcb01690da342f52245df499747002f8846c4f7e9ca1957c. 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/3542dcfd-5e36-4941-a076-ca24be1c4876.json and https://artists.proofprofile.net/proofs/artist/3542dcfd-5e36-4941-a076-ca24be1c4876.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xdff172a9e0c66543649872f81b15ff853287faa2d31404f81afbe143945c7897. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACY1734465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513b7bd328c5be20fd712bbb2de9bd205eeac84be9f5babb599b84ebdb3b03df. 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/TCACY1734849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade619e217eb8ce3a642bc793776db2742d642122bbbb619dec68be9e70ba57d. 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/TCACY1734887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77feaaed417372952ad1c4458d9e837fe173218f24ec45d1ee6b2e2cfc3a0bf7. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TCACY1734893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15beb75512fae08e0b7bbaa73f3dd9267d14c14574b7a8efb99209c6908827eb. 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/TCACY1734898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22497b838a38fc83fd2d05644d25a229f64a2d83f4e2498e5042c8adfbef8786. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/TCACY1734470.
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 0xd51bcd0ae28ab9f37d0f51256bb86241f20af81d42feaa538a36900f0ed7a598. 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/TCACY1734883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82f93ef16e06a8b753c7a1d83d70658168dc36764b0939b7de4b2e86d30ebdb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCACY1734884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0348b0265716d905355c9abdaa7928bc5c4afa94a0b29874dbd3c29b0c534058. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCACY1734888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e0acaaed0f0740b42f2157ee2456ae079995f36de9bd38bf7df2ac5d97b266. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TCACY1734889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b5d0ce074fb6f0e07feb66107991eeaacbe023f85f50a4186b951d6c1dcf72. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCACY1734891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742a5dd97bd544898872a3f818582086c1fbf74651a9ffafdd3e7267744f907b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCACY1734892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c55ae3b517a9a6744eae70db646577cb4c855311458332abe525c068ae386e2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCACY1734895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc82522726d6e861a216cdce50753573aedeaa54e8a17ec9a8a2a29b66611449. 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/TCACY1734916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b98f8bc541cb086f1c7c1ae0fab3c79b4f85e434b13c2f76a4dd827a90332. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCACY1734929.
Study Music: Smart Music to Open Your Mind & Unlock Your Brain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dad05971cd4b23b35e0aa6ba7d637544a77188af9c98eb94c2f71ed02b38f90. 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/TCACP1634449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c006eba5a29a398fac1779e85485c9349c78521bd893aeaff2e87f740937c2d. 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/TCACP1634426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071c31d17c6919138aeff706efe7124b41b7ced8bf9332cf65cac7354b0b3c83. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCACP1634447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1d986726205575936f90c6b73493640e1e6856c90850ea7706ec9e4ad5f69d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCACP1635758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a52e626d5ef114bb6fad5e9ed4dbdf827cefff95cc9ca305512d077d9e5ab1b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCACP1634462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50983bf7ba443b186ead68a95b010bb9dc144ea830f14154ef9fc02a921f9888. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCACP1635327.
Study Music: Learn Like a Genius with Classical Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9864ede1873084a2876a7c43992273629c86b2e3513d97f5a115a278784049. 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/TCACM1603025.