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 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 0x407390f9391fa502b64f67a04a9419b5473c42c5dee49618895ae85b68a6c3d6. 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/93b30865-d71c-4542-8926-01e28f76b46b.json and https://artists.proofprofile.net/proofs/artist/93b30865-d71c-4542-8926-01e28f76b46b.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 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 0x82afde7c3e0c2e945871b3cd2e064e71ecc2e4feafdfbb9de86c04bf382d7d12. 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/QZL432400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd09aabbe28308a9a4d355dc949bd0fb87650ec7a513f3a3dbd08be954fc2365. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6a303d05b8c3a3888e082d0d5b5ad53e4649f676799b3e989e6a36965bdf9. 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/QZL432400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8db85b0f86bb1403cf13cd6762f700f294a884bcf999315578f22ecd422069. 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/QZL432400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914452b0eac89cb9df15277bdf9af84f9bb22a486d72c4775bea72911aa8cbb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c45e21661e712c55d3b08d8abd274a76fedbf67e23ef31816e591b17320673b. 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/QZL432400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aa8834af9090b7ed3dc78d4934081b9407529de5ffa3373d2305f098da4a17. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5072934f27a2a69454e872e1ea6df0dac5aff1fc0e6a4fa24f481766c89c678f. 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/QZL432400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506cc8d80c35b6dd67534261baa6c71664c724a631e13217242c9a50bcccaaf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0724180a7b546c13420f7110d2a95ed9c70547c5a182c7063ba18101232cae00. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaed6bf31b376a015d9305fa9980a4c1957437a56e472b04fa21372b700dce5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577b285d10aeff2b96e51c623b06c7e1a8fa32ff1a1fdfd213bfe82361e786c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de671279aa53dad77d031c14a5e94f8e559f6ff9cca62a250571783a517205f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a3a524d6f073a11f446d8c81d52f697cb9426e3638930fbdf7985241a98f9. 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/QZL432300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9dfd4eabf9413283177703a6e12700b5e4a6a5ff120f3c4480423a08d3e8cd. 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/QZL432400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73bc455ae61283cd0c702e2d2bb6df1f3715d62fb9d62060ba0a83248e56f8a. 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/QZL432400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e45d2350442d165e0b817780ff8dbd769b0da5ba8238ae89e242b863876606c. 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/QZL432400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a82687333893183136200e726d08716a43f5bee97e944ada461b74a80906f80. 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/QZL432300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aef3baf01ebf029c7b1725ad8fd5dec7f5ec2b89d7a5d522b55b08af3a7937. 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/QZL432300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc26a06a346d1d6ddb611b8c51719817a9f2cc64d8e3c6fa83a9a8865cb262. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZL432400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263bd9ec1bf4d7b5197189260ae3cb13d57b3d39dff9b412937a48700e7a8579. 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/QZL432400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5072934f27a2a69454e872e1ea6df0dac5aff1fc0e6a4fa24f481766c89c678f. 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/QZL432400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96b664628b5b8981cef9c4087b8b2dc81462ff015bd3c90b7d6a03fb437d36a. 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/QZK6K2275145.
Hot As Hell: Ulloa Music Session, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c9de1dac705cbd8d560218517aebd9496a20aa4769d430b53a591a1f6a8559. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHN32222652.