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 0xc393730cb318572df7826894b6fa15653ecd6098d3fdf05dcea88bd1f20db06e. 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/e1bcc55b-2507-4ce2-97d0-0bae3a5887f0.json and https://artists.proofprofile.net/proofs/artist/e1bcc55b-2507-4ce2-97d0-0bae3a5887f0.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 0xdab7652ead791e9d0774e845aa3eb6ce55fe48f3b40731002aefd23154dc4436. 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/QZBPJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde45ad08d16f125376dd0c197faad11c923c187bf921ad564acc717fd1f278b7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZBPJ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774586a541be0b2a3d0bc4f1248d0b1f89aa92b4d1cde1b964fc633535569666. 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/QZBPJ1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c296885f262696d4d3610f9a5f3dea757e90438bebfbe04bb9d53651865cdef. 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/QZBPJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbd365f0a4cbdc3f9d432a27d5914bf5b18876d1e557300fd4fa5355ad60edd. 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/QZBPJ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456521794f491dd0e27423a437743b94e07074b57a9003d930aca4f4eda9107a. 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/QZBPJ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f770037aafb2cce941f8b90afc8ec48e032182b0e675e6f6a85f5d774c4d78c. 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/QZBPJ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34580b9ca810c09feaacc6744450a907d6aa3a34162df9650041a5c678157ae2. 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/QZBPJ1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40416dcbdc08151ecd9a0b8a4e267d633b2d248edc801c9221a2826661de53f3. 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/QZBPJ1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5059030831fa7881ea503238053302524841a7d8d558892aba9f45cdc95f8765. 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/QZBPJ1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbb7aa2d970cf950197497dd2c63a898047ba6dbebb34fff5d02a613e03603. 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/QZBPJ1800011.
The Calendar, The Energy (If This Is You Then Woe Is Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749bf9a9c4b36b61b21187bcec0458ef8128a6c1c195726133d4c3bc9233a800. 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/USGOT0516027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32469b12a0ac3683c05fbdef78c38a4d4e9a3bea4c76a88162326f603cc3ee03. 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/USGOT0644014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768916ab5bf519e1c6ac4209205089eb67e14986cd9002d2936034c2ea27b8fb. 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/USGOT0644013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff31f86887081ebbb7c6db8a5b226743d55d5d25f11dbc31ffe93ab7a2151fd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USGOT0316015.