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 0xdacf64fac5026d9474cfc4a032968d515d41aef3a0af31aa807e9d3530f4ab39. 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/551b323f-1a2f-4871-a4a2-c0bdd3a004d0.json and https://artists.proofprofile.net/proofs/artist/551b323f-1a2f-4871-a4a2-c0bdd3a004d0.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 0x53fc547261c54332cc5ea0e167fe1bb96929ff4fe771cacd8d1d7ab251d96e53. 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/GBCCH0300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150067342cf7f3d511a1de4824db15d2fb85bebfc03af9f4aadc56e9d7196527. 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/GBCCH0300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e60ef5beb3cec577db63d725bfe7c8dff6275cbc5b7ae07b5dc22cf29c565d. 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/GBCCH0300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144aa00dfbe38d2dc560ee1872409762b12446afb154f734264923434fa5fbfb. 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/GBCCH0300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65af2918765f1de7ea807b730418129035b4bc477446f07d2b0e4a1c5286c68d. 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/GBCCH0300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d23ddae84d56b781355c127b5c066168914ad57c8404376914fb3f27f81c4. 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/GBCCH0300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe503f888a6adc5ec1d871cb84e4d87b7266294f252832ac76f5cd3dc70ad72e5. 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/GBCCH0000315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff5f5932f5f07b348be2e12b527907c0049e5f6d5037a3f4f7f86850d240af8. 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/GBCCH0000316.
Miles & Miles from Marz - Instrumental Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b90cfc74e1c9cd2a62833a123683c7dafaf10581e33740023f75a4f106df36d. 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/GBCCH0000317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a71850c6adfeab9f1bb0952174b7ad56c6779b6d52cef599a546a46cc69a30. 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/GBCCH0000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a612baed669770496937d33da3ec48aed55062846aae8cfdb1a10a0f885642c. 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/GBCCH0000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c150a78ee683d269bbece975426423aa1c725ad6a8373caccfb1b0a2129473e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBCCH0000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61389235047326d9a24a72f24c8750968525bf5189453020c2a5b23f3cb987d0. 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/GBCCH0000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2edf42cab5fbae2e0f651043e2d89f3663a44f233f647020dd4b1850bf85cc. 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/GBCCH9900234.
Progression Sessions 5 - Continuous Vocal Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c19a61a2985968cf47a0bfd7ef9c223b033ad11d8981fbad060dbf9c3b28468. 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/CHA531300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee2190a8d2ca710341587c77c7f79535fe8291cbea052f206cf8fd257b72ce. 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/GBCCH0300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa625a00b08adb532d6ed41520a74fb1320b09d75e67aba42c9e48c2de3bd7f1. 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/GBCCH0300109.