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 0xd51dfb6e188eda05eb5c22ba036bf1253e984a433cdaeb5470f5a4cc34148c9b. 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/7289f628-c0cc-49a1-a56d-a201ee0705e3.json and https://artists.proofprofile.net/proofs/artist/7289f628-c0cc-49a1-a56d-a201ee0705e3.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 0x197401a06481d17043b439b795a5c5a34bfc1e6505cf29200ad3e5bd47b0835f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLCK41024211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84657417c9382ca57ed9b924c80a939232a97a6f17f568a0f1dff711723eae74. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLCK41034449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa067de86cca47d709fe66ca672c0393f875fc4b6d646245743bfe48812cc5549. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLCK41047241.
Never See Your Face Again (Acts of Mad Men, Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645d08358e379a1c98275d6bb0cf179acc6c4777a9ddf2a00de2d746363be701. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBTMZ2001024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5abd908764fc9e405fc788c3b43fc167f897d0ff56473d9983f7b14f008175. 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/GBTMZ2001057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f645ea586e439c104a44e4126b4d49d332a9a7d0446d8b9b13e0d5f3a4ed1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBTMZ2101069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fad932eddfb29a432187b7dc12cd0892c977fccdf5440769e96f1345883c7f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBTMZ2201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21055a6bb31788d818da3766c4429912c8102a0e175e13d05cdaed31ad8db36. 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/GBTMZ2201138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727e709e54992df1c16568a159d156f590fa4057d61b4ad33ec192a9a170de3. 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/GBTMZ2201140.
Annual 2024 - Sampler 3 (Viper Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f820bb15f8f49fe54356e4e545e7f4d1da0ea23dd9a94194881ad81e986f72. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBTMZ2401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f286ea4329d45c8ef68689f69f081828d92576ca3f9719842d25ec794e93e10. 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/GBTMZ2401262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0637b0472f2a93614cc1f56c350bf3c7193c7197daa9df5b4b997d871a0e3097. 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/GBTMZ2401264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b4cea40a4810af1e846e86a99b5b18fab0df2b040afb39c524d4687a51ef37. 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/GBTMZ2401263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261b2fb5a5d4a33fa0e523cef85ba916930a537e0f615722e640d7a9285e81c8. 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/GBTMZ2401265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4edb1715014817b7e01e89aa8aa2d43f97437e1a631e73f77cd3c4a2048e616. 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/GBTMZ2401260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288d2e025bcdddf78ee3e12237a7c8c036ce5c0b6ba734fda176c0c7e37ce7e8. 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/GBTMZ2401255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f0903c4d81e1dc1fa48c58a76e2d95e8b5bcc2aa9453c7562d07c1073b3621. 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/GBTMZ2401256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9891b8604545d7c7dfed937c0943d65518f0d8bc64bb1d32b2e1908cbcf7e4f6. 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/GBTMZ2401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b271ec69da0bf2add63b55a1b334cba9a22bab3341baaa1fb740e82c6bda2a8. 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/GBTMZ2401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85563a1e04b787bb80c0a129a159bff0db1f0900ed4e516ae05eb641b83b9344. 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/GBTMZ2401252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc515cbd2420b45dc6d3f326f7ca19eb5c4fc260b9de591330645643d15c8ae6. 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/GBTMZ2401254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da6a7a9b714c647e5274d3dd6b4ce15e080e804a1e2a691326d81f7a80830f. 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/GBTMZ2401248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f820bb15f8f49fe54356e4e545e7f4d1da0ea23dd9a94194881ad81e986f72. 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/GBTMZ2401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f685a6cfa8dedd7187566fd73c5f85bdf7ec2cdaf0f3d187f835c7ac59de2. 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/GBTMZ2401240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b162c7a6335ea9aac2ddb1dd88719e992b5e7b22b4c804e31dbd5baf19cf0. 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/GBTMZ2401225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af22a74a6ef5d030bb9b773bc94a0fb2c4020990fdf0ba73122507bcba325d8. 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/NLCK41059207.