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 0x8fa828e6b3b9e952c3133b6827d499dcfc3e04236a3ffc474a7f40221323466b. 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/905bf5bb-6ce4-423f-b570-d737878f0969.json and https://artists.proofprofile.net/proofs/artist/905bf5bb-6ce4-423f-b570-d737878f0969.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 0x1bd9350364e2db9709dcab2a8ae0e25cc5bfb20702a3c96feaddadb41ff4d4a9. 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/ITO172200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23416391b61763fce619a9f6396bf76a19131bddc730e12878a67fe442b52dec. 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/ITO172100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00215ad6a02b05c4c7bd4fc97c312a611264cd843c07cf2888e80b64805ae987. 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/ITO172100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10ca6b934ac03ed075cb11bc341c6acc86938aed8e08d87fa95d05fce92ad8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITO172100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094564552dc3e6e8f33279ae4c1ebe1c3daa938b80967c1d363f5361a094cb83. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ITO172100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204d515aa31de42e10a8776943d47d11bfd01e082ba38f77cfe29e1379096abc. 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/ITO172000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1a51eb9d5a0b49e8060ad557a4d28fb473de8f7ec5dc78f48d83f660fe136f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITO172000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c7d591869aa3db79ea704deb210429f9aa90e24bb954f93fc26e10eeb362d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITO171900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d029071ec52ad90da0188ec979ed824cfeefe573da320858b83f1fd0ce77ae4. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ITO171900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c71a402d86b8af95459303605872b65c3fbc8e1a022d2e3b7dbcc33b331369c. 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/QZFYZ1995577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aaebbd9305fbdd3da2321218edb36126e3a7c01c35ca3e24facf63715cbe5b. 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/QZFYZ1995581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95dad39b2aca6c8045b3535d7e7bfd644e608cdb418e76b760c29eb55a237e. 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/ITO171700544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620777957de51ffb2afdd67669f57730102725c3897a598564193e2a7dac5ddb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITO171700545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb19ff998a468e17c5182c762cc4c6e76ccd306c8b955272defdb6d84e5eb415. 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/ITO171700546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2a297de7f4463b3b5470f7387c2acc87cdc50c5bc2a8cb97e400d4a6ee931. 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/ITO171700547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562a7df70005b9848d2fa7a12b4cc661d82e83c4d2fda11538691bbf32501277. 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/ITO171700548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08629b295dee5f86e717f7919b28fa519ab3220e4997749abb12ce72ba15e968. 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/ITO171700549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814103c939f9e01501aa14d1b32ca2213fae18eeb8d3531a51afd7a372cfb0fe. 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/QZ4JJ1994211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336426521d9f1898a7b1f62edf752b713bf55c3ef28e26542b2dd3b85a9a015d. 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/QZ4JJ1994212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04694c0de37c57fc07d6c8b2f4cf088904e8c254a0195e83fa69999d8d065e33. 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/ITO171700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347394bd119daf4a3465695f11dbe97285126243b61b05f79ac00098ff3664f. 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/ITO171700174.
Refreshing Experience (Chilling Selection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f72ef20de9dd6be029b684762607b1c19fc9302fd1ca686907fcc89e9aabb9. 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/ITO171700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32bc45a10020b9977e0df6bbc4b221c6d1da08aa7bce1d8f3dea08b183c75e5. 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/ITO171700157.