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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 0xe05517fcd9ab8d7b271b59f566894fbfe8f5660e7f9879a565405ba5f20c4d09. 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/47fadcba-d357-4a1d-8eed-e95122974b6e.json and https://artists.proofprofile.net/proofs/artist/47fadcba-d357-4a1d-8eed-e95122974b6e.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 0x24cf5f9e35c20d077690b6f0a380140aee3632c0d4f9fcc482611e8a95735614. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CHUM71100511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73eaa3687ca581f787e6ee136175f47b150caeabc4201882a78e4f59d2ada6a. 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/CHUM71100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bcc82d0bc55d72a3d005312d2680fe8c9f360e7c031afb10f12c9afc07dae2. 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/CHUM71100512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0164dc29506e4f711f890c862f0a819202fdcbd0f59ca3e3b164677efda2d9df. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CHUM71100518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe236d716299b1e39aa5d0fd2efe1fd49cc6cc3131f89e92497860c5d202f90. 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/CHUM71100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599ed2dbc6abc2d6eac51c243a4f3e589714973c9958b7d5268b33352b5752a8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CHUM71100522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42506446d2e65b2f772a8324fdb78b7a4c389703899c3aec7e90314aff7db9. 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/CHUM71100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5199653aba73bb5420f7a6d5061a6e0f85ab82d76ae961ad6bf7fc9d9a52f4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CHUM71100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638a28b4864db2a641646fe5003b3ab5ec5ba100e9a2625408ce3adc77ce2bb. 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/CHUM71100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030fb1f253adc6fc3de4262fa6ccc9847249d61973effa207b71da7bb6f5fd84. 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/CHUM71100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8cd7dc77717855234958e63a6608d744fb292b78a42801157b2fe5cd566c24. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CHUM71100516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b02b6188a8d99f4c4ac87d1edd634e70cfc365b9038ab710a59f6690695318a. 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/CHUM71100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998ca00d7e9740f79b517c8a79aed99dd60496695a502b836834832f58ea8051. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CHUM71100517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b1a5eda80b4e89a90905be668a7070aaeb36fadf09431b98b6b4aa5f18438. 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/CHUM71100524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172bf5cb9313d5035ff67db419323915079e12549700fd63965cf7f0aaeed32. 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/CHUM71100521.
Des Rois Des Pions Et Des Fous (Evolution)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02e0bafeae9814a04777b63eb57b08eb5bfeb2fcdccee41c610a55892f854d6. 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/CHUM70900762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dfeec2b365a2006c23daec32b729f7f7ba33bd87b9474e3a65fcbcc4e7c145. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHUM70900763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89533ad64d2cce6c90e6305fcee4836fd771100bbed17127decf9a8aaacc65bc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CHUM70900769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69a66bc5cab43b34242114f047c021d0eac836d700963f3e8800063ec360de. 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/CHUM70900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f41bbdf31f7106322fd4e66ceb276eb1d9986c8a61524f67f4b561678d65e5. 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/CHUM70900768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35c333dfa19e670bb92ae28bb6bd8f6348a2e4d0dc3bf0986ef6f0da7dce72. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHUM70900765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716b10f7a3408f23bfbae3be5326684f0eab0cc44db9023ed8b531867f4dc87c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CHUM70900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0313be4bc2531552dc0e21915fd6bd2d568834d78a85f9b7913686aa7cafdc15. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CHUM70900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81634349e9fc86b23e0f9ecd700ad162d2d8387ba9fe374768b1d16ae676c705. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CHUM70900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2487b6f0f9ca06122d21ba8467e8122aace7306498aadbebfeb28d587f75bae1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CHUM70800359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1989d1ad460265ce8633e35f8cec58e0f2310fb68f432c357500badcd78154a0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHUM70900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0f1c1d7b0871ca4cf2bcf9d094c9dd04435c867599fc749ef2fd0a85b6af7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CHUM70900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccff68daaa5779208b85fa8ef3d5b4db7849fd3cb81ef325b24af11e17619dbf. 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/CHUM71000398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082a99fd50762319e56b2125044093d4c25d3b02e155b66ac01891ae7ba94ff1. 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/CH4061901667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60ed5957d1ab8167e0bcb29d5e982b793dc53ed67700911a6599ca231c7faa0. 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/CH0012300205.