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 0xa6dde37343c8851deffff1d5ccf11f0fee523b196289c9bbe11ecb5f850c8d14. 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/7bdadbaf-63af-46bf-be0e-07606ff3c0fc.json and https://artists.proofprofile.net/proofs/artist/7bdadbaf-63af-46bf-be0e-07606ff3c0fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lost in Music - Block & Crown Retro Dubb
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 0x85084aa98c6c612b9f57bf9f39f252118c880baa9ee3cc0f77f6902dfa14b3f6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEPI82319782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb866b8c305dc97aad9393d905fdd740df1d3dd61e4865fd59724242fdf5c7ec. 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/DEPI82322402.
Leaders Of The New School Present Lissat & Voltaxx
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efa6ba99ce58adb09eec6213dd3c5e6e427cf4dba28a7b3951f92f582b77aa8. 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/DEPI82321478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c72070a119aa9bd0639f8e24b1bb495fa2a866a9c6acff3cdae142025f1cf72. 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/DEPI82321094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3cb24678015137f10d3f15ab56a20202f7456dfbde2ba94357b135628a7a15. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEPI82320340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c10b9ee768d04355cd96ca29a8ad4ad4269c480648f4d6e708830b9aad91d1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPI82320309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da744f21f3422446d13ad92c40a4cf790db580ad638f623107275556ff9217a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPI82319289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce00b820c1af69bba19a6181930a8604f753a8bb9878d26b4696604885bf24. 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/DEPI82313569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d2a3540f0c5c697dd10c0809c1e4b582244dbe50ce06718557ef4020929004. 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/DEPI82314604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402dbab5795e144c8e48ccfae4ed8e5ce2e959725e194b487bca22fe0dcbe236. 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/DEPI82311491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2952dedcbcefec0c6ff93af6819454038b6eddfa6f11a0b2eaf7f0d9f1eaba3a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEPI82311638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc610a01f5c086a85b7c3e538396b3e6cc65f79a1c3dca294339a50bbb3755ff0. 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/DEPI82310600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f395a160f4d3e414baeb6f4de9d8bc7836538b81b38374bbaa13f85a106963. 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/DEPI82311489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dfe38811ff40097f152e4ae2102f0c0eed97245723e428132bb2f9d2c2cc33. 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/DEPI82312479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17945395102a3b877085ff84b7a6658a6b622d4a6b6f4c9d9a42c9522c8c428a. 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/DEPI82310597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6fc2db78519afcacdea23b2e0aba1351c0db881a4b7ae2c07b22010ef3aa81. 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/DEPI82310762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f09ad87be8f6a74f31eaca3b279c51c42c32b8211d01390e87b757aa9ac6a6d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEPI82208496.
Beasty Mode - Block & Crown & Lissat Redubb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64314c161b96310cf1451543d48765ba5aef77cf75b6a823a6124a5665a87989. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEPI82308816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1221a1e03b32fb8d9c62658a19fa37e532c3157e90cf27d4da340c6b555b273. 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/QZNFJ2213799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cea63b814d4b77aa8851541d0b30813d778c2995168f64516b669bbdfb3257. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEPI82308141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9d3938eb261e4c02ecc451ecbea1baa57fa6ef65243ca761f82036c151a2f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEPI82302029.
Sometimes (That's My Shit) - Season23 Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e8248b6e53e994737752e57330d8efe1d49992c22f5d55c97725bd70464f81. 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/DEPI82307678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1db271f3b3899e5d0a85f27532f313539b603a1ceef6d1f6d2986deba41c8. 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/DEPI82306683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac310e10c7f94d6ebfcaec6977143ee61223722a837ab4325a8089982a611aeb. 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/DEPI82302939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b4956a40fc64c44ad6fb12a95f9fca2f574f6fda88d952ff9ad34f56fd40c. 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/DEPI82222323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba425735c1d21b3b18d077ed2a23c6d3411ede6fc462833e92d2306d146fa5fe. 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/DEPI82301895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8153da70242b41322bdc38175dd830879733344a7111a6fefd81cfe10afb5b56. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEPR32000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5ff508d57f08dab49db282866ce0991973ad063bab499530e92eaba0290bc1. 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/DEPI82303856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793cef55a65953fe2d57e4ebe485e5e40e5729d7146386eaaa6cb924e907b337. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82302566.