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 0x68a32802e06578b062b506da14cce27d8a313122f8d9240f347be1f86b972e15. 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/f1965d5f-3c5a-4633-bf75-2e7bc0e7fe9f.json and https://artists.proofprofile.net/proofs/artist/f1965d5f-3c5a-4633-bf75-2e7bc0e7fe9f.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 0xd2e3133b6d4323874dc1dc656f10e0cad40d1297c9a031b19f0b4caee8fceb2c. 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/ES64E2479653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b38db697f2751a03cd46ffa68a3ac9f88134450e30be58f74657bd4ed550378. 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/QZTB82231962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088cc1353acf14f59933475823e66f2e45f19d518fb5e2295bf865aff0f5741a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52459152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08570472495f91572de7fbf2b5eca3873889a468ea488dc739534f85dca5bb9f. 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/QZES72460931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc780d9f87c7e9a9ba4b9350c66154ad8d7525555fdbe2917674996d792cf51. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA82472020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb9d4c8f705382f1afe4a25daa6740b0701f85e24f1122f63fdbc62c5896b7. 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/QZZ662324136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549932cb399ee9c40d2d93047f8fd8fb240d12ff75e1f3da6994292a12535252. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BK4DA2318764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31994cc8fef09ee834b6aec16a95f303a2ca025fb754c4ceebf60714bef24f27. 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/QZNWQ2308132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57774db3667292090994d150968319567b0663108804d4ad320fcef22f0d1d15. 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/QZN882522224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589eb504b7876552e1d4e5d08c6d8c7f0a20bbd4e20517b3a792f07611f00923. 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/QZN882519773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c2b8ebe56e9f3526a4ce8f35ef0194837d3d62146da474b89e697afa3576fe. 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/GXF9Q2514500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9378fdaae58f0e90b4e638e2a597a53eaf97c9663b8eebe66ef967e621478c. 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/QMFME2488539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4817ca8a8a909510acb8df78c494bf0ea5f6d266bc5a42df94680ed235d9e30f. 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/ES64E2412056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255071cc1b6138e2a0e72e3d8400279caef059ff8c593bc0c31dbd9233ca1de5. 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/QZWDW2469667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195362eba5ff744fc42a867df73ad43fa03748bc92993dbf38b74d51e405bbd5. 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/ES64E2402497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c769545e1190dc92b7eaf9e6d7218e5528df4b9d52919a88945c14ee7a5011. 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/ES64E2498167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10d3a2f5fd8a895abd2815db23d37f69f486c01fd0d367273a62d4efc74e51. 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/ES64E2496315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff2be25f1b9317994e4bc4d66768c3389e0730fa570ea4450358fbbdb4758d. 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/ES64E2492954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa959598ffa79d49aae40238dbe0cb25bfa9a7421e878559920ec7315c0d6a0fa. 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/ES64E2488652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3133b6d4323874dc1dc656f10e0cad40d1297c9a031b19f0b4caee8fceb2c. 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/ES64E2479653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4123ab9a9eb89cc0d798f0432451e32e2ea8d2cf755ed6b2687152880cc4040a. 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/QZK6P2402069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088cc1353acf14f59933475823e66f2e45f19d518fb5e2295bf865aff0f5741a. 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/QZHN52459152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08570472495f91572de7fbf2b5eca3873889a468ea488dc739534f85dca5bb9f. 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/QZES72460931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc780d9f87c7e9a9ba4b9350c66154ad8d7525555fdbe2917674996d792cf51. 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/QZDA82472020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdcf49d366f5f1f3c6df14d27914a1709540c60cef91d154b2245141ee6a6ec. 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/QZFYY2463191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d75a08d1495ae92e1dfbdfb5ac8c33be395c5df78f2c578252e3cdc016c54b4. 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/QMFME2341671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549932cb399ee9c40d2d93047f8fd8fb240d12ff75e1f3da6994292a12535252. 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/BK4DA2318764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d89d6feb44fc5bff9152af8b0506d9e06379640e92d76408c11cf8b72db21. 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/QZTAW2326951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ca7adfb805391826b0efea07be12716b61423f2165ec38e2def9fbc534f78. 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/QZHN52361955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3706fd28fbecedec59cf0f8251674f1c6cf52cda15e3bbd96455f6c962c351b2. 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/QZFZ72313079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7106bfb85b29491d05a953ce75e99a801b23d86513aed18af41543a99f519. 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/QZTB72279269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b38db697f2751a03cd46ffa68a3ac9f88134450e30be58f74657bd4ed550378. 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/QZTB82231962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939d830d68f30f139140377fbbad4921b23440b8da5a2d3ebf1b344b42928b54. 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/QZTB82231961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb556c407db852d0d5576654ce6e3179deb5af0da0c031e1676b4f739a270ff08. 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/QZTB82229575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5032a0115b502359490b02ecfc308e5b7d443aa8405d5471fead87cc6955dc39. 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/QZWFQ2411792.