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 0xe783482d4697218f0a7cc253be6c3696d2f0f9090bd903ab9065e6987cd3a352. 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/0ce4c6d1-0a5b-4608-8402-de8feefa1b8c.json and https://artists.proofprofile.net/proofs/artist/0ce4c6d1-0a5b-4608-8402-de8feefa1b8c.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 0x5822fb52ab3a4501271baaaca133e319c0fabab55497d6ff10dbbd2666ec45b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADS1889955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a261229e3c8544248bea58b7ba0fd91b6e8515a1576e2fde65c487eb7db72d2. 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/TCADS1889995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec069295d884922f8412a17e559b65de04b3b334252268114488d2aaf429b233. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:50Z), 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/TCADS1889984.
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 0xd28a0945c837d18e6c93d3e969d545e4de594ba28f35dbe4b8fed955124904fb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:39:35Z), 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/TCADS1890002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aad6012694ec06e13379861f52534297ba2873c5874a0a76097ec5183517013. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADS1889958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1663a87acf0206facbf0aaafef7d9ead2e2f82a80ad246054861818b3da3a. 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/TCADS1889962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0fafa444f7e3a21af3ee139ff8f35241f7621564af1b0b94fa0cb3116014bd. 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/TCADS1889967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a9a46651d10b14a3677247953470a4444005fe8b46d4fe4f84a0e969e2468a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCADS1889974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86843c6f8c1d31347cd205d86aea3e6d0be8966005ab886bf90da75dbb113f3e. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCADS1889976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf890ea5934c2929270bef9576c367da1eef828bc2696905a270d2992c796957c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADS1889979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e968efce0a910c4ddae3cbebec6938f5181d8de25e086645b040b70e62500. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCADS1889990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab6de625d97f76f2e552eb62b7effef3bfbc0305572c949b0dbe92f1afdee87. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/TCADS1890017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d234a98e22adc4852eea87f7781e7b1b6fa2d04030a99a340807d8293ccbca. 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/TCADS1890018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98118072f962f8c071bf609070c032fa111c4158d24102957e429a2578c6e6a3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCADS1890019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f528681d11379731461cde71caccc6c8bc8fbb0faf528b3cefad35551fb4ca. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCADS1890022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117167bf1a9759d0417e9d3d988e943c90f82ae8d16ef91328664df6c15c9417. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:37:41Z), 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/QMGR32009667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e08898aabad1d3c9c017acd8d109261194d89909cc4808c702c7712e4bcf52. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZRP52121074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0e12f60f9f0bc5ae0adb4867dc39bed62d55de336fc284697e9aeea35f8df6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52121075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e360ccae99ddc301f09f6974c541ffc4f26a03d79f9c0dc111e9ab75586c3ba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZRP52121076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ad2f2dfb1c12b58f0d4a7a67cfc6feb53b36744938abd1212fe4e3aff6f8b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP52121078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc6be241c10e8d3e0384acd06af44b2ea790c6e905c1b4c63e753a41efd33a4. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZRP52121080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99680af0d115a712844505191e55b58e83af181c237b01220be0ccbf3c9b03a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP52121082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415103663c39b92d5a60bd49f3c0fe145689cf1ac4104a7310953eb7ba5fcc35. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZRP52121083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1efcdac6d9bf597e3342b2014291577b910a22eabb74a2c7ec6fc1814ca9af. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZRP52121087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e23c151659c9ea04c0a0c8efe9696243aabeabae87b7d8ca8e2d967b434a01. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZHNC2385757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb753e3235481e2f8e8468952fbd2ce7ee0777d97b1d92bc2476660f2eede02e1. 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/TZA1X2300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77f5effc846be2980ced8d47d6e62411f680eda110c73d1ced7bbac66e13814. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TZA1X2300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2568e7d6c96bceaec47e3accb33dcaf801803f7b0bd6f33f7194100421734a83. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:32Z), 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/TZA1X2300414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbffae86087896158090652d0b7b2959dc1fc5a797a8b864206459ea9e42744. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TZA1X2300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98905481ccf72920b33c7856d280a293c18871f4a8bd65eb57422b41526d19db. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TZA1X2300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4146f88f31164e0e3c575f664bed5e47eea85553cb67db88e58897cff1b63c. 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/USL4R2332930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbda89c2deb566ed56adbd5e1bf238156aac87904194edb3b339e3b4275b835. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAC012300862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa558e57c0dc17115d45db8a7f77c6f47fabfce1dfb2dcccfc6d4c236e1ffd30e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCAGF2297157.