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 0xceba3a9d356cd6c9efc418e7b90566e072aa1fc35f61ae5e82a4749178425640. 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/88b67933-8203-47ca-8acd-80859c5db684.json and https://artists.proofprofile.net/proofs/artist/88b67933-8203-47ca-8acd-80859c5db684.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 0xbcee79b639c3bb8f7e38c86cbba3b647cfdf3680304f6b7a21594424beb6e3ad. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZDA72050224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a071859a7cdff2482c6b1cc8fc5a2241d2fdff5b65c5f99cde21ec846406992. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72050228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c027b1fcac2ea7e981046b71254812261c5c0abb5452d7edd5f66574c3454. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA72054424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aeda179422c1d3aa10980eec5f7746bec0e49581e0e667a85d968c83f7fbd3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZFZ72101500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac32e7fa102e9e57d75c4c9fbe985373ec4e2cd49cf9fe9c7e07ac5f4a6436. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZDA52262456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce010432cda06f68141ad12697db48c73b2eefe23200aa34bba4986ed6d85f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZDA52262458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4919bb5d27f732696288541b7572ca110b0fe168b946b0b018aae88bb5275f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA52262460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63554ea9c514a9e34165a8402ad4a11dc4e650eadfe63a6b496fae4ba3119d86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2257386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9726d9cbd5c0f19201dc0d8cdcacde7d4e1c9dcf073390bbbd56bdad3c66ab0c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZFZ32393173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa93725a8fe01efbdb5da7ce7cbdf3f48b159157127ed1b358cc93dd884b410. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32393174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf48038d68315eb8592aa544bf544d702127e10ec01c4faf564e5058921852a. 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/QZDA82374334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27f9ef6cd56a9a9c5762a401bc9951bdf0c1f639533b10cb81664deb2b49064. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62315565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc318b05e3caefe84e1471949e6ecdf49e571d091febec66cf41a9b1e21b1ae1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DGA052433659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9fe36ca10400d4ef6272ea760a082f6bfa4fe7f7ef64bb09ba81e0f9b52452. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFK2448609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8200f5634803bae619503750b919210e4716bfb125b23265976079668da263. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEQ2547446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f1ddff5fc71dc9f1d53921670cb2178dc0b16e15ebe9c42e12ea42a0f72728. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZMEQ2547447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b712ed6332a49c57ebe6542fce906e6d7d21355a9b2cd1b2e02a0fcfae9fc7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMEQ2547448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb5c7517502968048cec5fc33432936ff793b401826a875e495b679745cada4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEQ2547449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9fe36ca10400d4ef6272ea760a082f6bfa4fe7f7ef64bb09ba81e0f9b52452. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFK2448609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961a5bf08fc4c652a3333a285184e4aead5671f71431f5e09beca1453d860896. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZMEQ2547450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0eab8c2ae310c471d40361fdd70bb8e8c7357629119352f2a0c7a095b8ed61. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMEQ2547451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec57f1544ff0c214e4a663cf1812403846df44df41ff0cdaf923e959744d8cb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEQ2547452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8ea26eb4b4e481aefeb258b94faa2e33a0b4a1ec97ed2112add187696358be. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZMEQ2547453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e63e7fdb86e24fc4a4dac1a306a6b5e19dfac7f20070f8689f0f3806bdf0fc8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEQ2547454.