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 0xf9d8b2ef206208c8c2a94708fd0690343f1d49cd1c4b73b44d5c63fc5c3708d4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff51a30c-efce-4281-85c9-d84cc8beebc4.json and https://artists.proofprofile.net/proofs/artist/ff51a30c-efce-4281-85c9-d84cc8beebc4.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 0xaa4919936010d025531973c9f5806591f9d6a05619ab85002e868a5ed2b800ff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ41905783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10509db7c3a0471ac216af8f94435ca5991bcc28a61f7e6f97c613bff24d84e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6F2035605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c2a045ae11954273ab17ddcd9a984704dd4f2b3478189da2a8509e06c263f0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWS2184231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d02dc158ed38ee827209efa659b481e72254183603d4136e7048536641b544. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZDA52255994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec3810e88ab17cc625847ceaed3db432a95a405dea7e3bdbb11667e2166d01. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6J2233163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785a19723e20cffb54c93a1a22856fa734cab762315dc768e9622d8d8a453e7c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAZ2493106.
dancing with a silhouette (I still cry for you)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75e7842051a121bdbc8170473dd26cdf39ae05bc33384fc885773b9d86375e7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEYT72200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51667a1578311d13429d738cedcb4cd4514dd4d4c502ca58b0bd7197d1ce50a. 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/DEYT72100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68170245d8a3dfecbd5d35b716d9c01c2d622d8ab3f3bbb94f2fef0a32a7724. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEYT72200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4083fda47a7033c3b6bac5cfe033f455635feeeef35d64022a1b0f7a7520e80. 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/DEYT72100458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fec01b19fef92ab875f321f9850c0a88503abc1193350412335add6aec3f88. 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/DEYT72000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b2247de5ab7e06ae8eaf7d6d49b3273b17d38407149f1d74f9136a330a1b38. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FRS182142869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ce92bf81a279aa0f83ae7c97da0cc15d64b00010e4862475faf11acd31e7c. 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/ITJ872000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3915eab15ddef0cb96ef7eb2d51f82430a2cbb44bca4be255842855202aed. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:43Z), 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/QZHN72051268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ff17ce69f25c6d0666728882cd60d6d6fdb30014a4fe139faed996fdf864b2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEAX11900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502cb1ea44930acd57248d3c4511c59208833d4a9e7ce03efe64393ade17de95. 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/NLF711705440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecb67caafc3c6376571fc6961caec01c2a1bbec6162924192e723e552e3de68. 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/DEYT72200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0636471da305be747044aba112335277675b0c34003742e1297a5b7377d7c3e1. 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/DEYT72200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17ee161c1cee103c74d226c67592289738780222d2487e5804b940be1c4072. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ITJ872000214.
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