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 0xe7895d776968b0600070a9c7edf7bd65300ff899f6cdc504f6c3cb7dc5c07b98. 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/2310be7f-086b-4377-a5aa-52a4ec62011e.json and https://artists.proofprofile.net/proofs/artist/2310be7f-086b-4377-a5aa-52a4ec62011e.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 0x253e183ea1bdfddedf02b8a4a58317e956c41041ff9fbf457196bd6710917bfe. 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/SE6I31998803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc859a04de33cea0352dd1104dba7bd42487ed88c0359cd9d301d6162edfe3211. 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/AEA0D1806618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c52ae5729ea25f0b80413721f39e4cbbac4533a665c4abde75cd79246d6714. 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/AEA0D1806620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa259c4fa7a6b62093b6507fdb5b9ead42b207b1b0727449ec6496cd737f0af. 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/QMFME2015414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6236e3532f93e9dfc769475efbd22273ca85b89359930c1f843029e03f819fbf. 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/QMFME2013274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd44e0e806f200b49b624ca50950b32f230ad7d2f61169865ea513425d8a98. 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/QM7282018805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8345a2c71a5936d4b6e5e3a9ec83a5e873064013fef05d9851964e4029e11f42. 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/QM6N21945342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd3c5b0b5f9d2dcef73eb263ef770509206aa13101bb6078914f313b4539124. 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/QMFME2013806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234fe0206a564aa5ae6d54407904e6fe0aaa8202df9f44567db720f0df762e1. 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/QM6P42049853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9489dc17784dd670080926c285d61397cd71ac74a75e349f3dd75049fcbc9. 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/QMFME2013808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b834c3a11c0bb3471803caed6b329f89c066c9b771db19b13714d95960a61e1. 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/QM4TW2065329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa015dffd1cb7798e91fb20f5323a5abdc94f0949feca503da92961162c3c6ab4. 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/QM4TX2012038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830995ffa295da4c91ee6cb7645faa3c61343a6b2d9463ee760c1320411916e. 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/QMFME2013840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58818a36c269d9eb5cd8e048b484483a9287399073169e808ad86abcbcea33. 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/QMBZ92083667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb354bdd80f312398795ba4f2fc0e59970d75301f7ecf9988aa2775270c76bf3. 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/QM6MZ2017709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e89935b4084fd66601db57777cc6bb62dc3d825632da9e52f99268d89ed43. 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/QM4TX2050602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f24e2bdba3c30f94b198094f0ec119cfc24bf6339098558f06bcfee810e97. 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/QMFME2013872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7490190602b06b649ab49d9d285899d697eb2a25487a11715fb22805e4d65. 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/QMFME2013876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b7d6af229801be83f34a0c95b4d12d73d48d9d375ab8e22fa8dbf71973c2b. 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/QM4TX2099318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d4ebcb8b2239310e809ab68c766df41c724dfed98e72f57ca43d0437cd86b. 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/QMFME2013811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb415e290b685c2ca052ebf7018deb983ef57837fa6cdd37bf1e9644479d046d6. 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/UYB141824102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c9fa6495fe54ff20e4f8533b799b1dd92298a83217f441315393594f6e048. 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/UYB141824103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51d0ee9b74a94a784df527f4501a46d5e14f1cceadf1b7bc029a95cbb150f71. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:54Z), 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/UYB141824105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67de43078c1749193485edad9a187d9d51007aaaddaf2363a19f3201a530c784. 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/UYB141824106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b739c27c9e96e33d22ae1b6009b41f25972935fd9b2537ee1890548f96ca2d1. 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/UYB141824111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2bac1ec9c133a0e04a15a5595a4f74f895959e3f863a278e263bebca04451e. 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/TCACS1636881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043936298e166571992d65d8bffa1d44109a5f65a9d9368d6e356ac05e765cdb. 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/TCACS1636883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74959ede20865c836d09bd50dea7c81a934b45fb0e073de4db6664ed02113bc. 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/TCACS1636884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2478b81398be49cbc4c438477ce04713cc6feb28c363a266ff4a7f462c0ffa1. 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/TCACS1636885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3dabde6e6416220b859b47ffe622bdeaf7495f9f623847a41cff3c5f757991. 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/TCACS1636886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246d09f7c2c2a1db21e365e1228363a3bd045bfebf32c47ac8545c4387bc3559. 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/AEA0Q1806764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234fe0206a564aa5ae6d54407904e6fe0aaa8202df9f44567db720f0df762e1. 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/QM6P42049853.