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 0xa3a07377a8ed4fcbe95e6601c75818c6ef7a23a49c9a18d353921bf8d6e1506e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2703044b-2170-4ccf-9f64-9af0702d021d.json and https://artists.proofprofile.net/proofs/artist/2703044b-2170-4ccf-9f64-9af0702d021d.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 0x1bab6da8040034e2edf2f2e0c8a482d87c587639341a6a27368e7feb947f1dd0. 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/NOFCA8609040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5698052a07a3a61e67000ec62b5e63e337cb52f3669dab8901b01bebb6aa2cb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOFCA8610040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80882ded2920ca80a44524d54de637bebc4c147b5ac6a674ebc813057fdfd896. 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/NOFCA8610020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca77005068779cc74dcc2c705d31781f8954456ec6a2e14d1d85d86ea71c5be. 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/NOFCA8611010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f0090bfaf5a8c69ec89950a00bad88990788201c119081f8d1da677f9a2a0. 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/NOFCA8609080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279af159ebd9257602b74449e531e88d1e25e394120f1b848fdc5ee28c09e4eb. 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/NOFCA8611080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691f38e02183d17513aba8d8580a8a0c718045ef22a78ea26bedfa236be34d5. 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/NOFCA8609020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1ada1eaa0fe5d185f36d4e240d829fac967743ad784df4e70ca59bc8e0b70. 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/NOFCA8612021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb788b7d1b68543d070d876c9f80b30b8e03ef40fc906a3ba71347ff08eca5599. 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/NOFCA8612060.
Kvernen som står og maler på havets bunn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d760ac9c47497156a27ca0f93bd02a0924e2d2433eb07fcba31f2d09172a20d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NOFCA8610051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e5486a0e1626ee9150f712af5322241fbc8172f83cb05efbc686a5f4b6358. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NOFCA8611100.
Askeladden som stjal sølvendene til trollet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1747901f87b3392a3188ee90b1d861f78390e0023b730c055ab785eb8a5698c. 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/NOFCY0302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187a300b97c18fdeb29f509402bdf2b045ebcf8e2b3fdda81e61e690544aa69. 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/NOFCY0401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc8d5471248d3111c65f121f60c9d393df4cdbaa0383e72f7db2f0b4f4a68f1. 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/NOFCY0302130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd1251d3c4c30aff39740d49c3238b8eb275ba8c0bbc12d160bb20728c1fed0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NOFCY0401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de44888b47bb4359c3e2be1ce6f03a2610c6ea6a97301e38c2e8fb4eb2bd65e. 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/NOFCY0401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6d59939aade171c43a404bff4cb313dd8a6c5cbf771b4e97bf0ac6f7d4df5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NOFCY0302050.
Tyrihans som fikk kongsdatteren til å le
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bde4a781964919b27abfa99f1d17cc26f85eab88e6d3695bae6572705e324d2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NOFCY0302160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b86d0168147eb199e9376b9e168e7be21bfcd1875172dbc8b94c0d6479206dc. 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/NOFCY0302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72840517621dbaa51b7da300e721a854cebe334669a35a1f6f184f3dda8aebb1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NOFCY0302030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e58054d01a0b7dc9ce214d485bfc9dd707a9353e3323df9c918cafaa9f0858. 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/NOFCY0302060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804f4d804ba8d5e12322dffd47beb05a20955908cd3486fb91cdb379de71556c. 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/NOFCT1706070.