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 0x16a4128379a8f6b4b38c30aa17cc7137693f81a9e71201087b74b6a59024818c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6524032d-9cd3-4673-a54b-2566fa86444a.json and https://artists.proofprofile.net/proofs/artist/6524032d-9cd3-4673-a54b-2566fa86444a.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 0x889473871ad0f5a119b4bf4fae7503d2ea4f541d9662db865173e7dc0fce2337. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32668d30f43a0b5710db2d55c5c27ae2a0c20b8e28dcd4f678aa4c802e44ba42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5814735f7b9585321978fae69a3ab6cc23867b095882fadf92dbd8c4fc866d17. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/LVA109800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e3c260365e5b1896d146f7d031ae039c88364dbe3f4a2c28c3d52506de54bb. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QMDA71391549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fefff6b1c227f9123a48712223ec62f181c3de4d065580b8d7a04a03268dc3. 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/QMDA71391550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747b05aba61d553c03d903e30bce3c653c995c9e09b0d9120f5c6457fc3197d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/LVA100600357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ad37a8b26014caf6d818caac7df3ae842020e8ad98f83d121140d007b23e4c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/LVA100200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ef1fe219aa09313682ac5de0be30f87bf9cf226790b651c367c6e7744c64fa. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/LVA101200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457390031ad4ce48016a7ca92180b6e72ac2e48951ddc4e3b61167ccaba4075. 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/LVA100100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe330a0d8b9b604c5aeb5727ecd1afdb834d13ee31a430e7a0994f5c7e077ce8f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QMDA71391551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef76f75912f13828d42a1bc289b103e5ddbe92af707ca6c32dcc3d8409e4359. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA100600359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8e01643ac06110fdf120357915955456daa5878b589cadec8a7e96d9af2bcd. 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/LVA109400032.
Ziemassvētku dziesmas un instrumentālie pavadījumi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c9980bb072097ba2f69334967f9efa9c0c4ab7ac2ee84b91b364824631a5f2. 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/LVD011400450.
Vislabākā Latviešu dziesmu izlase bērniem, 3. daļa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7383a6184e76b9fe6958609c6d5c86319d368d9d6db64abf1cf29313c4ee216e. 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/LVA100500257.
Viena gara turku pupa Rūta Dūduma un Zeltābele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66b31621b771958519a2dcb8b59ca09a7f1d07dca105ca7f91c8b1c752ad59. 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/LVL151707267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2a78baf3943cf9198f30a2feb5d78a73cefebbc9e0f675f2534d07b341d9ab. 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/LVL151707282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33038f24dec57a1638e6cc7ba0d4ab8d8557f85df57f54c174b8dc6cd81533f1. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/LVL151700497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96b3b54e28b847c1d2ca35b4d1a3bb127660df20123dda4b83ee1224763949b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1a026519271de26ec47300dc72f7449226bdfd5ae8878d3fa030b585e6e093. 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/LVC491400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e67253153e639d3957329481c66c07a73f3dbdf224fad4738433211b1d55a9d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVC251425582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb511e76b53d2eeaa427156f278be5d377a31355261cdaec71272572f009ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffcdc6504cca499e8f276af9f749ce7312af540ef323636f4f2d265a73e8329. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/LVA101300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd15520f8016c018a8c329c51bb1e02744e18d46ae459ebc073465bcba07991. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/LVA101300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f0fe892955aa8ded5b4a17a24c82d5ad2dc461ba8de30109bdd2e02799c30. 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/LVA100900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895a2fb27b96f7ca724e24dff40a8a6946e6fb26fd2fd2f9c86915191960e557. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/LVA101400242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337f1ff180e3421c7677265e97c9f36a330553ef01897e5f8b52eb300913e05. 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/LVA100900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f9a27ed0b34c30720757facbd251fdf74133ad93e6ff1931a7099cd9d2f15e. 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/LVA100900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac9ea096f0bfb1a6f23fb6447e4ecf220dfe8a2f3e392e0fa5f0b6a3a21d99a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA101000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c56ec5250abdd3be8cae396a08d37124c00ac59c7e6140c82c4e8c05bac55. 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/LVA109700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97049a2f29dab4375fe020180e72dd29aa024931931253a04678a66383082364. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVL151700509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d27db63b5ff1a4f88ebf075c9b7fc0074f9eafbf511304b8b211cca1ebd054. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA100200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7833288f6798b2ccc44e9f7db96441939368e048dd76962d4eb58dd9b0b5b9ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA100600292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76c1955ea878ee5fde999b7a97a6310f406e3d2134319e8a57867a3844b61d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVL151700562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2b0b3ad942f206d08254f83fad2b24e3b2d994e68b4c7aefc64c11a2c00702. 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/TCAFY2152322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c9f88daea9fab0888ee1ffa7818b9b580f7c217e8107d966ca4867dcd75edd. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZGWX2227430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f13145065d6ab4ae6cc290aa680c27d8f17514201f9f0654b6fc58088a8ee3. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZGWX2227431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab1e2b2db981588fdeb585039dac387d2101df2c41aff5917df6335c01591c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2227444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95dc4e87161b491d243f5afe744bedb66b3d4d72fab46b0151d47aeeb624202. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2227447.