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 0xdfe87e1ec07863552229728d67a0cd39a49a3c4f60b9455b777d0e33df96e4e3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ef6ba1c-6446-422f-bcf4-31e8f747640a.json and https://artists.proofprofile.net/proofs/artist/8ef6ba1c-6446-422f-bcf4-31e8f747640a.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 0x7b3ad356b4b1b239e1d4c3e7d3c4d443801761c3f011cb74c096d48bc9004c0f. 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/QZK6P2157140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2413fb089a8b4825b0066f8c6caaf8a2cdf70a3b286ec7171c28087f600eabe7. 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/QZK6P2157142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f8fb3f2465edd68d6f622c1c22c7c6186e5dcbafc3554070a57159bf1f72d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6Q2167543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3d50d0293ab92892e56d0de446b7ce8b6991eae3077b60a996d2975b3f196. 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/QZK6P2125920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe742ed5719cd741d15a9c16a9a1e7350495760bba3617638c9573dc9d8457aa3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6P2157228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593117bac380e6adfa895b476420fdb5ea99cfe7c05f0520831cfb2bde2e19c4. 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/QZK6P2157231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe988642d8393af0c4db7c62affe0f0c7e35f3793cce425ed3b51c52a7914d. 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/QZK6Q2196372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f568726abca0e7a5f5159c5463ea38f56040e169c0b2602d483b8ee33b9bcc4. 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/QZK6P2176376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b57a0b38e66c3bd5ab31c6fc78541d5085a564c69b2a21996ae214402232c3b. 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/QZK6P2157233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf3849af591d1be1993d98a8e5632133610907d1be24ec338bb32539cd7e757. 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/USL4R2122319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1a0a0f813ba1559bcb22e8a5ee6c52e7971b0bab6d1c8e219ee9ce55900f7. 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/USL4R2122320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246565b693b950d70f7a51b58f187bef11f7aab68beafb6d5e60ed474302c9a2. 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/USL4R2122326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d17f43da8035352328305c4b5e2ce36a99ad28fa4b54632bfe571dec5ae6b09. 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/USL4R2122328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c44a999a8e04be1096bac6d693baea26cedeac738bee85da1e7317b7b456e6. 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/QZHZ51913802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b256594ea0abea3b9b2944fd63c91e81d8c342c05c13827421c30db757e0b72. 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/SE6I32017080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b3ba3f4418f6dd87865682b9874f7e7d47254a146a1c624071766412ab346. 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/CLLH24603291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497595fa91116bf5cd3dcd9a7e901a9554ecccf88add144b79a37df84a66963. 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/CLLH24603292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea65d680e9fc2351ee691e11e411c550594840ec1692842c1fd1954221a729f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CLLH24603197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c3d58551a1b2689a863a33846b4b19e6d2e1aa5671533115d09dee61b8a758. 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/CLLH24603202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058ba226d354bf778ae7ce69f05b6534cbc0d80662cfa0b61b7b69ce5f8c6963. 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/CLLH24603208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd13dde800da1e66a65010ea1c759af710e086d4840593742f91b2a0ad75ecf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTPX2156718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2722f8c67dcd0ea6c0e5762510c49b784e5481993155214f67fb31971b446ba4. 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/SE6I32402212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea36f6ff4ff51cebbfcc7b8fc8545085e3570cd01764924ccc201681cbb85300. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJV2385200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b05337edb3b99d6984b7bb98871553416433a34e6f16836099cb015f165610e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2385204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5946a2b521e2615c22442c9ef4f6959d519774e567ef93cf06ab10e00f02dbc2. 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/QZNJV2385207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55497d49be45f6c2c332cc79bd8592bcfae959870489bf633a03e64d8683a0a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFR2482630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf615a5cc0d0f3735aafd46ed63f1494c498206cf91f347695e19c65dd0ab5f57. 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/QZHN72103509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7976530fe4b90c1873a8e1f1bda67512b2733f4333af3df78f65657244435033. 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/QZNWU2241536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd917ab943da7b7fc24c0de38f32cf460a0e8a6a8b25ae5d95cc1662181d02aad. 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/QZHN32503990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b3ba3f4418f6dd87865682b9874f7e7d47254a146a1c624071766412ab346. 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/CLLH24603291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497595fa91116bf5cd3dcd9a7e901a9554ecccf88add144b79a37df84a66963. 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/CLLH24603292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058ba226d354bf778ae7ce69f05b6534cbc0d80662cfa0b61b7b69ce5f8c6963. 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/CLLH24603208.