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 0xaebaa348e88080391f8dfbc7a8d722b101b2c50642254fe8ccfccbe04da3850b. 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/21b836af-cc4b-4ece-8d27-80bb92e2b730.json and https://artists.proofprofile.net/proofs/artist/21b836af-cc4b-4ece-8d27-80bb92e2b730.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 0x4a471d71f736e78347d62ae4f17ec92565cbfeed39a46f38c9d00a26750a1edd. 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/QM8DG2448401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8119dc6659c8342459beb35f3f5661a3c17b69bc6bcabdbecdfaa92bd0cf188a. 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/QM8DG2426356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cac2f9ac71045d723d768f42a1bee947583a2d2e84bc45eba86bf56a637363. 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/QZH5E2331081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f3334585cea8683b64b8b2356a62bcb8aec60a27cec3846f516fec18d8695. 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/QZHN42331985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eef3f1b87b01f12a0878cb1b50b6093f0c84a45a7baa236d2f33ba238692778. 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/QZDA52361903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7479f2f5346b3ea900606d6f793b1ab7bfe099dff16e1ad3d2caedbeaab83ba9. 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/QZFZ72335481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47286fb3aa2c7ab04c562d62c80f6c2cdb6f75bd6f742bcffdd27446c123a077. 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/QZTB72287885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca6133ee0cd5621899890f4d3422d7094ff20ad2378230f6f67ebf6313c6b9c. 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/QZHPJ2227789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a777621c0856b209fcf55d580fcf40496f26c3157d42e2eea35fa46eb9f2db. 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/QT4K52501573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eccec91524b9fd8faf05de1a571edf1c1d04e07a32c2a3409fc3222b0d50938. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB32561043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf29b8c960f886015029ace2b720db8d8f8bed4995049c7f624f2c42172ae91. 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/QZK6H2523662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4770c77ec21fc7ffb4075e6d6b59e11e1ce8df3cf0da4df7e357f98d0b780ee. 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/QZK6L2541232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf38fd102025a6fdc5f8f3111de3c204ef154b9bfc87010a94e8fffd89199bd. 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/QZK6L2544412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f7eb18247adb7309fb387b1753131ceb35967d156090d82d7c9af740e9793. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2555676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f32ddffe8c787656524d7dd5d9e38cffaa63901883621fa98d2f271a951406. 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/QM8DG2527515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd554004f44b66645bd95cafd2df8088aa5bee3ee2b0795fe49bf0134948f910. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZWFT2481383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259ca959c4c01adaa774d4c452989e28ff127791ec9514016554bb87249650f. 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/QZTAY2487250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52b82dfc9f192e5f4d39a440ab845172ec46ac1f4c575bad4afab415add0fa4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ7X2430724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0549f78354ff25d8d0231acdd50b45af0751ab2f7c795bf2b8b31144a81cdb3. 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/QZPEW2478736.