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 0x49ba1764a9f92a93cc691da868f4bebafa91b214b71dc889002a6330ed974788. 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/b6e20ffc-f881-4eee-90e2-a09beba86d55.json and https://artists.proofprofile.net/proofs/artist/b6e20ffc-f881-4eee-90e2-a09beba86d55.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 0xddbf3959a83d7f21f5e1f60aff06b1d9d09d64eda8dfef65241456b3a0dcc824. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:19:35Z), 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/QZDA51963552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2338e6a193cc4f2f85558539670fef2b719ba1ef74950190863bde23c260359. 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/QZFZ41978583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef309337ace43d888d61ec2e666d40fbd27f4ce74033b9be25ded3875a052872. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6P1982413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7181370be179aa6ae58747ab21541516f65176294a2bed39846df642d3770d6d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZDA62063842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b42bb4be4e4bbe428b6c0c73e0192deb12b765b75c09d5f72974a11150effcf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA82051740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe1a92ff48a577447d1f825d8ef8eb048a79cb28ce0544623e862b9faad48ae. 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/SE6QE2010205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b84177f407d337483d4b675d84c8c9b4fbfb07b806b2f7c5cab04da6ecb77. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:48Z), 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/SE6QE2010207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e98fbdbc9eb02ac8345c39be1d674f6921fcf12d8488e73b7936a41367f3db. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE6QE2009918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3af00df54ff1c0d9caf60e108200012a56f8d94597f9ce6ff37e566b403577. 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/SE6QE2009881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508a8505182ead53097497a658e8409f45eeca753f7452c0a49faa74c3d1e115. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:20:43Z), 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/SE6I32142038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f591c26205374ef08f90a6f9a7a0fb10abaf8444304ad959d0c45a3c2e96693. 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/TR0012100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd683fe7ff48977986529ee1a49c6a88ad283db335bd33e7a09eb0e6994b2ead4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:37:43Z), 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/SE6TI2189100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa253886d71f5ce73bdf2cdb9a67ffa25471ec6dc2eb72e604cd4d24ee258f288. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:44Z), 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/SE5752273994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460532168ec5e28503b2145ddf81b7d7b9394c78781f9900945d0d0826f9f2e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE6QE2213850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2509e9e8b8eea00df8b805445cd636c85b317a49fdb40c36dfa77d45760704de. 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/SE6SA2274337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde2f8a108f5491f7956acb4358e8a95e6f1616a9cd084ebc4394fbf5c3832f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE6SA2241037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf45e8a68884f4ddb68bf3fe8cc481a5e1adfb1ee93bde72011194e710ae9a. 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/SE6HN2377111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edfc5d8cb6524641a7b11dd4cdadde66ec8d2ddfd648aad8ac8e4aa96e147e0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6I32397332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a9930b6237a25ee6987919db60e046ebeb20dc9a9193794b7b755031b5b51e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE6QE2365716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fc8dd5f94ca5832db3474b6a199e6ef8efb8ec5d7200d77097f6ed0d01de02. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6XX2365662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0ec34e4c20f783d875b1e46badc2a7d61354ea0baec6fbcd6bfd372bd6ad43. 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/SE6HN2406787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4760cd6ba3228de8a7816ff6cc0750c09f0f4c1a93f6396e7616b2b748b613f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6HN2443523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dda60453363055daad49b4b4bf306a782ed679cc73c31631c24d2da0936ea7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE6I32434596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff12b3e7f74031941506aafc7758368cb45ecfff6a5ee918a05e8c01b11a7c0. 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/SE5BU2530088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa68ac5a9df22a051803cace313a238bbe370d6cee1c15559dd72a695c60fb4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/SE6XX2596061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b0360ef648311281cf65be6e17ffca2fdc483917df7a32fcd7ba79437aae1a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6SA2541677.