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 0x695565b1b07afb8f0364e7b4f209723ca32982e20fd50114cdd119e0584507da. 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/2fb0987c-cb7a-4acb-ae01-f062f8463855.json and https://artists.proofprofile.net/proofs/artist/2fb0987c-cb7a-4acb-ae01-f062f8463855.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 0xe99e979bfecc5ece63c3c821c7b380058836acdea78ccd537c3365bb0466aba1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UYS059600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef3e23d7c8bc8cdaea69c0a19978e027cfb4c5b49453e7a3e83fddca0dfdba7. 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/UYS059900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6bc2272ef320808e8395b9114875fbb862d508bc7ba0ce7ad0102cd74860b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UYS059900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135a28da79ed4844592ec86fa0244029d0907c5fb1ee67358983c828269924c0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UYS050000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedddb73eb744bfe8607498545fc8a7582ccd59453eb8a4e19f4a7b3974ae9f9c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UYS050100468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2fca93fed3fef4acb08ff916f17bddc3144f7d33bded63b5d3304e93fec7d8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/UYS050200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ea96c740b30ea814dc49afd85b21ed795249f2ae93636c20822209a557eba4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:29Z), 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/UYS059800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b934cc1d3f926f4994c576c4cb64db24eced63f0a01ebd287ba37b3c8a555bd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UYS059900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef3e23d7c8bc8cdaea69c0a19978e027cfb4c5b49453e7a3e83fddca0dfdba7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UYS059900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01cd4f168e01ad1767dbbf12b86fe2a599aa8a623b61eba09433c4832108ab8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UYS059700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352a9c155768aa3000877ffd45d8ea9b5c50abae2f0500fc96993f8c039da377. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UYS059700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65901637ea1298c55e9f59867c662e9c61b0cfa4b6392e05dcb6f8d288c33bc3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UYS050000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e82f90ae21f65dbadb26b98eb02fd0a449f976ff433cba8dc5beb6de7613f7. 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/UYS050300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493bc5cfeb50c5a7449dcd18df9047aa8d45a75fe8303f54492c439ca077d69d. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/UYS050400119.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4f12e65d7dfeb9fe0244f8261920519de16eefa0aec719988d8b6bb0c4ef84. 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/UYM121201132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5fb527183fe06ecaaf36624995a1e8fbccbc829652e3173f7c6b41a03b853. 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/UYM120601352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d38ed730536ef86a9238816bd526fe4fd55aa4dff81fb50178336b8382b5010. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UYM121501514.
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 0xbdaa0a897d2a7feb076aeeada4f2b32ae06675b4555cccd765c92b2bad16e125. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/UYM121101587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb4db6015a929ec159716a6a690b06b11b64c471f4943b6d196b4032f303f9c. 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/UYS059800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fcf6f76cf4b6114fb390c6b30958293e77cae79f826b3ad48fc10b842b7b90. 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/UYS059700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8576d5db7f96c0cbe5f71645dd2d549af5307a0586e7d7ae215840e953a126. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UYS059900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e09faccddc16037addc5c263ba3168263b21a445db1dccc3286f3328b13d0e. 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/UYM121401430.