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 0x7794dc82a262af486bc608496f47872926498e6a62b7dbf66ae5bcbc0b836609. 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/03baf0d6-c9c3-4c44-ac5b-b501ba420881.json and https://artists.proofprofile.net/proofs/artist/03baf0d6-c9c3-4c44-ac5b-b501ba420881.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 0x83975051a52b878e80a73d374b37edb05b35d3157a8c32a0ea5efc63d008e00c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ22148607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673d2d714785b59b0503bee2aa6ec3a018e86c89654019166656b6c42d958a4. 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/QZES82175649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378f8c848cb312daa9b8cfa2e0c005b7e7c4012ceba032d7c26cf6723245e4a. 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/QZNWY2184555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45e55a5646f58d3324c890aeea0add472be9d506c1f4058186f3413150ef5db. 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/QZNWY2184557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cba38bab2260214d6af49197aadc97556adc913df4f09eb43c10248420d230. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWY2184560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd082d1730797849e19fa61f77e8953224fe831d72e2739a40e218bf6c2f845. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWY2184564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d010a8d3cfc90fe68234442336612c50ac9ec886051808109cb162efd07a88. 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/QZNWY2184565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9803bb0ac696ab30b32919db6d09d436df28d434527a96ed81b8e870488539f8. 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/QZES72341334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da1058fdc57418a33e615f32290733b133acbc251f70ec0582136645d31582b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN42342228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252bc6eb6f07e6fab1f3b4d3f9e5617450e0c1963269385d3c62b469f329166. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES82484066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbdf88855dcdc0ce46d237e6158ca472dd6b4281e5c6f9709c80a0fd1b58d84. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES82484067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08f60959f77e969ed3f9e71a9f16930971881887cb09a9477c412719babb6b4. 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/QZES82484070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa467ee46c24cb97e96721e578c2205729d3d1ab2f36160b03bf244a9ac5dfee. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:17Z), 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/QZES82484079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9444cac94ff306c9e4e6d0d79a958b2f02e742672ff36a724aee813afbbd7f5a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ782418666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe88d45fe4e247e89ad6411dcba104f6b844aafe95d2b64e0ffe1b35ad7a68c. 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/QZFYX2166993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d486ee90b3e20faee39d021f2d0116336b34397956299306d1fa24dc5b0af. 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/QZZ7L2480665.