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 0x15e372ad18253e66b313e64e163be298d101db203545908616143fb8da5b71bf. 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/f478a3cc-0cf0-46a7-a71a-6e44d9c3fc86.json and https://artists.proofprofile.net/proofs/artist/f478a3cc-0cf0-46a7-a71a-6e44d9c3fc86.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 0x0d7946dcbf9f84a43b8ef8543f79af4a17f25edc4c00f4c0a1fb56be4edfbdda. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:18Z), 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/QZK6J2226016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b48c08e1e271ffb461ac9a8d268a0c2827d63f2850e3b81da8de73de00c199. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZPLS2302066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8afa287ec80b848e7d688e40c48ca5ff956cc15d22fa32c1d7531320d0c3c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:48Z), 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/QZTAS2327478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870e8401f3fe1889f3a3b3ef92eced7f8c8e6956b1cb45caa5b633c29afd7d1. 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/QZTB82365288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b058a99a194cacb0b6712e3d2ccc23fc74b429ee5685486efd4c566f38aa854. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:20:32Z), 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/QZTB82355928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05894fd68339217877417f57e4ed4d393569e53895b2345f5f67d5d765887121. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZTAY2325957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64777ee7bc417a4f23755075618bc6e7eb7cc868c2c7c4d80ef1c1db4ee9154. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZWFH2356736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98207bd35234938e4ca61a96befcf7c3698d8803203621c5e50d4dbe1358aeb0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:30Z), 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/QZWFL2310677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b30488601320b5789c0a19f84d3708e1ddeaf1d0927254575528d32a629288b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFYX2442511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbfb8064079bf20a37f75e3c3eb13a675a5414f0b65f606b5317f1336aada96. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZES52423440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b18e049cae5a1c716d7946412e9e8a0e33849a124175bb7213585cfe603453. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:44Z), 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/QZHN42449553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe036896e6fdba5510066d4d78a2fb4a966a1faa8381f4a311e9543406598f68. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN92498298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bcc95a8b9b116ce9c38e9f150fbd5b0bcdfaa6c1228dfdcd85870534479cb8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWQ2439607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020e2381e7c60fcf9d999b410012c0849427e08d708a45d1bf9710bfec6c1c73. 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/QZTBE2431300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41be5c552344a212073d52cd342638c6bbe166f74adcf143568e60845eee9a3b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ42547528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a69066db6848c276d34c3e4fff50a72539ccc4bc0ad492f5f89aa9e4a41b831. 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/QZK6M2495401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d839dc810ffc5777cbfa29c6163097003fbcc99f195078ee73f2889b5ae5d24. 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/QZHN52251374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c65cc678c4132bc0ad6958ce3a7636fa2f57867b12a54ffe4c44909ad009123. 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/QZFZ62442103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a8cb1677ae81a9ee0415385feaea3769be97e854001aace39a18668d520c1. 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/QZES62417508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3990be4bbf2695ff6c08872341058fe07c3fa0a5c6e48860f7fa102098146f36. 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/QZWFH2486417.