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 0x194bca2da1c26d2bbb921b467d4b2f9c2b949825ee6656de3040621b8eeff67d. 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/7edbea41-24d4-403c-8dd9-a9d885ba673d.json and https://artists.proofprofile.net/proofs/artist/7edbea41-24d4-403c-8dd9-a9d885ba673d.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 0x42b66dbd63ee0f5877380a6750f087c7ae6f1d2a860d26f1780d2361ba63b04f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:54:21Z), 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/QZLL92243534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122b1aa2196d23d29bd783fb1b82db364d5e592ac15e0b2a337cc467dd948cd8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:34:40Z), 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/QZTAT2318975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8901a577cd5097efe4975af4631365936b55d2f25174f54772fbb96e5dac0b6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:57Z), 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/QZTAT2323083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad639ea5790668e52adfddf4a8618ceb1caac9619e87faee0e13557027a5429. 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/QZTAU2387334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a7ba4f3504176d6184d29eaa07f2372e33b5b73dd58ae86e2f0e3779054b5. 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/QZTB22316752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3ac60feab1fb4c86a4554d428ace08bd601660075e8611de01cb0b8ac5fc0a. 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/QZTB62376861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe312680da8ef077c0395a45077b74a4a4bc391fee339f3eed99005ee730f3fa2. 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/QZWFR2323359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c1835b6b6bbeb269aa968cb197c7eb3e734a9ae8ecb9cc8b841953ee5f3ba1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA52417429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3429727f2418c45a8e44dea2641c6c7d1799d8528c87644857b46f1566c41ca. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHN72435476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0370f7d81d21b04ee46a1d55f5eb79a7ea55a2e2f0c802642b3345cb8cf090. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZK6P2452562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332c3c06fc9155a28a1c875c60c97ac3d5e7941ec7af9e0c6cb4baa5dfd591c6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMER2429699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8ac84c7a83fdfc5a405cd39e70e8f5e18a5dad5611d9a160c8131ad656f3a8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMER2429700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a158a2a66785b89a48121a27da7902a3d41a7519bc8bd4cbaf64e650e7bab2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTBE2466862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b231ff262de268bc06820129795f3a42ce24365aa7905f9214a873cf9030393. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZWFR2466254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd7d58183db5e3fb2cbe36a9ba0ec97e551ee76b33835713e8540c41f1afb9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:07:33Z), 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/QZZ782428518.