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 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 0x4921ab36ebd3edcb2eed5741415646a03cd73fcbdd113aa55de7c1a1d16f0fcb. 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/ed7077aa-d8bc-4f1c-b1fe-9bec5fa650fe.json and https://artists.proofprofile.net/proofs/artist/ed7077aa-d8bc-4f1c-b1fe-9bec5fa650fe.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 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 0x707f01eea8bb7602f8da5e22ecb426204256f3a12084b174694a9c5f466c261d. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZHNA2291279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdad41b64136a006a4b87a9e0600e8af5e5a2aa5c004d50e90f473297aa93a86. 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/QZMER2245430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254585391234582d5410dd2d5bf67c21567f584df80583e3f333b914cfe0e726. 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/QZNWX2219013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf0e88ba0b9ce02f0dbae58e947edd7a9715ff2177d1227bd5a7283091b8c90. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZPLS2285427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba307b8f3d294f0ed9dc1c1c96930c27b4fe906dde9ceb6f00555898f8e7ab. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTB42234608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4682f610c287c6dfb93e85abf9c60d995d3f685a30f4e8b0e6d7e991a6aa1a8a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZDA62322159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8b882e57495bc0def5e869c4a0037910d4aa85ab572a0e492744a5c8ca3e9f. 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/QZK6F2369698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb675d54687dbfa3b3a80ce27dba322d05af9c2589bf9d2c630a129be60ddbb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFH2356954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba8f43868c681628940be72592b0fd48b29a9f2613701a66bd461ff3542b343. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZWFR2372344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12859fe5d26ed4ccaa7557ad60cd1417051bc1aa8b3cc8d074097be677dfed7e. 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/QZFYZ2496854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4ec9b11f3cbbc4d7d58f976fbe336b994dc6ca6c0f010b5bb698dbf960b94c. 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/QZDA72469361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ae15dad168c56d8f373f9bbe18d609807f76d0d6285b3aaed7df27ff23060. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZES82452901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab017141743e5bb3a73c7cb029b4c670a123b7535fcf0c4fbee6e5da4573c9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN62483168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7a0151da3314333ff3f5af4bafe98eb0aff6c258140aab61a6cc89b6bdfc84. 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/QZHNA2424515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0fafd6127f63dc99340bd8f32d2f195b60c75ccece2c3ec422fb6f23f17c1c. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZK6N2464391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a28b3462cfad7a6951594e4f1456c2bf34e02101bbd03323a745caf9c221d7a. 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/QZK6K2461545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cde60855536c207117384719fd61efd5790268f2da5b0bd45481f889d112481. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZNWT2494036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eeb4ffc869f9941d0e4ae7144a48049ee059f970b0d6dbea65a6e902e6cb45. 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/QZNWZ2419096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074f68e4624f69372afd2900443b816285284783738a15487e262bdb42ebe1f9. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTAW2421667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71749b8f47045bdc9bb159f8f1898cb3a961b3c1e31345b882cc9b40fa3e5f20. 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/QZTBC2415535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e4f8d8f6a99bb4e5675cccef5a5d141887266f38c1af6e3366e1cba82974c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFG2403136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e65a44fefb19d2c2bffa77ecad876fe1027e16383a68dd7a6936395dbbf5249. 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/QZWFR2446580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaefd3110596ecca8aaa75594e9ce0a752310680cf5c8602b1e979966e77770. 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/QZWFV2480174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c773aacc75d42aae14eaab0e14706ad7e804be82ff8eec689a687b70609547. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QT3F42419820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89a09b557920423e4b09d821a8e69cc286ba3037b143dedfc2e71c1141d0a8e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFZ32590095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c445223475bf7d889bd68c8b96bff80d1dc46eb08536cd9efd9f8eb0159c70. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA62583041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703bd0e4273f2ed6338abe41016fa8029f834b2386b0fb8bd550de0fb2e04c37. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBC2592300.