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 0x4856b6127258ae9dc587a74b349b023d4038894cea405c42f6d40be368a1cc4c. 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/ce4ba2f3-3a7a-4418-81ae-83eaa4402c44.json and https://artists.proofprofile.net/proofs/artist/ce4ba2f3-3a7a-4418-81ae-83eaa4402c44.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 0xf32b36a69d86c914d8a61332cc977dd1758b9d26ccfa12f3339b7f51793a4c18. 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/QZWFR2339169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68272060ef38e08827367534e3a09e3d742f963e630e5117674c5c464a1e5129. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFR2339170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c4184a2048afe79210de28260c5c6e7b4afb9300d617f76fe7d7828b0567e. 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/QZWFR2339171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db40c9d37e4cae6846b8f80a8b05ebb3b7956784e25484e46cec3c7ed8e0433. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFR2339172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd63a8e303cd8c0cbf730267174c16a991a998fcc4169b5d5713c6431c03753c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFR2339173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca421a33057774f02b6bb04da8d56b7189e867c41b2749b34ee0075a396cc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFR2339174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a674db8c5e6b9c6acfd1b9c78cee8e6a4313f2908a332048344fc6b41248c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFR2339175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9955c453c07fe243c33947c15348c77eef27df990a8f75e22de0ce63d9edbba2. 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/QZWFR2339176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77e1f0ad97b3854b5d2396b461812e24b77191babff3dcc898ccb79cd1bf09f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFR2339177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c02df99fed4c68d047e2886b5cfcb97105a654d27076d4ad520f8762967c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFR2339178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0295dec3d6285134bc7696bd2fbf7873a3dabdda0db461a603c8dcade0cdde6a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFR2339179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f288f2539457bfc3a836e47573215a6d644b497ee54de5383e9f3183f93f96. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFR2339180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00405ba769a65a3d034a1c3f7f55d82255eabe425f8531ad3955903ff2d81b2e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFR2339181.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541811dd0db7bc925c465ea70a74ff8d98bdb7cd37b12ec779a1a1e4ff652f8a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNC2276995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80089c06cb9d472c98fae65ade130762095dd6e1498d35549790c0f9d75c208. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2276996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3526ec65916d59fec1ad4570982301f9945cc384e325c8f03276d4b8bd9e09c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2276997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6e2cb8394ad3640e24c5a57e683fd3130ab32626b4c8309f0f5d80b6b262a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2276998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba260af608382d711028cc59535c9292dc924379dec06884cf3fd2818df0802. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNC2276999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcbd671a997fae371f26dd3276795b5a2284b027ef19727d72c1b17534afd57. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2277000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a7b86823badf71f403022a57659c9f705e0de5da0dd5e19328973c208edd97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2277001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dcc7e1a6659071cc2689f760445fae7eabe02b2cb583534bd0ed83966e0519. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2277002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebac49d49665cb2be875193d5d838d1062674a86e7caa4c95c165898bd365a9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNC2277003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e398ddf94af81460812f22843bfd935fed62ae112cdb1d69e609e00e387c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNC2277004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c6c0820f0e07c0b2d593cb587d995c7494267b7aa795bc5627a3f5516a1f9. 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/QZK6K2200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615cec9a914a485b3e62fab680d0470d5c6050409f1459a558cc37e81c2c91c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6K2200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98566df62ecf38376178335688cca01de8ac1209d4c852c3ec10588d6132f9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6K2200829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc1adf07d34114bed06dec11bd444bae8dc8953c81e0078f754fbba922364bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6K2200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e0c1a48ea04ceca223617220f739c2aefce3bfd36490e57e203c7c25532a88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6K2200831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc311be8446330c49c99d64620f86e948f53e2b27d12f67c21776d351d17e1559. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6K2200832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8680d4336071fceba461e6f868c561b433a9fdbacd9671d6efacfbc471602. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2124355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5916a934873531ec6e025dd58197901627d6b19c488c9f9c310a004a3c5cfd26. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2124356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43146b6ccff1783cc9a171aaa94979f56b9789de16842633fa3ff0d0e677804. 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/SE6XY2124357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c899005957c4af9320228a3fd25f8d098098ca9a2e64cb740e04f420747457. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2124358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b18d19e9d70d37724bb92aba55eab6bbefbf89bca33fd98a2f7768b3505b19e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2124359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4981e886a8e86897d3290ab7e51a8a806a475f2c46c315737954effd79e41c21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2124360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c6de0d4465a6bdb731427bb38a18a4fbb86ad8f4905ad6c713a5f8e39e9a0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LD2245937.