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 0x3cb7ff03d5a4669a12e3028813597b33ba4039d16cf984a51e25da5302f58106. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e25ade30-448f-468a-9a92-338d1d8aea0a.json and https://artists.proofprofile.net/proofs/artist/e25ade30-448f-468a-9a92-338d1d8aea0a.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 0x28ebc1e7358cc0796005e0a43d94e3f87ae3170f774070b35b5e585c754c7bfc. 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/USUG12001245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1ba861fa2046b2d9dc14614f5679f9520083199b36aca96af76b1cccdbf3a6. 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/USUG11901807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f05f47504bef2ca7037bb3e58789fb59be54ac130b53f3d9a90984b05de06f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACJ1541879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136f21c4a2c081a24a144b4af71f9e9f7611489425122b1346a96dc793013932. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACJ1541885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89191b7f9910fc9f95585df3b487e371c0001e01bbcf1ca46ddceb03073768. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACJ1541886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfe68b40079322c993a59174db6721a2ee0abce6c920bb2d962aaf4b600a21d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACJ1541890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd108104f1597986719612fc7e91ca3fb31f1b090484f86cf335be5a581e6842d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCACJ1541878.
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 0x47692d4b0c19f11298e15f4c791c81b1f97152d0c14541a7564320ca63584013. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCACJ1541880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3dc28855c44cd4f1d3acb3c2ca0aa90692e676e98fedae1ffd8cf4c1c52a30. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCACJ1541881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb69aca3dfddb84d53b26f419bf1900058391d7af8c67f4e197cca3cfd455a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCACJ1541884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030b3fd63e62a21bbb98859acc371c7ab67c8bdcbc5f081033ad6423bab0749f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCACJ1541887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2af6f2839062bc1ba61cb1064cc2a9e4fe5efa6752bc3f4cb5faed2bc5986d. 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/QZZSG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6325d901d084e68153853412897140c7570784c5c9728979d113ff6f095a4. 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/QZZSG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b087aa3e65177ed44fc6786387d735b19e806d044213761d857753f5556e2b9. 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/USUG12105404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae34c8eeb8e47ce0b039fb8b4ba1adb8a574ce68a2b9916503d3d9feae6f15f1. 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/USUG12105520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471b06112c7b9b18911cb680f310d3a5788b17ef61db10b0f50c1746b4c16980. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USUG12105519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac5a01399232a3374ada858b969602671935c23d8a572d49e019337a8b3cbba. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USUG12105521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69209d1c4d92ecea1a70376f9363c9ca2ae757074e19e662df4072d5a960801. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USUG12105522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c2e2fc4e09e0fa54e58fad97d9cc67f72d76ed58bfbd880e1a3e39f416f21. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMF921850075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ee328f3fdd63948885ac663c9d02e792e7e3b4b6b0fb61f98fe360da373c2. 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/USUG12000464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02a3c902ee86b24e91558848db6f5e26f5a6170737f386d5f893057dc47c29. 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/QM4TX2258099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1ba861fa2046b2d9dc14614f5679f9520083199b36aca96af76b1cccdbf3a6. 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/USUG11901807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686ee2fc46b220562eb07f5c29ca62d14f73c06bfcb2202f98f14767635e308. 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/USUG12000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed014476ebc9d80fe8ad63b50152ed6a8a46bf284c1cda8b12625fcf4a33f20. 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/USUM72314360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413395f53c1e9c4f317cbc3e4492fd4d0d5fc27949d39793a7b4b9a855398fa9. 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/QM4TX2258101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43eaa580f1ad63f99f3a1026fe49f7f6bef602e8e36acac66f0cd9f167fb152. 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/USUG11901811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c04a7c9a746942083222c52036ce6d012100acad05e3e06b358650972e950a. 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/USUG12101386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84270c8ae71436ba8f18a92fce7345a93e31fb48952b0a5881a6d1ad4d9a1b6d. 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/USUG12000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02a3c902ee86b24e91558848db6f5e26f5a6170737f386d5f893057dc47c29. 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/QM4TX2258099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02a3c902ee86b24e91558848db6f5e26f5a6170737f386d5f893057dc47c29. 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/QM4TX2258099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98df3282a9dd2c952f582a63c10a2fe1e35194b823550814917d0f67143da6b0. 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/USUM72408652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2b870c900c92486dd27efc7d39ff171386c6eeea089df23113c936156ee253. 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/USUG12003996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25fdab33d4f576f5edc20978de8fe8abd7f7982332f1400d086905dcca50fb. 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/USUG12101388.