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 0xd2b2e7a687d910943a5ad70c730af9933ca74cc4457b390746d9e16608656908. 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/485da0b2-3552-405b-b37b-6ef40dc388c0.json and https://artists.proofprofile.net/proofs/artist/485da0b2-3552-405b-b37b-6ef40dc388c0.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 0xa40f9c4315fb03ce9cea930b4011e23c4e07a4c8c91202cbca4bae0fdc2246f3. 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/QZW9M2364540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27724f4b81dc0b91a2d8fb999d5e048139254c357a2bc4667c09da287bd3645b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USLD91738507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e12331247ea62598ea01cdfeee0f1e90b7f8d68f6192dabb3157790cba2698. 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/USLD91737549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9fbc8574924578df74b113cc9ff9a6d3a42abf023111b66a6fbf0e60f5fb0a. 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/QZGLM2491753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa908d4726577e7bd2f24365e6d211f3dcdb9a5654881893c184751c5d997cb13. 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/QM6N22485747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e53cec68e3a6ddbf6032349bb828a969e91217299d3516d3248fcc89a97fc. 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/QZNJW2423450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e316b12598e65556d557133d0170c639f42db212bf3241a4ab10fc0cc8d1584. 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/QM6MZ2442713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead272da21e2b537bfa08f2712f72161e321004008dd4619f7d4b2174e673c6. 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/QZGLM2481114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8c1404ec58143034cfbd6b431e89d5702cba4263504aecc0966f364bf175d. 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/TCAHZ2438294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0227c1f8a039f4f97978c96a6ea6d325cfc005143404a7405a7a64b80faa3c1a. 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/TCAHN2318293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b88f54463c0db8fc5fed1a2718cc4025dd659801b47621f8a9dd0d9326defc2. 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/QZW9K2336587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cbcdbdbe6fd8c0cad450c94494bb178900831e45a34a6f1bdace571b15f5dd. 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/QZNJZ2395851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73122a5ae43f7cf6c23963a3a311f7cdb18ada262174df06a9c36eec2d0a3242. 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/QZNJV2346812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e1dd99c889ebb1aaf6792ce9cb267a9d4f01808f9ae98ab6d260843d8b1c07. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US7VG2397893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7648b5c856b50e2ada358bebbeae86671f2c7b99e2790bd7d620be85a5555ad. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA62177466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c34ee6bb0571671357287e9beaec4f54fac65717d5c616102ae5939aebc7c. 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/TCAEY2029193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b150ba9981a07acf061d2148b1a0511444b3185637866da78402d491d8b7f. 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/TCAEP1906312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fd0e977dcb5bc8ff385a9315b4227d92d32e3fb2dae189b3960be3300b6c69. 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/USDXS2200730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed27e39791795300a5084bdd6c2d9355c9e955361b136026fe7a06f1247cb4e. 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/QM4TW2430533.