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 0xd5f942b1094185fc10c21f36c0bd096b6cd85f9dc86aedab66be2285eebcce67. 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/edf655d4-f063-4e2f-abec-2238dbf0bf7f.json and https://artists.proofprofile.net/proofs/artist/edf655d4-f063-4e2f-abec-2238dbf0bf7f.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 0x34bd8250f8eb7dabe8a34b328b12f14d6978482ca66e2ffe88e742c626d8a9c3. 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/QZK6J2488576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2b0aba99adaa80bbafbe3d3c34a50bf99ffc03ce9b77e7c6bd291db97547e9. 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/QZHN82469442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fb6c85c3f3326395606bbfe12576f6e0e3f9b2c869c5d3929baf92d134bf96. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZK6J2488579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2b0aba99adaa80bbafbe3d3c34a50bf99ffc03ce9b77e7c6bd291db97547e9. 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/QZHN82469442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455a88db7bd47e90b9aef2cb7574f5161faf629f8d3c8d541fa4a0d159c37ccb. 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/QZPLS2455148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804f27dc44b2ce3e8cc8169a0cd083ccfe80990a635745b9087964bedec084d9. 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/QZPLS2455147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0164e0561f0b210a255bd3317669e8938078deff10b3fca3128ed34c7b63b81. 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/QZDA42438377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84f5193ffb5b7212332340d284abc691591681a6f30f7c51c80ab23cc7a8c3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZDA42443805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293be54979e9dec6c65781844c91a463d557f5bc126a475d7686be6e87577da. 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/QZDA62400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f250796b85345a6e70e0045c13a791456b00273d9b38b2b30628af5b7d00b. 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/QZDA62400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f794ae62203b71a20358ee9ba7cc5b629820189b4c8f4ac9c3f92f73714e06. 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/QZDA62400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84f5193ffb5b7212332340d284abc691591681a6f30f7c51c80ab23cc7a8c3. 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/QZDA42443805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0164e0561f0b210a255bd3317669e8938078deff10b3fca3128ed34c7b63b81. 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/QZDA42438377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69358486a8d056562b7baf82f0bcc06f48592edc02fa7608df98490db1e0bfce. 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/QZK6J2029637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef88782aecd753895d10f8fc200fd6d7ffb8b3ebf679c20e9bc8c3dd350dffc. 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/QMRY41901017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3ee58e1541b8948f506a95a0b57690d097fc90c1007c1f88bd68c7c1cccc05. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHNC2034923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2921280e7fe763566ced14042dccffe18e5f788340e5fc36a0954dd393712606. 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/QZFZ22004473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc43c7c061e0ef4066daa82c725173c098d8631b1850b28738ce73e7999bd133. 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/QZFYY2076599.