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 0x4b6f0ff9dc1f2784fc50cf3eaefe972c29be4b2d9d6e55b5835cd8fc46225833. 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/9cf44570-20b2-4ba1-8c8a-cc542d3febc1.json and https://artists.proofprofile.net/proofs/artist/9cf44570-20b2-4ba1-8c8a-cc542d3febc1.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 0x44d762f9f8053caa396f28383157c4e65e1f87cf07daa6d6a40c02409fde6da7. 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/NL2NY2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ba59381dbee1cfdac16c32862822c7f64e573b9dc0bc14a7e05549ece618b2. 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/NL2NY2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03119230ee11edbf0b3cc3a278b2a869a318099974c2a96bccbf3bd1c0b4157. 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/NL2NY2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f1975bb5181788cbb2b600359e0fcb3ef0d78de269ff547399eaf0ca69611. 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/NL2NY2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09ec44572ec604ca1dd5130a15c56b03de014ce6fb6f45fb63fa7ef9748b76e. 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/NL2NY2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b207cfebca22b4c0bff7992e08e0136ee2ad9f5a49fde7140b539d45f11dd2. 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/NL2NY2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c485674ca5f016ce0ff81b7d88249b97d4105c44be8aa589140200c78b698. 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/NL2NY2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45646702d6491963aa882f5fae5e2b3748d2cab07146d52d65a0858b1433a44. 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/NL2NY2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2801c852d6d65a4bd05775f94d6b1d21d95b96ed55c1cab90fa93935fc902d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL2NY2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763008b876389880cb36039e76b3a1d27007155b15d7bea290a74b1135db7e5e. 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/NL2NY2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ebeacfefebd971dec3caf0b0d619693d566812863996cc23ad292d26a2b13. 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/NL2NY2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b08b400a0484d8643a9d89c0a41f0b486b2ebf7e02aab7ef206959e3e6640b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL2NY2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba61e42b6a42a147b5b60c3f6fea5e818cb520f7507401763bf34f92fe45cef. 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/NL2NY2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f1975bb5181788cbb2b600359e0fcb3ef0d78de269ff547399eaf0ca69611. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL2NY2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ba59381dbee1cfdac16c32862822c7f64e573b9dc0bc14a7e05549ece618b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL2NY2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ea4f943fd63581c6fbb93ff7faf58de35f79f46ea05e5c2eb321eff214fbd. 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/QZHN72002733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41ba698722c59ab5c2eac2142ff8e66ec76690f2a55ea8660df6a25987afc6. 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/QZHN72002735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9258a6dc21cefe6ddd8687e60d26935f759545e0eb6de9f3aed806e1ab8297a3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN72002736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd5f7cf9f31da537dba906fcba68aaa32aa7282e170d7b5fced87565ca3644a. 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/QZHN72002738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fabc822379208690db4c738c46487bc0ec5b12e46e89f5be91baae6d3e7809. 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/QZHN42072776.