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 0xd6686590d0a58d9342a7a1f335ca874fccfb81dc1ad321e786783e7c0d6dab58. 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/f1bb0797-91f3-4791-87c1-f5d27d2f41d0.json and https://artists.proofprofile.net/proofs/artist/f1bb0797-91f3-4791-87c1-f5d27d2f41d0.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 0x52a46f0911aa651de8ba853c55b1a23a8e4fcdcf147d7cf1bdd51a23ca45ae57. 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/DEQ022006117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ea456b3144c9c620fb44e2d8311f4a2f6d3f542b533fd0da1d419af9866c10. 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/DEQ022271636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a35cde965a1da138d0e229b5577d49a709a1449ca79d38031c1829999bba4. 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/DEQ022006196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a015afddb27091b509e3feec725127fdc3e2ca04c1ec8fc67664ca400388b8b. 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/DEQ022006198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b4af82a41032ef8044e6e36726da35fe5aa830c6b130b617f7eb19daff5d4. 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/DEQ022271633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cebe2461fa194155ffd642a484dade25d5797c6d210ce2b03104926dd965005. 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/DEQ022271637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc80b334c4888eabc9e236a1b6deebbc68f42801df111047cc4e176cca86b5e. 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/DEQ022006197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76fb49411e859bffdbe93f8cdac5af5ead48f5f5e237190649059e6392a7269. 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/DESL61400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024fbaa64d86ff0b809185a9e18ecf0dea2ae3b12452f550aa215dd8a3a116bc. 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/DESL61400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acef8d35b3ddc98d15377d53ab8e2c6b4cf3c9ab7c1b073f624c182d4d006d1. 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/DESL61400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a644e99836ac5b77a9ffa59d704f4e12c29c890f7f89064b36a52764a04b9b. 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/DESL61400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b83bcc074ec1e484355652760fc85174f6bc67e55a5064f69e40ce950aa17. 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/DESL61400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6a82b2b1dc2a30dcbd94582521f5fdf7e196a69e2c835cda869b2f461430f5. 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/DESL61400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e9cb38051911b30b77a9f30c22a5e07cbdbbb63257a35348e79971898f3def. 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/DESL61400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a46f0911aa651de8ba853c55b1a23a8e4fcdcf147d7cf1bdd51a23ca45ae57. 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/DEQ022006117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76fb49411e859bffdbe93f8cdac5af5ead48f5f5e237190649059e6392a7269. 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/DESL61400033.