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 0x88e484abd6c6c1943b0189add7bfe169e8692582453a0e245e5bc087547c0dbe. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adfc0a73-44b0-47a4-ab0c-b0644ec1098f.json and https://artists.proofprofile.net/proofs/artist/adfc0a73-44b0-47a4-ab0c-b0644ec1098f.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 0xd0a530a33a1249aaf7f7c7ccfe65a98102f6d67147dcbabec3816c7d5d4f9ffe. 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/US29S0400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38d5a744cabb805b0f1e45e264dc2338b0de501e8972b30450a0b089d16eec5. 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/US29S0400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1cdafb68bdccdd0f58cd29bf973c3ff646e9b69674379d00669376315c7d98. 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/US29S0400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232add0a18235f9173bb36f2ead31db7f900f87f7171c64346e337c2ca5a0725. 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/US29S0400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea8bb555ad37eacdbb36e58878cc1251c72e2c732a4bb19b04e27262a7aca60. 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/US29S0400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff40e3499990a72db24d48b67fac3bde8d10e37f201b9d6a8b17cd3cd92cf3c. 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/US29S0400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7af3cd3d5f04dffe24b244a81f582c12faae146c86314df84db85e763601b91. 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/US29S0400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709ac131ed73bd18df65f6526449ba8c841363044eb7f2914ec2c6e7a288b31. 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/US29S0400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c70736f9151cf35f57c262978c39b4b31c403ab2f2bafd8699322cc55adb64. 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/US29S0400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e8b657642e960e162464236d710356094402bfe121469d1903139ecbcd59d. 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/US29S0400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe3a3e44f3aeaeb2a17c86ebb2adba54e22170305368097535cf6e4357b707. 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/US29S0400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785ae6fdcd751a99bb7c655003963e3ac676c424a326a6848567bd0c677e97e9. 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/US29S0400182.