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 0x4c48e59ff9c374c366b73b0aba8d84a5f898148c416ad7ea41d59c37260a5584. 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/ac09ac0f-5dd4-4fec-b57a-51ae674ab338.json and https://artists.proofprofile.net/proofs/artist/ac09ac0f-5dd4-4fec-b57a-51ae674ab338.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 0xda0217dad63de7c5f21a6cf45b995241eed6fdbb9a83558c31c76c91a166c294. 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/DEM092300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0217dad63de7c5f21a6cf45b995241eed6fdbb9a83558c31c76c91a166c294. 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/DEM092300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8042f414be3cbd7d5140d8894d05594dc34393f1e1e9aced85e08937d6a66fd1. 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/DEM092300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81864733c6d14edda0ee772f341d9499ab10d8fe1af99a6ad07d6b8c5f53bda2. 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/DEM092300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d7256222531106de14716b8127c5be18b399b7c4b37db6d2b68ffc87bfdff9. 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/DEM092300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7556713183cc6ba7fe7dd84274063382dea273c69305bd5a65f43f2cd1a7353. 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/DEM092300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0f7fb9e7e264479d29b614941a6f274180884ff70f469d05e13c0eae7055e. 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/DEM092300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3069b759061f3b53139afde2feb2acfc311087fa6c83e0f1b965b829158040. 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/DEM092300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63f604e7b097051acd3d1eb4465c21e2863fb0a37a5dea7bc139807a7741646. 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/DEM092300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a55f4e7d5dbe75b74d4017a1c886260368b05201aa43b3d79fcc17e9cfbc0fe. 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/DEM092100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad7727386d633690a33b93cbfbbe53467814f3c72b23dcaaa39a7fc63d7dc5f. 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/DEM092100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575554b89b86f3ef036e03bf4c829b4840ce779f969cadf3eb64429290455536. 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/DEM092100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cfabbafec58329ef54f659a31f95b2f8b4c357a310349b8cc3e6fcb257c533. 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/DEM092100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8725f07e311b508ce5e1ab2f48f15b3f2fae0703f617e7bc40c8d5b43d9898a. 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/DEM092100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc6c43dccd60477d424b971085d4c6fd1421ff6ec8b6622b4a1a0c563eb244e. 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/DEM092100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178508fa5de3aea7ae8be1ddec49582b8f2e9e25d9f49de790f9cf65e32d0c5f. 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/DEM092100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d27df505a876ec59df62c8c7b4f311e835a0330f13157278a6a7145d4a55a14. 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/DEM092100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b190b065c0e43fd4c9d5c3707385cc1ac5595916a57a53a364bc197347e01e6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:57:55Z), 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/DEM092100042.