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 0xed13c990f2585b0d59db7c413cb1e8e7d98205616fa566628fc98abe795f3392. 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/a1d2d5f0-8563-4811-a49b-a69161eb5524.json and https://artists.proofprofile.net/proofs/artist/a1d2d5f0-8563-4811-a49b-a69161eb5524.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 0xb10b593b156fb03f2ce04abb908f7a3b09ab37a0acbc79a64af61ff7283ac50a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAAZ1163013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56293b2f5c26873113a265fc0f7eedad68232f957ab4295652aaba4da91c93bf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:57Z), 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/TCAAZ1163015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e275f86a7c5215ca4c400b28b9338b3caec9a120979c0b3f31e6f3267d8b2a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:38:37Z), 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/TCAAZ1163016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93935baddd552afe507a47a8447613052e01d5a61a8c4cb95ce9c0e0b40f0bc1. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCACP1655203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b97f06fd4659f1cc28eb254c59eb3d63a7cd65f3f08cbaf57797c53dd8f2e26. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACP1655204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a634ec8c4100165c1e0f4fa961b2e8e9e50515a8dafc4505715289186cf58c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQN42000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383a4b3abe004ee012f604c8df65a40e5f3e5592d8af146d2ce3b7d031f18262. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DEQN42000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f1a38a7a4e042a3cfdb9f6b5cd1f1faed45b635006ccc9e00a8f5d4a8801c2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEQN42000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe114b5f794e027738f702662ba4fd27f2b5077c29c90516dc1a421536e483291. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQN42000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc229abd4740a67322d7262b2226bdb3b7d7d9d6a7b09ee1f25e4083585310b1c. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/DEQN42000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b75bee4f80f3b7e30ee473c5ad89e9b6ef24dc662faa00cd6a38b4bb0c5910. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:35:02Z), 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/DEQN42300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e12fc209b669a9a01a6c673045615d47b7079c6a7c2daffef63b1099d26e88. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEQN42300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649bc78ad331945e79597fbfd2b35e6d94b291a258da449b03a4d968f9ea38ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQN42300028.