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 0xe87b45709b6f01257a3e57e540ca1ca31f5902a6b3a45d7b4ebd8af053c64d39. 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/1a477ece-688b-4a74-ab09-55675e0fdb2e.json and https://artists.proofprofile.net/proofs/artist/1a477ece-688b-4a74-ab09-55675e0fdb2e.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 0x0745b0e468fb6989c6508a7f8837a0ef53b309845e5f3ab4fbced0a5c518f713. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMWZB1810063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e664b4c043b49dff74183a9faafa9247e0ccb036a4141a98e27a7efdc36ecd6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:35:25Z), 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/QMWZB1910999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc490db21e74718d194a559cf3a649d33d8fcd1ee8ab8dc71f96adad126e79035. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMWZB1910997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fb0f4859c2779a9a729462413c155fba90f2ba93d29451bd064af54f212a51. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:15:44Z), 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/QMWZB1910870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c15c5bfd7c75f8723d161379c36b1cb8a190d57d2409a46cd6077dae9c44ef. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:09Z), 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/QMWZB1910547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e1c1f4d9c5724773c7adb12754c26ed75e722934727ce0c7490d13249c26d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CA5KR2002107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe987e821d96fae41600582ca8047c2eaf64dd3c750d93bca64bb1408e5431904. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2044350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fc94e0d5e7dc90f6eab440994847fd59baae660faa82f6a48c5ad2c70ee13c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2091890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16caa4d02756511cd3d41ff9419aaa36e619b888a8ea0df9fd4dfd834b82de42. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CA5KR2124219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe24299b359d75d749180bec09f93e151dd6da2258efa7aa501fd15ebcb39e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR2159615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70addb277589878a9fb9cdb6a3bec61aac5249634be58d7dd6d3c5760a5de66. 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/QZTGW2100479.