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 0xc276e87eca37c6af4cef5825e6648ea281f0db9f13a90601183a879b45fef4f5. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72956c4f-2e25-4057-84f5-e0e45700c961.json and https://artists.proofprofile.net/proofs/artist/72956c4f-2e25-4057-84f5-e0e45700c961.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 0xae7cc309102c3ee18c79d2e311670f21b741f9ac52563568219f51ed877b9838. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:43:47Z), 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/TCAJF2563571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0977a669423148316a3e6ac411b535f7a6d81155d6a09ad6487fa27be8244892. 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/TCAJF2563573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1c0a08f9c438dff38758f3267408780a30f099ca251e525f63614666baa8d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJF2563576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d0062a8ed0d0ca76eb883ed5405774d7104b9fa23dc2eac54964b823cccab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2563578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401474be0651309b586be7ed9d96f16ed337de54263c81bcb7899811f1e90b8c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:12Z), 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/TCAJF2563581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010f3ad8f2037b50a1cbb30c482368a0b32c21a78f5714a3c4ecd5f6d5f13cce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJF2563584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46663207f3fc9b27caf3403a81acbd99a4d443e3e7043da70f1a6203aa53c678. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:21Z), 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/TCAJF2563590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426355328a43e583b867496253651fa5b354f2a1d549b3a9208ba5a59b4c2150. 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/TCAJF2563595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cd1bdb489f5c4eb19574563299849acea1a43325fbbf739bbcf79eca318151. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2563598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cce4193956da17b351563eff2ec0d4ef1bd9743470f8b5717b2fdcd980a3b2a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJF2563599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cee3bd85c5ba75f760c9b1c0e5fa2e1d87087abde312762097c1a8b5eaf494. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2563600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc9bafce2f6fb3fead8e8e6f8fc35ea14ded703200e79c600f4830cf3f6e0. 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/TCAJF2563602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f703092937e4b0c34f1d294ba2c4cdc8bac55e2b09b2a07285edfdce272531. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJF2563605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7a6ea9ceb89f2da306154141e0008d85eabe02afa2f8a027ac639e6fed3b94. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJF2563608.