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 0xd07e96a506a7d61f290135c67ab5b7fd4904debdc7a42fc9809742bda3b0c2e0. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e81a728-c398-4dba-8dcf-6c5f29775c9c.json and https://artists.proofprofile.net/proofs/artist/0e81a728-c398-4dba-8dcf-6c5f29775c9c.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 0x1819ef24e95ec0f9a0088c5e4fba7c9bf905c0657ed48341a3ba4ceb2886c261. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES64E2489836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc6a221bf5d46a4ee31d75a978a9e53d0656b84e934f53e0b43a92adfdc3eb1. 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/ES64E2509217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e25cc826b1bfcf57960b2f64ddb62caa6851d1b077a8fc8fca86c062c8b54. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES64E2511622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3705939e1d6b7e23ac6a2dadcee95aad3432c464559e2f967f5905012e4b5010. 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/ES64E2511614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd616c7e82358f8164ecefd73bf0b6840312235298632e697eb1d7465862bc99. 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/ES64E2511623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00b07da8dad2605ea8bbdd5d8d61e50d9c33142d7c98596f0895e2de676f2e. 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/ES64E2511616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dfd154c7fd6775a763ad7e41a41f0bf314e1ba490c7923ad73c15da39eb45b. 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/ES64E2511620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c5f930510337864f5dbf552a9b2b0581e662721a5a9019405034f965b55f3f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES64E2511619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463a68af92f996d95db36b65eaa34bdb27667daee09833e659360bab3e9be137. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ES64E2511615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8154876eef55fa1f8ed89beaf12d066e46f78a79a7ebf530236320e194982a. 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/ES64E2511617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50176d80db0074491a7f742df0f8e7a50f7013a9314edb3b807bf77484c2b226. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES64E2511618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e46b0a4000d924e14e3f5e95d0472ffab55f5b110919361b8ac34030ef75da3. 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/ES64E2511621.