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 0x86b71d1d819a64137f6f4cdb9ca4d6d80e65b09acc59b0d6d38e41b7387d92ad. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b5ff4e6-c00c-4611-a307-77c693f70fb0.json and https://artists.proofprofile.net/proofs/artist/1b5ff4e6-c00c-4611-a307-77c693f70fb0.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 0x6111d99ba3c1725dd61a8616ad7c2e09bb6903aed47344da946a4363ed786ecb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:56:30Z), 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/SGB502323700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b6ddc6173cdfd1d377b57695ee6a4ec6592622acd70cc29cb374ea40d78c1. 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/SGB502323701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f217f354fc21c4ba97e08ce8d96264472fb9bd047c9f2b23939eec430fd4b4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/SGB502323703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0270311896b285c86e78dd7a3ed33c6919739a9ece03a98ea5be3041dc7db1. 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/SGB502325075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31db5fc43ee0f3b6973bd6c90b35d28d9095a0d7ca8e6e221d8aaeaa5bcbd3f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SGB502323697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20f3188f57f8c34d01c2e1c97519d1055f015a37ada626c3ce57c880b1dd4c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SGB502325516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138ac104100459ee780394eb94b28833423f014685d935b12630a5ad2a6851e8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SGW502352826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db904310f89af91ea1720192c6c6e17100fbca1dbb367346bb7cb0abfe9cc2b. 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/GXBAV2415738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa524ba193ebf9f705c0181515073fb269181bddecab40850b84ba093565dec7. 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/SGW502536422.