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 0xe23330a92edcbf34c17cfb04c9eec8892a48b0b51d1324944d9379d47cbc963f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd4c828b-7f3e-4639-b7f9-5c6c17ece970.json and https://artists.proofprofile.net/proofs/artist/dd4c828b-7f3e-4639-b7f9-5c6c17ece970.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 0xdf6c76e080f28ee775aee0539e33bdbc8f8d454d85c05d54b64beb929cc6668e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GX53U2596046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3673d375fe26ea3fbddc0abcd038677d74d1cbbe0bdb7afe91c3707accc002c1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:35Z), 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/GX53U2596047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dfc1b4cb201fff4e391c9802a2a5ca1924ee3273d25b78b1258639234b2da9. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GX53U2596048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21693681be2ed78dec43d8f016b139fdefcb9fdc7427043b9eecedc6dbae742. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:37Z), 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/GX53U2596049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2589f728a00f3da4e6493173d041f6ed70c9e3f3b94d46838a522e8e9abc5. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GX53U2596050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603f3967daea3d3f5b80097ec1fad0d1b8aaaf605425c74851c239fd55819ca2. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GX53U2596051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30937a933ccc8b24d19738bdec63c151ac763b2ff6342c4ef465186d9716054. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GX53U2596052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd4d4e3a9ba278dc65e86dca36164247d9da866e5c6a1eb1b50cd6ff7e3871. 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/GX53U2596053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cec616e0a607abc3172bb76e9cdb3975b2bbf305e0c7758f45d5be05c530a6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:53Z), 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/GX53U2596054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8037e15d5b973d76141970029ad8ece08b0618fac9795e99d26a473c86ee055c. 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/GX53U2596055.