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 0x42925da15cd3287e1323a065f900134ad6d39c6c4a9ba6e3dba0831aa784f6ce. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac685770-b0c5-4420-92b8-5d857c8ccfb8.json and https://artists.proofprofile.net/proofs/artist/ac685770-b0c5-4420-92b8-5d857c8ccfb8.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 0x11eb329f66b7547c5012691b95be992568ec2db465f4cce893d5f760eae6d0f3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU1816621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ca0559ea690b87a5977811e1b5b124f9938b5fad662571b84443a8996ef7e. 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/GBKQU1909094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c1ed6588e792b4a31a8fc5a76a71bd5c3ecbfa122a2db26b80dfe6b5073669. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKQU1964999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d4d4bf94903b05839128b8273d4e1fe6b9fa6790516f140dcee76c29b2a11. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU9083331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cab96883d5a0060eadd49b9f91f62885f63f56be8c4a0c4857cb0161e75711f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBKQU2128725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25db5fad08f2aace95b3b5c79122a1cc63d41fac93da1a858972271094c3d09c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX89G2288893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc028c303f8f68d13ebebe295cdd47cfcf0e6da3ea047ff78071983db6fa5e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:09:22Z), 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/GX8LD2393001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66457d03f5b95e9d1655473b4d425911e01e2eb3cf7e7f3f369e00f9ed552d40. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GX8KD2491764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947c318affd8a1928629501ed9fe1c060a1c8ead6b7f9c5d3b8db56dedc7a8c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX8KD2482740.