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 0x797ded723892b1165b2a7900d87e43e017186750878da3198cf9c28eb0d51b56. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fec91e8e-8726-441f-a46e-8cb182e2817f.json and https://artists.proofprofile.net/proofs/artist/fec91e8e-8726-441f-a46e-8cb182e2817f.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 0x7cd1d6efcef260b260537e41edba347e008f9b3feb962592219c0e8112099ef4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:03Z), 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/QM6P42144982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5502cbe9f902a006cb01b924ccc70b45e5349cbdae93f495735f684248d654e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6P42144973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f0837b5732360bbc8e85562165b67895f20b68c6223530175148039d77aea. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6P42144974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69dd7056dc71f0aae40e29e2b99db58e1ae01bf354ddbd87620847afbff21ff. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM6P42144975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bf006b08fcb241c52b7a02af0099a029aaa86c60c964dadedae206ffaabaad. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM6P42144976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a361c2add856491b4cd9446ffb1dfb40e58d4b8aba3a77ad8726230212fe57. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM6P42144977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3563135a97f41d62cfe8797cba842951ef95e320922599c5a76ca51060d91f16. 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/QM6P42144978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b816498abd5eda38b0b4b1e1030a0985fe3e7e2c63a7867578bca06e55537a4. 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/QM6P42144979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0266b1d7de09f774a9b839fef783feba56911ef2bea8044de2002884006b96a2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM6P42144980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c6a4b1da76202269e07410829e2aa5617f995a5f41a976d31eeac7d7481dc. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QM6P42144981.