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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46965eead3e3ffe98b4aaeb42951ed04de11624ae8badb507047e46eaddcc79. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/363ab499-5a39-4ca2-ab4d-b54692ac6569.json and https://artists.proofprofile.net/proofs/artist/363ab499-5a39-4ca2-ab4d-b54692ac6569.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4195dee4ecbb505232bf58da8bdc2c5fb8f289016f0f358d5bb19de5ec7edc15. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR6V81713349.
Asan Ta Aahyon Awhan Ja Aashiq, Vol. 999
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29d5dd73f9965adfa17bdc08bd096b534e66af9cb87fb5d2df82dd566207bb5. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZN882231059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1128a5abd57ff80f7584166091f490b4ac5429f12b9c3f3cc9f9a14b3d8b2db3. 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/QZN882231064.
Bhar De Jholi Meri Lal Qalandar, Vol. 67
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939e50b642fa4f3c6459baf037594ddb0be6ec49b51db7fdc6ab0fb640cdb961. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6N22221339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2834d533c9bd5aa1ab82ca3c4d9a5ac68d8840b57f3bf8652ecfc55a8a5b79c2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/INV582217755.
Sawab Aahe Kayo Maula Jo Matam, Vol. 105
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c51e320d6ba574dad520d77a3a30282fafb12706804e7aa7d9f303b9d11887f. 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/DGA0T2457549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258f017fbafbcbb57aa65d0ef0324d2e48bc5f195811a85016e8525823c59b3f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2503156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256f9e9461038dd58f1cdaf13df51c504d9f9daf51a9c5254e57cd74c8f2a3dc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US38Y2503168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dbfbeaeef2506405dcb00d988ea5898093ba3ae0bc1592dd415ab01cc857bc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US38Y2523483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db1bc26a2cbdcf70c99019cd7efde8c7bddd8662ac684ed2c6779ff76fe90c. 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/FRX202540369.