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 0xc2241080419ae3ebe5a003adb7c1edb2e6ec4288fa03b39b469f3e06506a22be. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c12f91d7-1cc3-438d-b2a2-6c6cd54400d7.json and https://artists.proofprofile.net/proofs/artist/c12f91d7-1cc3-438d-b2a2-6c6cd54400d7.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 0x219d4cb1c385af9811592768aaed3fec2bcb3ce9df9fc49e682b0da3bd6316d9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMA22598964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ca3e53df371c8adeb6df0631893ec7ff39159d7eb06b2c109afb1de725512c. 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/GBMA22598965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f9b200353a25bc6f22fdad698c15525a3bd87aac21a307be0cb9e4acd15d9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBMA22598966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eed9dc38123bf45241cbd3153913c4527015db465de0854acc12145d29105b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:22Z), 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/GBMA22598967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e83c7c215905ab219afcd1a30ff1c0a8ca85f59a9ddf53911c82fb98f332e6. 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/GBMA22598968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542246011708c4ccef43dfa2180a35c6e785f98b5746035f3d3f50d772d13aa6. 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/GBMA22598969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51515e08ada2a62cdf0e3935defbaa1a64f68904302c7243141eceeacbed4139. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:08Z), 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/GBMA22598970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801fbea3ab845c8aad7971a8ab4c01ecb130c8b93cdda79de2a1a4b77c032ac. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMA22598971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a5748acc6d492fac483e24059ebc48d1c623aa51bf2a0a6e57ad65181516bb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBMA22598972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3f8f5eba5f8118295c93c5aa2314411419346f1dc4a453cdb4a8c1ecbf3085. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:22Z), 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/GBMA22598973.