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 0x4f0be60e8282a9b4bc771dab67aa4bfe8db636fefa912a4367a6754e5f216418. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/176bf9ff-cf5c-4af9-8c60-f86dd80100d7.json and https://artists.proofprofile.net/proofs/artist/176bf9ff-cf5c-4af9-8c60-f86dd80100d7.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 0x29498ba9ff098e6d1d6cc5c973ec94fadd9dcd28df1bec1f7bde3e59d2ef2db3. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QMAAK1614401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda69b5d4dcf589da44507b21136b4025b87e3a215b32bf3526cc4df1e7ec1394. 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/QMDJH1850774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a380f1e7a74eac2c007abfc93c70ca36436e0d6735ac9ed8635c88db609366. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMDJH1850779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd66be330162f05054cc10dc739890467a2773caeaf5d462d2fbbd2ef9e93ae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41931342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8614b1d1e74da51a4b12350d0ad7e74885d6a1cace670089353f8e4b11e1e111. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM82299485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee963f5597a114259bb4effdb2c5c5d58e4060eec76b9bad6195d66491b58a2c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMDJH2351078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc906f2e4622fb671e2ccddb2643ca9d388e488fdb12606520e53e39c1beb9f1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QMDJH2550483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e160785b895b3bc80a3b161c3ce3432d92f9c197178b7d2fc165fd9903839. 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/QMDJH2550481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc906f2e4622fb671e2ccddb2643ca9d388e488fdb12606520e53e39c1beb9f1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMDJH2550483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3e8a47bd1491c3de4d14a83bbe076c6d1260902c2ae2cf7ba8ae38206c9ff6. 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/QMDJH2550484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b8287427b1d5e9838aa30f51c94170ef7539a582431276f107a67cc6caba88. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDJH2550485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d4377abc7d6188f54d22affc5b2d34e7bcae775024a87acbddb50f7f47e689. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMDJH2550486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc289496b931da6e13fd0f8bfc98cd4f02843a1181e93e4205f622583cb10fa33. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMDJH2550487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1316d77be826ce98b5836d1f498158a796feded09859d949fd8a96f8c35ffee. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMDJH2550488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4712fda9b94313276c0af95a2a45021513da90dadbf83373c9b518ceb21711d. 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/QMDJH2550489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe755413185437709a0047625c44e2222c742c44c8d3821ed2dd52c97b58c7ee3. 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/QMDJH2550490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87e44dbac183d88767e90aee20457da9f2eeb727e4070e87089b7232983fcf8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDJH2550491.