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 0x436a90f95ba00b91e00732abd6815b1404ba1f06b8449000234d9e5ba91ce30e. 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/cad38dbf-7e1e-4651-aab1-e3c926ebaa9b.json and https://artists.proofprofile.net/proofs/artist/cad38dbf-7e1e-4651-aab1-e3c926ebaa9b.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 0xa91019aee13111c524c90efea416762e50800a731fb6796c1268bdd8d4617404. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBKPL1831609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a07858756c4972ed8b42afb9344b528cb1269f5aafe70479f76775e59c17a0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBARL1901375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02145e8b158a7cc5954cfe67ea4494f2b6c3ea775c9e607d26c1b461ab2131a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMBZ92050509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e954b28940c17912c52846ade5bc1b01b2a5fe4359c45240d56a668e8367c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TX2111470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da373b7ba8dafd40cde7577e48ef8606066ad73f32dd2800ccdec180cfda755. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6MZ2160490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a204540e9b27bd24c478cf7c3a719b121cff3f2dc929f2fe76a45b0d10eddc4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMBZ92101873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe20d311e4ffbca95ca188e79d39b901886944e7bcc8c0fb54321c146db46d4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMFME2197170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa877449be6b357551224e3b00a8fb244799a100192a9ef68bf7c259c73f847ff. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QMDA62110235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9de769597fb01a8a08a3db56269c1be012d0c9465914cd2fe1bd98a93ebed0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62103082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da373b7ba8dafd40cde7577e48ef8606066ad73f32dd2800ccdec180cfda755. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM6MZ2160490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e954b28940c17912c52846ade5bc1b01b2a5fe4359c45240d56a668e8367c9. 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/QM4TX2111470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02145e8b158a7cc5954cfe67ea4494f2b6c3ea775c9e607d26c1b461ab2131a8. 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/QMBZ92050509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a204540e9b27bd24c478cf7c3a719b121cff3f2dc929f2fe76a45b0d10eddc4. 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/QMBZ92101873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5736765a1a8dfe079c9d99814dccb325d80e35a76b33bc7c392a2fd7e9d141. 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/QMDA62110459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b45959238e7bbf9eca2b298863ca49f2dbbfcddfd0b68603ef2e73c2b40eb. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QM6N22018979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0700606df80fdfe313f46249269ba2c97da0cd6a0daf0fc5027ea77d2fcaeaf3. 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/QMDA62110471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b2f5b2500b13cf61c747e5eec27374900362c71429f03f34a1ece6d67fe0f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMDA62113099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ef8e40e8934ce39fe52f5d3e170914edabad19410959830bbbfdab2f660ccf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6P42220748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1814de85a12ba5df4d5e0d2dcbd34c8dd401f3ae568a3efa0b4335bb89113. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QMFMF2222570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ef8e40e8934ce39fe52f5d3e170914edabad19410959830bbbfdab2f660ccf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6P42220748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba1ac6245b675c8678e81ad31a59acb427598d75db2e136c520bb9c72b5d7d. 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/SGB502357668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd483c88ab3691dd72c0ae11471e4726c178dd101fc3994db1551d430e64c546. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SGB502389860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5921b37605eddf12ad221b81c1004fade8b1a0fa0320d4a604ae0baae689bc3c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AEA3A2105059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc20e6aca78ceeff24ef587af362fd13c8eba459330fcb36fafef43f1f7f1513. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME2328698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece1b30c63dcd10b9c8e0489192ecc296dc4e6a37b6771d33d7a14cfbb4a725. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P2145920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e97ba6a2549af89de70c9fa69bc2153cc98df6229d3ef515874a4feea4fc4f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2145919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01757e1319e998a233539384d7bd12c81df03430241913f160f863dfb196c5bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFK2143850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91206cc280e408c40f0b0dcc4f57c6ffcff8efbf81294cc9751ebcd77c116c8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/UKXN22296320.