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 0x0a7e2e9a30ae90b4dac33f13d3c8f204a2b3bbe95c98758086abfc1d217cb058. 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/acb47559-e095-4b29-8697-dd95e44154e9.json and https://artists.proofprofile.net/proofs/artist/acb47559-e095-4b29-8697-dd95e44154e9.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 0x58f4dc01da451627a87919286bf8e5356fdcf5edf7b43a3a039cce3e06ff8010. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ2447400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71734866ce217144d39699f5780aa9d68c37f34218f43175e5e9b0fdcb396bda. 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/UKXN22496254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2856812c01d59f290323d8f31afd77fb943bee0a47a0f2127aa5048a5ccd901. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKXN22441938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aaff0eec25fa487e112c7e9af05f7207d0380d363bda343e94618db1e4a14e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKXN22441940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba816bb0b78c612c0677c3a44ccb15e8963bbe4f46f04063d28214399817493. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKXN22441937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089c71779772dd987f9cc906cba7883a485872d4bac306730c36a62f7867c219. 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/UKXN22441939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7b56ce1ac754a506579df61159f6fdeecbd268cb1502e52f903092f8c84a72. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2439486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c231c18b8405617e7d56680edf9807443f22e152db9a109561cbda9594025. 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/QZW9M2304529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983a3b52b99b7d7fd64c7bc83beb02e53d6a1640e707974e5521c05fef06645. 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/UKXN22396027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd724bee402341a0f28f81728730ffd25b3cac1a9afe572b7848c67312ee7931. 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/UKXN22357598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f04de72d3a65addea2cedf6bae34561b638891610c479c56b7c95d5ba6b482. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKXN22317442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405408f1bbb0e978e53c26a95422b60e3aeddac7bbc2b84ea35ef061e3d8f74b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92319505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25fd309665789ddc08eb0ede1b8330e46e6f1a2da1a1fd3c6a6cea32ddb39c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHZ42273304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf86ef6da566439f1608b6b9d50adccb4bf4244e63aad25093df4e6af187355. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHZ42273305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329144adeb243cf78e0148d1d02c921d1c50f249d8b00e50d302027c42a2eeaa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ42273306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfdada69596f0013800ebb898ce5c2e1fb65d4025012b7c1ca435f00c8e09eb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNJV2144182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da86c653e813701463dd01b9a01d37cf59e9dd6842ed5552c4fed7734690cbd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHZ32139273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd69582eebe2040668c820f0b6f76353f00d49f833aca5baef1c51a1375c1c5. 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/QZGLS2176069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6026bb8b9d84173961ab28569a12a075c38048b311e1067c4c621b00429acd2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92517212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee48050467248617f48631abb5a8c77752963ce1483fa82a3d78b03bcd600c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX53U2497688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6303fed3e9511f7958f775971209ca7f49b98eabbeff9162b45d63a6522ecc2. 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/GBMA22493320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec591037fdb6fcbfd615d86c25093068b8703037ff1b9022b063d065d8eaddb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTVM2336107.