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 0x419274b4561384dd403c47d287aecfa1e02b1997e6701997d778ef672b9b357d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44b11f4e-24ca-47c4-98b8-1d0daece719d.json and https://artists.proofprofile.net/proofs/artist/44b11f4e-24ca-47c4-98b8-1d0daece719d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x183eaacf78ee3da45c0b7276c105c8ea743f7459be8eeb39fb85743f71abe7b7. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USLGD0710067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb9c4a44e220f7afba6b93c78ee872e212a61ad94353f39180b5319f9dccb6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USLGD0710068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526bb1f51ebb6e14946f06a11a5cd7959299c43017e25a8fa917df7e138caad1. 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/USLGD0710071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58669c80569abcc8e8493381f84e62b5d2d2258bcd2cf1346876a19611ffc48a. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/USLGD0710074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd026c2c3c4173dabc7df72c3efa755296c3ce592f12cfa06813d94d3f3b66550. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:18:16Z), 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/US78T0727141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dd8b876390100ab1097ff31e7d4657c7d4a1a1f7b75f6ea430165b9ba3b03a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:35Z), 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/QMYW20701187.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68537e713f68baa02b7507bc86eb7b49a4e9fa076d500a877f672dc037a376b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLGD0810092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88db86afed679aad36f527b1054e6f48c7d724f0ad67c7b1665bb0bb824db56. 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/USLGD0910134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d02ad8f230ff4afa866e0abd3d14508f6794c9f4d5a35792c9f981fe052eec9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL9B92344145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1913ed002c9546e5beaba1afc42c7fb85f9ca24a258cb5472b64452fd34553b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PL9B92344147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e17cd62c0906b4ab769bf66a946e8b7c1aee34d5a37a8e276d1f9887a308e3b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL9B92344149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0d821016c07ff441f732591d14e0a1bee446753a28ff64ea5c60185132ace7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAQTR2302057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e90cca1b4ad2fa0beefec50256174760f137b9aef307d0c93d81f7b340dd74. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PL9B92344144.
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 0xb38572453ea93268584e29bbd34ae3b9dbcd69acd93ff908a925e48f30c57eed. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PL9B92344152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ab11636ad053598eae7e5184bc5eb24588fdb5a11d89932f5729995f41527. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PL9B92344153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff14df418b6809f052a76101a14a47be2373d3dc7a421590e285a4b8d5d4b2f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CAQTR2302055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e093d180fa19f197bb283e7b1fd525229da2b3efbce48d10768392d7f28f915. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CAQTR2302058.