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 0x0d01c85f372b63fcee081b4e4e83df1e2f70db8c445d05edee95602af062f20a. 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/bdf13572-77a2-4f74-aa5c-1803f3f7e0f6.json and https://artists.proofprofile.net/proofs/artist/bdf13572-77a2-4f74-aa5c-1803f3f7e0f6.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 0xbdd7f753d5ac0ed1ae36a7686523b7106bcbde4e763fa89f9cb87c73f1cd40c6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9L2478373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb96f25afd7ffd07d8f98d6c9d44da74410d4e1fba01fc86a65b4829a374e3e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9L2483604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d563048ae21721d739ce0a6417ac90c115dc2a340e00c0a0d28a7827d37b71. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9L2483593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff79b81282c9e0b7d310b810441a547cafcc64e0a57653ea19b33b620e126e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZW9L2483529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daab26b6410ac08bfa22d569cf4fdef8e97411a5910bd875a44399f15002bb4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:27Z), 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/QZW9L2483615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f7906d8729028cc0838d4a821bdea50f2a8e21835dc0cce99b513060f1485e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZW9L2482396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce1afe5753f283204a48e123569e8115de7a4e67ae4948fa1f95c40717b703b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZW9L2483744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994086ba79425caae734ad1847da2e88ec202ff604742d4d616c4ec6cbc2faeb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZW9M2400738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5223dff51429bf57e2bdbee776e18269698fd93d838a0b95260339e8b446fb71. 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/QZW9M2400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf9bba7dd26f43b7c43672bd73264ffbab86abc2b96f4c29940602dbc37cde. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:46Z), 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/QZW9L2483761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf299313b2832ea3a3deba4a6a0f15e778fc4976f3c429301c403fad86357525b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZW9M2400869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52850e15b4008bf12cfc4e07cb42caa156f541d378ba0cd4573ecc9b28ac0cc7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZW9L2487202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6a68ecaef24fc0df67482a79f86928475efe0c8e8a8a922631f21b83c68f91. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:54:45Z), 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/QZW9M2400740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75cd178fdd4085ff400f3fccdb6851f6a7da6c481359b27b789a2901791be5. 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/QZW9M2400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdbd254d740b48c1691adeb0ea35c56862e04787628057c69d611462ea07b18. 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/QZW9M2400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d428b708b892648df638e6b0a23640464208dbb0d8897ca7c64c2a9358f6e6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZW9L2492373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b5af7b3a3aa9992642846b741677e83e55d710cd710e36fc5cf27afc7d3289. 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/QZW9M2400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2ca89f6f5e07963c05601093ef3f0157f724565748ab6c0a50d86cea567815. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9M2400743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37357accdf73a6b7c3d906b66e7389eb215bfa6371246174bc3966ace817769e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9M2400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb312a12b321166458c67ff68389bfa38f7a439a8e0d94274e758814a33096e31. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:52:17Z), 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/QZW9L2483608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6990c7baa811ad6e160767ed25bc9d87dedbbe49f6cb381eb5ff1563b8fd47. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:37:04Z), 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/QZW9M2413469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d409417f71498d88fab0d030d71204f28cad83cd570850b390088c831e7575. 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/QZW9M2413968.