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 0xc0f184e5e5bc28ae512158e4f138df2a021fdc4684c978c74def348246d32f96. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa6f4e68-06f6-4bd4-9ece-adbbd30da19b.json and https://artists.proofprofile.net/proofs/artist/fa6f4e68-06f6-4bd4-9ece-adbbd30da19b.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 0xaea443356642ce574b3ba603340892af0d35ba94758a278e47ec35fe57007c38. 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/FR9W12251715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac3df5aedd66f4a06f923c9b2a77d84a747895d2d5073eb5c41271800f2c02. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FR9W12251714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099cb2037a06dcf002f98224f02a7004f9158ff012de4a531c88560616c7a44b. 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/QZMHM2264253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f2dfb237fbf80ab743d6eb008b9e787da303da35795ab987d1dfefbea4ed0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/US38Y2417389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b5b14d304b039dabc71e8830346024f07ce55f73abe667c22ad119ed885ba. 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/US38Y2417390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227739711949732bc19491d8006b0e1a30df212dd01ab00e9af15496f0b0d10a. 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/US38Y2417392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2179e528f4b27b06dd46b4cefb0af1073721d4c2accab18282e8e9fbf1df716d. 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/US38Y2417393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca86897a8c472bb0a67360ba252d93b5e1a829084560e6c59366d4be31c217a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US38Y2417396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd940eff6b0913c050b8223995158ae10db1070a0ac28ccdfd990f77e5ebe6c61. 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/US38Y2417397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42385fa684e4c1fef9da5a2b1f2aa666493a628cf05c50284e9233b59332627c. 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/US38Y2417412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9bb9acbc0c920a5718496cc92580007741f7dbe019c49c83c01177ac866ae3. 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/US38Y2417413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5a4559d2c6e1fd7b0be924e20467d3c9f92c9125806b5e89c25d312e0ae6ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US38Y2417418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf6c246d16b9bf4866c69410a845c8cda71829846d22003088ac5087a681da3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US38Y2417423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef9fefbce47551e2eb59d34b40a491eab3ea25ce491b3a53b4b487bbfd6679. 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/US38Y2417426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc15bb166641b048272b6788157bf44512a50e2276150be508565d43396073. 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/US38Y2417449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8208cb5e3d5e7d2ccc0b46f61cd50119199b79ec27098b2bb0ea037411c73207. 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/US38Y2417451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea3b003df180f9b6a169943cbe8877063d2d49379d754b79e867fb235a7b4df. 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/US38Y2417453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd247a50c3958f5c106c9426b6651b87eb605dcfa03e7a36a63bde845290f85b. 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/FR9W12151213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d4b14d6babf6a074b93087f5162b87e7e1fd4c51e2e894e883237fbd97f64. 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/FR9W12151362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5379e8c0e698f5308a96688a1fc81fbcb7eec4f8df89e57f085b15c510ddc14f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR9W12151363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fff773795e29097d29c2a855ab63ee16c43d46b29bee357d21553be340cd44. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12151356.
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 0x87d0ee7af57f49ba33134111a4163aedf633f9af38c244535824b6a844178a06. 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/FR9W12321781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dae428f5e6dc0604ca446492c8ea3e9990aea6ad4587e34290fe1b5e4e35f6d. 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/QZK6L2446086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7847ac4757e783d92720bf533edd1e1211037e3359f2feac6f321ef9c85c9e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6L2446089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9e2d148cef0c7b4eaaff7cd6ea32176753ceb83da6a8e9582b8bd30bbf8d9. 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/QZK6L2446091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b0dbdc86ed646b66db3223c6ae79b39033aeec5f9fde4e2bcb82bd03cade4d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6L2446085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab33ee781d5ff4754114469d0fcbe5d898cb9b3f5e02d25f7c0b6041fc2d5acb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS652129589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952340c0550ac8aa0e9f646de16e639a5faec1a54a22c49f3100295184fd8ec4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBC2455817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467d6f8d21c38cb85817da68a40393c91e62313ed8274af53b8fd5e6713115d2. 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/QZTBC2455818.