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 0x8cfd884542605e3bdc57ee0f944ddbeee406f63ae249239cbe6aaf54b1fe4a8c. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a61828d1-9278-4863-9867-6b5ce54c4af6.json and https://artists.proofprofile.net/proofs/artist/a61828d1-9278-4863-9867-6b5ce54c4af6.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 0x12be59649386676b4fa9b604fec0909a8d6f914e519a4687f3bf81f48df9655d. 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/GBWUL1932946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf311bcdeba552d76608def5470fbb4aefb4023e45eb7cc5167f52d5f5522652f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBWUL1940103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493f1814aae60f763df2313b7fd116f9a7236f12682723bc09e6966feb9b1788. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:18Z), 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/GBWUL1940107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56469554054f9af57a67908b5e90fed56e996e95ad7915b390b58923466846. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:19Z), 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/GBWUL1940108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9403cc03627e2d496ef9d7f4dffbcb3bd6cbceff51a68f80854f62bc07fd86e. 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/GBWUL1940109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14f34b4b7f4842ae68bb999d31f3c70cf164b268ace5ca32058101eb9b198c6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBWUL2005669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d957a31a89a9da3e4e95ed8124601ebf319e6f0eaac43ba40bbfe6e2134dc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZ5FN2049639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621d19a8977ab402d7c69bb4da40d0cbb057c6955c9f5ebb13bfd4c29ab2c62b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ5FN2167897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77073b684ea5761c8328e555ed31666a21e003b6f13139a01675dc893c971e12. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:46Z), 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/QZ5FN2176733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878fff48a33a5ff42969c31c971f2928f32fcf4b2eef7c793d4a81a08148c5d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZ5FN2199356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c99f48f495b7618b2d1428b9d960f98d704f7ba92f6b7eebf680ad9fbb8ff. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:15Z), 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/USLZJ2101092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3944ed7ca4bd29299805ba4f9f508b089956a24ed3e095ae5d457d9e8763e86. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:23Z), 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/GBWUL2156784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42737e08ed2c294663ae86cb422815331fe4b9c0a6ee98836f7b9cc24c06c63. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:31:05Z), 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/QZ5FN2335951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3971391f9508fea239cbbc731e94abb56270f839fc00ca549e74136b1fd5fa3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:04:54Z), 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/QZ5FN2335908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb122ee80a8181af0556c4700685231df55d4ce07eb1754894dba1044dd4e7f78. 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/QZWDE2495947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bd92aa43bb7638c519df14c366dcba2a8cd57a20fd6fcc84062b2a0eed033a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDE2494492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f3e96ab05d901dfd7a84da9e5dd5b70a23a2c86d5f01d57c8eb6ceba0c6ad1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZWDE2494412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56891fe693727358ce7c0136b67d01b2eb7089a4a08e7e397812ded4d5d6e23. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDE2490595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1c25083ae13ccd1ef259cb8b817ea798c0e31eb2f705a539f3538d3619662. 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/QZWV32432841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8cb85bde2b0b972814b4f13014a4fc064bbf107dc8d4519e872fcc68a3088. 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/QZWV32516811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd90cbb8af2683bdc53dc0ac87d1030aec13a573bfaa0a902934efa9fd92ad8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZYFZ2503542.