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 0xac2015a7c1afe268e9736cc1ef494dd7246ceff3433208443a41acec04606fa7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a462b0b-9b54-4869-9e12-b9aa095ebf3b.json and https://artists.proofprofile.net/proofs/artist/9a462b0b-9b54-4869-9e12-b9aa095ebf3b.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 0x6ae62336fb33dab39b0a984922d6dc11c43d3578565e3426f9566e60d1f62087. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:41Z), 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/USDXS1804835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf86a65a8b256bd5cf30ef8d8101c39a73b835ac2d4e14138f0a1c9cf82a16d8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM91946573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa372fa2e2d27afdb4ff0d80eb4f4f1dfe4d32fa3cd29349b733ae785b1a57. 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/USHM91946574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9c29493f7eba629e47b457727346249f50662a7cb045aadfcbe8ce19fdb8c4. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USHM91946576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb3629672b136df6d098b5a983be3071c786db5bbccc70c8bc980b101b741bf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:51Z), 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/USHM91946582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e3142e6a0d947316bb4f20b047072eb618e9b8f9324ef4a68db27d6ae27239. 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/USHM91946583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805cc50f4b701db216c00abdf93d56ea9795967559c66c9f58f5aecc7ecc0b50. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USCGH2162723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efa9b73ac6e129141b009ab9a540cac5f0ed1f46f071275f51e07f4f2147e66. 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/USCGH2162725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0488dbb429457b921c9c99062c3ef8c0c28b7a049e3439a986ec214ee789b11. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:36Z), 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/USCGH2162726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c307655d0ab92809a920ebbe672c173290eba24990e769e19eed4a1ec1581a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGH2162727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96d43b80ab037fea0c0b841809a49916d824329b7267b6f0343269375f2ec94. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:38Z), 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/USHM82384716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4728fad9183cf382be22a8a9341c7e75c5185e6d7b26231d54c7bc333aa6f28e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM82384720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b29261cf53840127510b9b52cb605560ae09abe678f3a86b3aa7c1434a5998. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM82384722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84086af7ae33f39d402eca549b3a30fc12a4a83e26da1484addf63117b9859dc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82384728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e29166d3857cc7df497f57c98d19a4571a41f24c993e3ab9ec8fa6f1442457. 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/QZHNB2273694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8cd1de8e08e742e641d05d7d63bbc278ddf13872c2d78cb7f9e7357beba44. 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/QZHNB2273698.