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 0x126b4ea2e9919293c296df1e3e18b835da51fb028ac14694c294004667f444be. 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/9d6da6d0-5046-4814-9638-5f9a0c50560f.json and https://artists.proofprofile.net/proofs/artist/9d6da6d0-5046-4814-9638-5f9a0c50560f.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 0x8f570e040f771c8ae1b6d926f645891f3e767658875dbcd32e81ca45d72c4557. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ZAA160100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3088e2bebf20a7a5a630415c21319f0eab209bd64d67ab90b280944170a1f50. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:31Z), 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/ZAA160100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b581ce7f18f0861dae73ba3f9a13a2a92dc29a4da33202768487b8ba6fb9bb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ZAA160100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77336c5e0432a2a3c79e56ef76dbfb48f563b893fcdacbf674341065213247e2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ZAA160100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dd19ce7862f23e9f89b1e9d2109d1183353789c03878555602c067f34e54f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAA160100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb03cb30f56a159f172b6459e5eb0da954539890ece323e1df9493fbfa453719. 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/ZAA160100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d029833c3adc9ce54b647fd8ae0dac1d268c6c2c4c18d5acdc38fe5e8ed3d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:04Z), 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/ZAA160100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381dac009b805084f6aa79456fe3b0284ffaf9e99dcb23be24b932f5d2b6ca6c. 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/ZAA160200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbb76567effbf5adff84d9a0042f7cdc1a277bd46b2fdfef75d1cf04acdaf98. 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/ZAA160200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb071845f77868dcc055ab000a58555745920434ff9ca8c74f6f7b195dff60. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAA160300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803dc724fca5e322023932c1eb4aea6a9eb41e03117dd5b161e8d4c79780682. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ZAA160300549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941eeb586d595db54b5a1f558e35f96be49dc235c40ae47d8dade0ec697f2e72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZAA160400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96920d0f01f3687419b8d68487781d7f06e9f6f8762974a732d46d5fe91fc70a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAA160701174.