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 0x26c845aa39f86220cd6aa741ec18b4bd83c7fe067db2e15c228a8c727741eb14. 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/f6b2f2ef-7f01-4179-b222-11aab33e2cc5.json and https://artists.proofprofile.net/proofs/artist/f6b2f2ef-7f01-4179-b222-11aab33e2cc5.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 0x3769b58b77d2dbd438becdbd26a467d87d124fb367ed92f883760ac25886b72f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM4DW1757359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7df20f75007b0aef5e3822a2c53049d3527833f7f321ae3616420c83032adb4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM4DW1757360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb644a4b1cd038f68f0ebf68e70f7603e05e496382b085c0436d866b62a85fd9d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM4DW1757361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dba7942e5c1165689d7812fd4193068a294e77fbe23b4680db58aacd4825bd. 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/QM4DW1757367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851a6f6b4f243f59b87675ffe99e992525ca9c0b10644551432fd37e126a97f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4DW1757325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1332b052974ebd4babb7e4258ec1afa5bd876378084e122af3139ccb33c5d279. 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/QM4DW1757328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceb92f22f98d1431ab730dc06982353fba14c8138a310a6ec5c0ffea561f0b2. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:34:12Z), 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/QM4DW1757332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d60fc396056d1cb3b82b249ab91a9ee9c1e89d64152837f6f27a2f5677e591. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM4DW1757309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00863ce2cbb498e9dd75e7d3efe3269bdca7c077efcd4ea68b72ffe2eef23fb5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4DW1764774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea40a48f8155d00437d3213e565159d093d53d53b7d580cae319877470213a0c. 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/QM4DW1764775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452492bb81d897c623ef3d9d754fb249fe504d88ae4fd164f78cd13284910ea6. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QM4DW1764776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963421c60f7f642a9c4fdc0545aa6a9ffa1df2f41737792a8de32cf1964d788d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM4DW1764777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5776db8ef0e1746f1cda351e2206f690066bc17b0e78bd9577d6c919a3f160bb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:58:55Z), 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/QZDA41820584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a883f722e0d6db01a9336be2fc75c237e308ae01cf2e449a61d6dfac8a82d03. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN72007590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d25e8595e2c27a4b3c6e77686af56c55d52e9aa0bfdb3d21628f9af3b502539. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:53Z), 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/QZHN72006489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd3ad2fdce6bf9bc6c0b4ebd1ebd619c05ea7a1b5b2dd3b316ec023634fa29. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTAU2152411.