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 0xa804645a2aa8510e11ed44975d45c8052cae493d13cf131903db99f6f609dd0a. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/074660e4-c24e-42b0-b4ff-71c9d614777f.json and https://artists.proofprofile.net/proofs/artist/074660e4-c24e-42b0-b4ff-71c9d614777f.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 0xbb89c2fc5343f1e7f405393ca5b3f8f2e343967c1e5a6530bbfdaab76270f352. 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/TCAIS2424969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85025abb55c72a103ea3cd61ad5ff33883659ee47f2061ea61429f15d5e98e54. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAIZ2490651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b522525259b7f9ea8f861b2b2be99f72b29125df9037896b7d3fb221dab121. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:12Z), 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/TCAJE2564011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0429b4f7fa6f446c8b86e8d31f69859edf5197ea6048cb61d2544c5d3027425. 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/TCAJN2558749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d90ccec31dcfbaf53be97c6b422f705895ab08c66d791603d0d3a04c5221d0b. 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/QZS652564188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f9917e9c65dd3ec574cfb274337f2d1f8d062187d054bc589767f45ab77456. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:33Z), 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/TCAJQ2520976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf009f800e4bce499ab8e08436b2283eeda3b5f9074867da234fa170d270f37c6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:46:40Z), 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/TCAJZ2585174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82498738d5285828405299c9b32346fc4f433e5ee61fd2cdca927016ec08abec. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJZ2585183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613f023253cff11867156939621dc2b7eb3a9cfdb2689911f7d207a807a7768e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65X2519998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27932d534296d997453cb29c223f63d6e3671b9242eb56fd13325e16d5e1f82. 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/QT65X2526941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db98456743829ecc98afc32663232290d064e8f2cd0426e7262fa91122c95b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT65X2526947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d82136f539275cf3895b5d9aa06a4e3a23ec6e87b949b1e1b447698b743e8e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65X2526993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0290ca969427d7c2ac3a4624fab4a6651cdb5a3b5bf026a171f654aff353e6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT65X2527001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fc25bf18d1705a064b84d66b62df54fd8fd64e031404279b1eebce8f9eae4f. 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/QT65X2527031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98695ab755e18af2f74d0f36987034cd8b5ac0595c714bf254933b96916b47cf. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QT65X2526928.