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 0x01e5a2fa6da66c8eed6d55e786225e285a80aedf60ef1c91a5bdac7d27add57f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef0cec75-23f0-44a0-aace-5fe5d0c71c36.json and https://artists.proofprofile.net/proofs/artist/ef0cec75-23f0-44a0-aace-5fe5d0c71c36.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 0x009f79dcf5dfa7b5e01264fb1e54ceda33011212e4c57f664d87d424bde238fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3DF2241613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a58367bd0259529a97e27bf8e28f46e3a3dabe7210878031e0167afa22d97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3DF2136825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d994386394284ec1d19cb0d5d1d2f6c730dd500e648b093a166eb8f34be9618. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812408707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc133722aa7bdd89c37d04eda183d23579fa43eb4999aa841804293b66d5ea7. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:16:15Z), 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/CH7812408709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b15baec31dcc73957539e027582a8500f9f9fc17e95c60226ebbe894e9724. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2451500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae857f8a756f38605f1f708b08cae67e863bba1a906ea3229e7da01347e06b. 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/CH7812408708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833c476ffb3a66bc370f49622d13bd032285cfb3fe4e0ae993386219e04e17cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0M2468675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11d95293f54d61ca319298f212f2e7dfc2c8e7268277cefd55f70185d9c6227. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2426529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d273939a67ac20a8c6e17a6586189f739daaaace18b9b3dd5f56f0281e9f7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2492741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52817736f5727f5515535603baef152fe550f4c316dd1d9d51151876c90dfd8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2477678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421c84a4d8f7d7c784c88a712f5f50a271dd893da9663893841740f54ae16d0. 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/US23A1570857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84505a3043161506ae0e91f6ed01a0f01904aed0772fb5f8c9fb4bd148eb77a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMANG2201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd5cd678ea0ba9c2109cedb0547511366db87193b032e5cefb9096e5e597c3. 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/QM3DF2280700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc709503a30c08eb2994583be30eef34974e27dbc09aa125f3cbc840d62108d8c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2262883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea6eded6af053f34067f3cdd5259a03a0af7eae458d89a7f87f0c806cfda8c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2262884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c305e8bb89f3811c23b29b5748b5834c2edb7334eb5e443566fdb9365e744f. 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/USANG2283343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe2cae4ebd110c199f8fe0cd410be144877ba04342d171ab880a0bcbc8e3502. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLX9G2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd5cd678ea0ba9c2109cedb0547511366db87193b032e5cefb9096e5e597c3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM3DF2280700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df40c4322021caf57bc16f4e545f4145495d8f3b7995d3c4fa24f6a2c640e5. 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/US3DF2214318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abf9c8798031979321d44dad7ee2883f358126f0e9c553c870cfa35c3cf92aa. 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/US3DF2076774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8927a6faee3c5ca2cdbb2fbf928422925b42615128e78d508634ed57600d930. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2128402.