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 0xb97eed8e608d951463f9729fd377676257e9e35785e8ec8d8fe24f92297d4388. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35bb69a5-a8ab-4d05-a319-5e482470b6b0.json and https://artists.proofprofile.net/proofs/artist/35bb69a5-a8ab-4d05-a319-5e482470b6b0.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 0xd14143c5bc56dfcdf70bee84d895148fd596b99ea5f9f421dbd8ddfeeab347db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf22498d79657866b0e0b3449744dd0315049f8cc3bd6d832b11d70e03bb0c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f15352e90deb4cfc19dd561f8f18a7245fefbd52e841232bc3a908dca33aa8. 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/BCM9A2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbafc4b9198115137149f50f9d1f35597cfe598135c9930b98e8ba87cb8fbeff. 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/BCM9A2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18dd2aac8e7d3df10576ec88c5de0ac8702c10ed9581ffd023a7f0213f38f04. 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/BCM9A2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3908384ed39e8bfde7175186d3165f1c0cd8745c33d21cc1659d990e5aa4d87c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b95d63933740225ad7d8f5ed9c2ff2e163127b63ced25ad32ae1c5653620ca. 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/BKM2L2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd850e000b7b410b86af574cdd08f3c015a112386c1873020ebbcfad8a7c4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71338dfa700b2feddbc90622be26366a45c6ae45cc9c28533a5877872a4ad698. 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/BCM9A2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c5a2d32888b2daf2ded89265a6b8b88056d770a5e3839cde36f496ca23bd40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCM9A2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14143c5bc56dfcdf70bee84d895148fd596b99ea5f9f421dbd8ddfeeab347db. 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/BCM9A2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecc130783d42a77499c4688065d3c25e55ac8e7bee91b55e52162f2fffac564. 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/BCM9A2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3600c6e27218a528d668ae3f0f1c59a755f397844bbcb231e63431b992b97f. 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/BCM9A2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BKM2L2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d6b567705e4f15ed2ce85c9c3517629fc1ba1f497e2d8feae484d3d3f42e33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKM2L2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKM2L2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840c95ece332018e9e95e6e46991941eb62ba2f7386159b63880f4e26aa681ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7b34ff0730810a23d9e122963f905df99f3539552a340f94acf656022dfc6b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab294e06d1b3d2258fa6b06efa782ad461f2b22bda0c5c6e9d9326dbca19e2f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2500007.