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 0x2bf54333ccb15e28a8141ce89622099fb57098fe2be4996ca864eff5c3f4ca4e. 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/aaa9caaf-87c2-4fa8-af97-c37f8f3064de.json and https://artists.proofprofile.net/proofs/artist/aaa9caaf-87c2-4fa8-af97-c37f8f3064de.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 0xa03308adbdc7da5532c3d4fc3e8f407384d8a456a5bc5d338bba5ad71afae732. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:23Z), 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/CH6542404959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62e314fea7df2d10dfa7c4e8a3c2503ac6dee268223068fe71a9fc13981507b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:36:03Z), 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/CH6542408498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cdeb039d11701a8d955d1f0e9f24b8c8ee342cecb4bf9a107d98ca54dcf5c4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542408936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad92701ec900ce0d67d76722c1273de71954d225a313384abe3392d97fe8036c. 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/CH6542408933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8917f3acd967be3b47950a01867715f5356d95e3781f9e87d77b1823982fdc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6542408930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2776446f788b25509fba822b8e93a662f4113ad37853e5543f57fb974e03cc43. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6542408931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa63c507681eb8cd7681c20b12e451566ddcde6c1f4482f0fa1951769d0b3aea. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CH6542408938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518eaa0104523ebe6f01be5e890985d0ac1b1a20ca680a0aa676de992b908ee3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH6542408934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57edfb0ba211d25ca25d36828eeb06bfa531a910db7319c2ddb97c1307ca35a5. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/CH6542408929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6707e5bcfd5bae91e0f6650462ad38ea6dc69bb58823882d8536b74c96d3371. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CH6542408932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f8e35a0d7da0c5c2e7e14efd3c241c1b21ea01527f1e1ef49579ab26caa97. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:43Z), 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/CH6542408937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62e314fea7df2d10dfa7c4e8a3c2503ac6dee268223068fe71a9fc13981507b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CH6542408498.