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 0x5335d7f2e9d3cec211fb4423d13455d10a6148f9f0809f7ed2911394f507704a. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ecc2835-5cdc-47b9-88d0-57a1eda55025.json and https://artists.proofprofile.net/proofs/artist/0ecc2835-5cdc-47b9-88d0-57a1eda55025.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 0x7d46e7b46d7885a185572bd0569a5aea42a96237874f373816565d36c2ecc974. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR96X2067055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c02ce375407d1518b798638d151c3e758059636f4072f0984e076d0edb644. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DGA072119666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc360b2c6a7155ceb6ba9f3e0a27e788f766f2f279e73c10f5b4d83078d2491e. 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/FRX452124149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee73dafd737e445874801c6a56b8e0dadbc50e881f2c968c2a40afaa7165898. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR2X42211819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68228da43c98e66276090e475d63cc8a0e4178bada7cd599275179c20ae3d943. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX202251045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e04664cb66b92706813adb8c89f10ef1d00d655ee30527ce09d1c7ba98e6a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX282227067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5411677899ff6a7aedb7ea2dbb1622454469f07b4696fc1a5b03a52832faba3a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:51:34Z), 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/FRX872217875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aa6d4d53e87484be7c1d0827e679307eeff85d6dd3b4ca6f578b8d6e15e3bb. 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/DGA072348102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3d3831f64e136623d7518fc50cb805ba163397018a829e5cde1ea22a60a723. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR96X2491610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bce38caebfcee0e176375d4c585de355dfa8277c91fcbfdb1bd5c1ea8471c5b. 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/ITR632402750.