Flow Free is a puzzle game developed and published by American studio Big Duck Games for iOS and Android in June 2012. As of 2022, the original game has received more than 100 million downloads, with
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 0xa2a6490cb98475dccd9d080ad90a27bc7120525c7421037e34da6745d8ab741e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20cadecd-4b92-412e-991c-2b55d50c197d.json and https://artists.proofprofile.net/proofs/artist/20cadecd-4b92-412e-991c-2b55d50c197d.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 0x97baa97a32643e8c6ac4577370d34f9c439b92db7bd2f082672bf13d39e18b52. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ22557555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf3b7d9556c22df2b162538d6a5b24182ea3f3e63012cbe33d720f63126b9f. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZFZ22557585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c930bf927952b8ce3a077a2dcc9bb670f45e0e9b5605b8f817e425052628c61. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ22557558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1ff708c7d40710c8e8be7a55a555e8506eb242ef008f121234ea2a195da9d7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA52576670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a254045992eecf8dbf7d7d2ce0acb9a3fb815b12110f6a9b3cf6d570e71422. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA52576683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3933214b08965630ab020d4396b4db00190545934ce860e6a4018586991ea15b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA52574929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa648fabe071a680c20ea4d5b9490375eb7c632d0c551870f6ee29300a61b973c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA52576654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbba148245077abff44a1e8ee5b23a875927149357a6fcf8b37c85723064181. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA52576659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe970015d4138a9cfdf68c027a46589cb3b04c44ddc06ac4e8644e7e3579f3101. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52576647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceedbd176c63548d00fa9897913335fb70c16ff114364306550fe2cf36be819. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA52576743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34202150e5913a56e3442d3533bb5acded9f3e45f3d73b081cdc30c3d3e21f5e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA52576656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57537cca399281664144a55ab10c314a574ce437a5c76c2100d94c23d1e9121. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN32513042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d8229e0b0e33b59779b76387ef636650f70a76dea2ff2bda226e93477ca3b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:42Z), 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/QZZ7K2532127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7e8796abdcce7f741e95b2167c604e9be3ff9f34a7cb98e93f1491cd71e75. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7K2532147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86ecd821f667ea6a1f88f55fcc6006e7ffc1e153152be8d14f3c589fc911944. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:06Z), 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/QZZ7K2532143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c5f92b9835844f64044e41ae95a565b21d88896d42241e658c23ebcf826c11. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ7N2545035.