12 Feet Deep (originally titled The Deep End) is a 2017 American psychological horror-thriller film written and directed by Matt Eskandari. It stars Alexandra Park and Nora-Jane Noone as sisters who f
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 0x8b7b0f9aab1c068485dc65ec44513fb7d268eafa60bc75ce219a0e477eb1cd73. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f005df12-b36f-4684-86a3-0080622fde93.json and https://artists.proofprofile.net/proofs/artist/f005df12-b36f-4684-86a3-0080622fde93.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 0x3ea19b7000598fbca6ac320cae9987ae99a45293d58d9b96b23b3679926aa7cf. 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/TCADF1706055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7010ae06ff503b91ef89ce59c57718239a2418aca7a2edd9b659c1907d08ddac. 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/TCADA1756023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa077d2e09e660db86f0a79f7be35418f07a59816675794de879d8f36e4dcf52f. 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/TCADA1756029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16158a8d980f233284470b8bc4a11dfdc4d707987584d4d42fc3d2b645087705. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCADA1756026.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58292fa5f56a7581012bc1158a76bf9ef9aeb676f83b1948352c2b8520d154b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCADA1756027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc9bd4a9d5b00f636f0a76bda07fc89f8ce2e6d64fc0bd74960024af9d6ec4. 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/TCACR1638662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecbbe56c7cfa9073c88431bb7e222d6adc84e4d4b039818c411686c5a777541. 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/TCACR1638668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a606c358e0e00f8be03dbc34aed6b6690cf23494dd81f7df53b9e6396068975. 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/TCACR1638690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9da69fbdc26bf5ddf8dc77c1c3c5ca276faaf9599d997901c38950395873eb3. 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/TCACR1638693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3534a87d26e2a7c5a070c748b5c56ea9488c6b77027a40d1c643d6e35d81fe. 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/TCACR1638715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fec6a0722ae667b1b7e426525f2089494a0e8fe692eebdb69f5eb0ec2c4286. 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/TCACR1638716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b419e8eb8c33569c12e882c2b7890552768f1da80a8cf446c6f653bd5d4e216. 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/TCACT1646297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144dd6db5ecd701f183fb9eeac7c0c9e6295fd75dd8cfacbd339292c212bebf7. 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/TCACT1646299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abf6730cea279c321424615eaf748f752913da7372a6acc1d7259a5363b0ef2. 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/TCACT1646312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a232b7242d4955d64280581b8cee7c7fbc6251586807139f1fae9f0a8fe6f01. 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/TCACT1646298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b0fe1070a2061df3477a268c5ae4cf87928e2ae2f32bb5792198518a8a67f. 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/TCACT1646295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cdfec218e0a1b5542ab30d820945a3826d8af84410a041f910a26b84d2987a. 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/TCACN1692974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f502ebe03734d6c5cdc7387aa937a1e59830cfe49c0ca0a4b9cd79b05b75f2. 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/TCACT1626768.