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 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 0xdfda871c0b05727c906d13930f0bb5f48c4933fdba6fc18d280f6bdf8b7c9ab5. 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/9c1806ea-f808-41bb-98bc-2fa7179b6fea.json and https://artists.proofprofile.net/proofs/artist/9c1806ea-f808-41bb-98bc-2fa7179b6fea.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 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 0x1c8d8741d6083d47a894de30854101df24162315a9f15ba63ee6226333ccc65b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUA4L1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1550be6c7f7a5972a75ea8c9bfea172fdbe50d93f0e89f7b5a18eae117e99719. 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/HUA4L1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acba5c34d74ca536fe495d120ce62953d5aabf116d9794ded8df57c165e95e0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:40Z), 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/HUA4L1500012.
Sexy Lady, Pt. 3 - Olyan Jó, Hogy Vagy Nekem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe903b6d124f977e7fa8d8d5b53ba796a339994a347a090865af71f2033aec122. 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/HUA4L1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea1dd7dbdbdf5ff045175697c258734de0be909813dc7aa990c5fe2a709e9dd. 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/HUA4L1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1528df8d2e15ea89d17741883c429210c5e64fe4807599cab56c053a6773ba79. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/HUA4L1500021.
Sexy Lady, Pt. 4 - Gyémántból Házat Építek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c2424495d3206ab783d497932484b3552f4f1cb57bb79f37c1e1dbb62b371. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/HUA4L1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad613f9e2807969b71095cdaefa9a578dc6ec08b5da8b4f9b5bce04cce5c857. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HUA612021959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbcf54614728a66dc855faab872f632a8165fef17db7e2ec7e2837cc4e777d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HUA612022084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d9e372d1ea4f69b96aee81e0498c3b44f772bcebba184ef5063fe2ba09151f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HUA612022090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6450f098adb995dbb82f233b6e641102a0fcd1ffc70fa102ebda869d497330. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DGA0Q2370068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb49547d7f7833a2404494ff56482a7080919e127d81aa9efd9ca7c0399d190. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0R2303794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f787df3babb560c76bbef7feffa959b51c1c6d99f02ecbd979906c5ba91e98. 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/DGA062460479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230bf2b2c37e2d37720a5482258046e9d2320151f18ce636e3357d3a225f1671. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA092498969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332cad516207974c813981f6dfe3c14276323d80d6a62c8b136f3b4cc3b0d2c6. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DGA072226639.