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 0x2e64ede66c31207fedaa31b693b7c8ed8b397c3af0cfdbfbbd31551d41ca13c2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0354986f-116d-412d-92ea-c8d03b95f54f.json and https://artists.proofprofile.net/proofs/artist/0354986f-116d-412d-92ea-c8d03b95f54f.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 0xcf91924eb6103dd0e152b070a2278a4912d1c79512dba8c21cc36bde7d4a0ebc. 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/CA5KR2106840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c10ada7e2aa372a04ec7e37b662d8ec989aabbd68a8b6931639d4931019dfa3. 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/CA5KR2158688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64778cd8340f50727b06a103afe2d21df7d71186a19ac9c9d67b7e2c0214f026. 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/USA671100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0960d7f179b8ce459af843e22a80f6ad8add86d17532f791bfd341d9120dc2a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA671900467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e197fc140d6ca3f3a27ade34c681a11d3944808144c0bdfcf89df64cc0ce2eb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USA671800086.
Step Into A Groove - Fizzikx Deep Jazz Dub
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ce5858dbb4e773c04a55637b5ba7c6d11035f8403f9e0c73d7e1c1069a45a. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USA672100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2430ff09d4400e0803681af3d86c74ff91d417771049719f539edf8b116e37be. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA671300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a9aac5de20ad368a52f984872dfd87e9db000aa4d348facf15f8d3b6070805. 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/USA670602287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe76ef975c1c032af755636ea0a4a2da8d5a37f3110733903657489c750145b. 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/USA671800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c5626065f18fe80d258018537e8a9efce066186370a6e7e52572f70e2f27f4. 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/USA670601916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d50e6243d7bb28e19d3dc914a2d945195ad72f8a329fe901ca1e3ebeb67a7b7. 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/USA670400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc20dfc50910174aa8ce94f65b4b1407adaf6ca23bb363ea618098ad3e773ce. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA672000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4191b5a5e6962f0f9af7d4f86b0bc056949c0d90e5c01fbc72cf5c571f667135. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US2252442101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7eefbf0337066883131e3efb2b3aee8a66d3a1ee6e55ad5068c1edc9f3e2dd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US2252442102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1547c240eccd12fe1199e10f67cfb3bb98a8e6c380a3c8c0ee7a019904b65137. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US2252442103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fd067c2ad16e280cd809b5067951a513ac9db41930f746f037e8669d524309. 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/CA5KR2336222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8eaa8d850b7c6486fc73313e3f0583456c34290e447191e4f2559f8b93addf. 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/USA672100480.
Loose Control - Fizzikx Vibe n Soul Vocal Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f8d445a380080315d3613f041cc2acd2a2651c295103dda3898b3387fa2f09. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA672100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53995d5a53fc0565659088a95b56a6d848352d791a9ecd7bb3a26a46251fb351. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA672100420.
Abstract Jazz Journey, Vol. 3: Unreleased Tracks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf538127ec96f520f06f1656f9103b9e29107f3bccec6e16bc409b3076347f04f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA671700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83535341d677296ac9abc872d0ab7487e3ee5a72b9e31b7742d70518a6c418ac. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CA5KR2078132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ae1d656139f7bb670a9929b2dd622fc073135137854cd9b42f88e2cad17692. 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/USA671700519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe4d7c7666ffb8719085c1685ed22ccd27ea5f54a129db79b18c687baec1148. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA671700520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644823f106b80da197860574125a34b1fe3a6ff6ab48546e135362dc2987e40. 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/USA671800152.