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 0x325015e2eec65243db11ca29f95b9685639252f392f4c29a54fa3fd408525e70. 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/c9f99df3-e498-41eb-ad64-f40e095217f4.json and https://artists.proofprofile.net/proofs/artist/c9f99df3-e498-41eb-ad64-f40e095217f4.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 0x839c0538c4fbb704323e998601bfba9861f9e5f384ffddf70c0c01936594c0e5. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/CH7812065242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a0544beb5f3a8b616ed9227778933d7210990473fafecaf91cec748ad0e34. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CH7812107571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb59d4bffad24325d03fd9a1520f069b532fe326ef8985068e5c22792e9a935c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7812228275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697544f8ecf29e3a61581ec3926aaa4a67f8b787367a0b798d4b24df0611a8bf. 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/CH7812346272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d9abe344ccd1cf50d5ef29b447e7fc254d8ecf0438fda63b24f1a04d3d1f2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CH7812350892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be0aa2c54855f801ec0c51152da09916897a7a88ffb0c20d5b253dedbfd4ba. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/CH7812357957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830f73c0c5e7ffa2076f286c0fab72bd410a67a0ef92be167c983c201d38f022. 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/USZXT2352087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078641e8d1f686c710c103f84e830ac23365123be1922fad4efc70fe140f173f. 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/CH7812400923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de90ba1812993ac27b4829be6e13363f0718d8d14002e3f068d2363a1d80a1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/CH7812402831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cfddb40272c0070348dc61994796038d2674663f2e4510650a11f4c9466345. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH7812402833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287cdff3e1c1adf5fa329e59cf579621a79f2dcb213908c31918e4d697b51636. 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/CH7812217393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7040e2badabcbcabb1e6bd81a3fcee673f3886822781b594f48a23661103e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022111281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba7d404c566587e8ea5a38ffdc32979a1045f8353587af613b07da9465870a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEXK52100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200f60d8e84bc8d0f63cdea6f04161324901fbe22f6bac27abc4eebbdf8141e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEXK52500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d378bd569b95b2a241bba5b51834994186012630af22eebc3ea28c1ca0bae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEXK52500537.
Rom Pom Pom (feat. Rina, Josethirty5 & Chanelle)
RLR2 - Runde 3 - Tag 5: Wenn Welten kollidieren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5271090571309f83739b12578617e290e3a85c6b624edfe5800a5a603bd3a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22401938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ab43d1366d2dc5e42671de3d1d4da488b24893ac5b60f6fc23e75c971754c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEKF22500010.
2G HASCH (feat. Rina, VS Mosquito, Infinit & Josethirty5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d6ccf23c6ad9c2b62d2739f9ebbe40ffc75b495cec1c7b1cc93badca8b4902. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401791.
DUMM (feat. ALECO, KOZIKOZA, Josethirty5, Cave 110 & Jadi435)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81d8e0c54f94ddf474f3014173b378b0b610fe87d42a62cbff9537332eae2a7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEKF22401678.