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 0x31dbeae0ee367ca1318b86ec66fae7ca1034212dca32ee40572db1f319f97712. 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/c5e56d0f-f7ee-4d12-8fc1-abe2dfb7dd3f.json and https://artists.proofprofile.net/proofs/artist/c5e56d0f-f7ee-4d12-8fc1-abe2dfb7dd3f.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 0xdfe2a73688e4ab55fc878b5aef6bd63ce8e29009353f09bb8a35357eb11185ae. 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/CA5KR1824518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3672de162f4de547b3299e830f76f3b84223bae872b746b839a58ac1545bd00. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ATDY81900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676098fe439379af44652f8f751d8afa50a8ff3caa8a16da3b9c3af3de705a08. 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/DEPQ62000871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2690e4e2744bedc342bc0ce55569254d1434655a866a2c8243719fd4722ede3e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPQ62000872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b634df079ae0eb0cc0a9c1348ee62a78893d124760190b98c64782fc6d6138. 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/DEU672100677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707acc4e86bbca0fdb25f4ff1d13634231a10939f4e20db8c8be8a537d03e9e6. 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/DEU672100679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0b5beda91f8f82bcb9b0a5715d2f8fb9837a05f921ff0522b9ad87f2adefcc. 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/DEU672301077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5428b3e2818adeb12964d5b6b3c3c5861ec0a0419efb0dbf0a513681dda0c992. 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/DEU672401145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd321ff25e0d2c2a2ae9eb7cda7629685fc39fd0b3387d37e949eb517448fe66c. 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/DEU672401144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5428b3e2818adeb12964d5b6b3c3c5861ec0a0419efb0dbf0a513681dda0c992. 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/DEU672401145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd321ff25e0d2c2a2ae9eb7cda7629685fc39fd0b3387d37e949eb517448fe66c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEU672401144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5428b3e2818adeb12964d5b6b3c3c5861ec0a0419efb0dbf0a513681dda0c992. 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/DEU672401145.
43 Katzen tanzen auf'm Tisch - Acidbogen (Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d5a7c92696e47816709953bdb805286a1464990a41a3238f7fd7e652994980. 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/DECY52003243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d604920bf81083e37a15545452d52b409c5aa05f0ac9ef70f305fa97eb203a2. 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/DECY52100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec25b1388b21f7a47e54539ffe55d6af416b9951328b6c89a34f286d7c56aa. 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/DEY471881542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915bfe4343b9aca2ab11cf4db0070c1f30543facb3964f9d121fbea70cc1d69. 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/DEH741921402.