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 0x798ac6895a546d31a8c6a00dcbcc84f9b05fb5422da156583905b1ffb2eaaaf3. 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/52c27522-bf2d-4571-b13c-898da123478d.json and https://artists.proofprofile.net/proofs/artist/52c27522-bf2d-4571-b13c-898da123478d.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 0xc86a3a01520d06ec33c68513227322bcf748d9cc2847726e5a70f07b2683763f. 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/DEFG22331709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bab7825ea5bdbddf6e19c8c4489bd20c4bf63818acde1cbb169aa29fb21fa6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEFG22056605.
3 Chinese Pieces: No. 3, Rush Hour in Hong Kong
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbcca07fe0a8c9badbc8fb99dcfc3b7c484e320998d9f019e8394d5f9c5e31f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEFG22056608.
Silver Clouds Chasing the Moon (Arr. W. Jianzhong)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475161bb933aff2236d5760006b499431bcc6498f18dd797514b0c0743ed1f6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEFG22056617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2610324d3af5f433a0d0e1f3a370776967e7197b339448ae3892c439612bd35c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEYX82141676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8c361e7377c351d4c084feba01329c534ba8d8d64a43f251ef5d20f25b7b90. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEYX82139940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86994f54f397498f54d3cee5c637ee93d4020041871884b2862d0a4cb02030f. 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/DEYX82126043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38549e3111a384f32c6db5a9e7ecd31a6abfc0ff835a822e77738bf9f7d9743e. 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/DEZC62271895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cff3a0bff83cb660d6fd7be50f654c4dae17c0f8885d2fe9cb4cb942af7fb3. 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/DEZC62266779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4274a59eb356fa2c9058024227ae8c39a2cf4a4f06fcaff1359b37717ff7a408. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEZC62249332.
French Movie Waltz (From Dancing On The Keys, Book 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a4e74cf03db209b1ce942f62a98b54b075af9e35c841007e259d0fcf6b5a8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62142145.
Kinderszenen, Op. 15: Nr. 10 Fast zu ernst
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04800454658476f2f4e2a6fb6b413ea0fef852af420e509340008d78253fc355. 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/DEZC62136633.
Kinderszenen, Op. 15: Nr. 1 Von fremden Ländern und Menschen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67efa892a47a124a96ed205f31260257e98947844e8f3cbaad0dec74738078fe. 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/DEZC62121710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc14ec3a77cc3d96835945ce22d574e83aa245761d43a88909c86fecc096363. 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/DELJ82015361.
Drei Haselnüsse für Aschenbrödel (Main Theme from the Movie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de88bda508b92a31d70655ca2f9763066ca7664050efa1431bff1e3fc749e0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DELJ81818613.