thumb|Chris Hinze (1982) Christiaan Herbert "Chris" Hinze (born June 30, 1938, Hilversum, Netherlands) is a Dutch jazz and New age flautist. Life and work Hinze initially performed publicly as a pi
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 0x6f87ee488698326a0cbf8b178f3026fe840ade9fdaacb477e1e4828c34f0fe66. 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/0a9ce282-9586-49ea-8633-fc027ac58f32.json and https://artists.proofprofile.net/proofs/artist/0a9ce282-9586-49ea-8633-fc027ac58f32.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 0x443399a1d9b42be4037246f22d6e6b81f1d6b70f379c1b4c879574097cc1816f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBG5X1221256.
The Art of Baroque, Jazz, Dance & World Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d27e52bb46fddf3b9b658dcef57e327cfb3720800e146c7d770f1a4bd571e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLA290600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1922b3cedec8bfbb87ede896d6f56045a5632e9837b724475c3b42ba35666. 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/NLA290600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec83d37a87a4908add695eb5c3327d0467cbcfbea117b1f3590727d08ebfe752. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLA290600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fb7d7675147365d76ddb5db3e7b50aa90d7e1ffeb416988bdfdbf70aa50afc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:04:13Z), 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/QM6P41439312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f94179867c564e3f52cdd04225037b768d7564dff92f123f45f5bbfc3895434. 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/QM6P41439313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5054913ba29c0d4ec1ba5f7260267c103061505a7ab2af73c9ae08904d6e9c1c. 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/QM6P41439323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5e650575091f1327e019159392bea1e07f9d17c57024ca5a88f77c2e70b52. 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/NLA299700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf39c576e9cd94c4b873b0a553a20c5a5e0552e6985de1b3c5737dc5db70002. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:38:36Z), 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/NLA299700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc690c8fa5b54de940113223196df39571a0481edf20dbc6e7742d70baee6a183. 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/NLA299700036.
Adempauze geeft Energie en Ontspanning Rust en Kracht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5265730d171b53440e10d5f8eedd26f5b65f6c09f1262e39abb676e1eb9962e. 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/NLA299400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146dc3562f265ab562c7de594408adf15b9844f065c9ae54c471cc6c196fcc33. 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/NLA299400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb423cef98503578ad4c65de23d6147050a79de603b7071dddc29b3dff1928662. 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/NLA299400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264c6a4bc276838b8c5f4ed45237181e6f530acdb2907aadaacc2fa7052d9154. 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/NLA299400009.