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 0xd440a0225da921af7f56ede96fa08b1dfb1377de216023041baa48f77498cc8f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c561dde5-5aa4-45b1-b2bc-cf3df8d9eb27.json and https://artists.proofprofile.net/proofs/artist/c561dde5-5aa4-45b1-b2bc-cf3df8d9eb27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live from Budapest: Symphony "The Bird in the Dust"
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 0xfb3fde331a7601d9c120b05b348e7cf817ae581830c3cf2449ddb4662140e82e. 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/DEF059902640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5036f5bfc0df5094c951aff6ff553e1c1de38300e02cc13bd35887d3ab8a3fc. 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/DEF059902650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb326ad34b0cc16e3de8130da3d0e7d12b0364817bd75989a9d430c2fb75118d1. 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/DEF059902660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cea750c95b25130da3486d5f572189b5f8b24b6bfce6b965de6ffecc0b33f9. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEF059902670.
Live from Budapest: Hora di Marrakchi "Night in Marrakech"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408c4e6ba163fc3c2eb24c461f7eb2d319562313e309b421f49bcba8f57ca64f. 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/DEF059902680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61bf4593e6eac6b23a9c205351d3f87e6d151b52a1fc9d8ed135dc37f62cb4. 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/DEF059902690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a36bf3bc22c1121e610009fe5ff9e54886f633ed4ca7e13e389cb088818cf4. 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/DEF059902700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe315db7d2a25ab5635e0fde3c96a4fe43bfc21d1983326ad9630dfd99d184408. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEF059902710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe308b48416a762e52afa6c899b99938a27f7416ea3cbc45cb1d21dad09993237. 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/DEF059902720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17543bccfdf845ebbbd02c5dddc215ca2558d7c226984bd38b48b001bb8f787b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEF059902730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4faa396c81161b4ced163f17c1e0d9e72f328aa32814fc1374606b132927455. 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/DEF059902740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1baa0d95c2bd5a16182a942a985f52ff4560a23cdb5f6354dfe1d48da9619a2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEF059902750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789663d2cea4860dd4e04fdf4c3021c013535235679a48df5c15124d3e4e540f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEF059902760.
Scène de Csárdás: On the Waves of the Balaton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5439e7dccf5e6267c0fe0227f8d4b3dad4ac6e31fbe7737e5e45c90db355b. 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/DEF059902770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebddb2c438fd7c7e3665ce604558f006ed3d5c586215d926ee2b3603d21bea2. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/DEF059902780.