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 0x59acddd8d68559a754e7a75f4a5707b9d1d467df6805cc02fa0b7a8ff9f9735c. 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/a02a3322-bb38-4ac6-b4ad-34d3b2d8b0fe.json and https://artists.proofprofile.net/proofs/artist/a02a3322-bb38-4ac6-b4ad-34d3b2d8b0fe.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 0x296543a674bba2276e10485b7da6966bc084818a8d4329b3c9ccdf58525c8c04. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ES71G1744518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145409779b9e05ec8e13f7135359c323cd7a75a21e1d20f2d2d2baabc646c8a. 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/CUA011903101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27108b3083d73b47a736bc4793e338bc2dfc78774e43e436d5c451daac80a7. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/CUA012102501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba1d7fe05168fc417db030f11ac9330fd917872fab5b224872bbf671889f80c. 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/CUA012301705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35e4e46f7b46bc5c598ab6e8766fa2b47ddbb49aa34b6435a5ecf7f390c143a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/MXD782500641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb458ee29f9b4229223dc386e9bfd92819341be1464121b82245d410c9f556167. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7282529100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39112409a02e4d1f8c96ea49069022903923eb29147abac041de9aebbd71b0c9. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QM7282529070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeea99fc5aab03177a8bc1de94ef092b40e8c958c6c294246bc7f6137200f5d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CUA012101801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171b9444420bee0e7b8250e572cb5f80a058d7a3452a7920ad435dae47e0badc. 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/CUA0R2100001.
Siempre Tu Voz: Homenaje a Benny Moré en Su Centenario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28fe11d69d7b243f4dac8bdabc9b4d494c8d04451dcfbb5126768e84ecb6d9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CUA011904701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c4a411213a04589680ff9d5c2ddbbe9dfa73f42562079f6315e08d6bafed3a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CUA011904702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9827a118c29ed6d20b7b14b9aadc66f123067a20dfb2ba52bbd4f9423a6f5a06. 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/CUA011904703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae2b23e67ae5ae60a42c68f8739ef84d9feefbe09d3f6e9995f8f3b0ccb5372. 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/CUA011904704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca857293ec11332470728546cb7ef0a1088f5ee2cf9fe45b4fec81781f9eba6. 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/CUA011904705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79003e45e74862d0cc611b0da8e3dc4776db15a16bace0234299b26e852f74b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CUA011904706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7be395551f07f552e6b319468e4a7eed62e771641fabdc203fd62d21ab4626. 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/CUA011904707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240d43a31ad6d90d6e251875b6367135c3e68c6868b88f96f74da8080ab6180. 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/CUA011904708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0250470a5ce200a77b10203d66e7b38c0eca087ce12e8c3e78b2ce3d07d14ee. 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/CUA011904709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a423846a105fef71dd9954e386bf184cd7dc8a3fbf33ff467277193bd1c80fc. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CUA011904710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa040b57f268afd12fc75a232669d0336af4c8d5d73c091ffe937c0428e65ff52. 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/MXD782400746.