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 0x15bf4fe4a5633d1fdd3673653ff46db4cb2b8189ad5a25fcfea95182ff4371bd. 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/bde596b6-dda2-4409-9336-a66560e1e9f5.json and https://artists.proofprofile.net/proofs/artist/bde596b6-dda2-4409-9336-a66560e1e9f5.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 0x4344c0410444d66817cfd0f4d24af0b2b15c86a217582c26df50a204d4e02da1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/UK6821704446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb198ac084f94642ce2d8745365cb213c2b8618cdbba5e1908abfeaafd0b1123. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/UK6821706678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe908015f6793dee479cba107dd23f6e209322efb33621bc98fa4fc911267c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UK6821706652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf242518c1abf1d072b3382eb46ddf60b6ebb4a5100bb916720a7b4fc6dfe282. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UK6821802168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fceaf86beff542e7aef9ef7f87de5db72c93c297410a843fe4aa315745efca7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UK6821802188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1946ce54db27ca57a23bc91d515712d2b9790e858fd1bb2eac5a745519947e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK6821802134.
Beethoven's Sonata No 8 - Pathetque - I Grave - Allegro Di Molto e con Brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf132e30791d65f3898c02fef881b5f4291bb64442e81e0f87ca6ce6199df06a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/UK6821806165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd484f8fed55559efd48daa532551f2665d5c25fc3bfe28d692b07194c7f094. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/UK6821806296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5099f223abdf505d975639496f095d35fcff4f8886f4233d9133b38e61e73dc. 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/UK6821805876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0718c3d3f77693e9487c03ea2ac85dbed8335a0ebf73cab6f6caa6262e55fc8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UK6821806254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a981345320b92a2b1a27ce4dd7ba173d8d402f9fbe44eda3dc21e187c43b7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/UK6821806233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8534012e5a3bb0b8b151e94d5cead15221ece60f3a6f6d9a20e9550fe57a5a41. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/UK6821805960.
Washing Machine Noise with Ambient Theta Waves - Loopable
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844167b7971fb729f2c14bb0fc262ed3412d15682eee4af931d402cdf049661d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UK6821805945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33806799d111b743a72fe099e5a6ddd374019495d79062c44d7234f03c7b415. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/UK6821806252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5242859d17b9e0be328ea884455c363e5030fe7f087d85ee29851987a4dffdbe. 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/UK6821805892.
Beethoven's Sonata No 21 in C Major Waldstein Op 53 I Allegro con Brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb643573ea6a4a310c9a06d4d93f99d1649aa1c982105b4703b28f3d701602233. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/UK6821806237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310a2a32b968b3ce77b1303abee3a44df67b8bd66c837275b46304c209a08aeb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/UK6821806257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9215096587e1b4ae506c4fbae4a5b8a67d4d393386f6f9eaf7777f48c9e7c6b0. 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/UK6821806090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33806799d111b743a72fe099e5a6ddd374019495d79062c44d7234f03c7b415. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UK6821806252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac63b11e5b29b9a6807111b13594af42d26a5f0c693789090abbbf6a557047. 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/UK6821806272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7977e3052694fceb8af675b7050a29282074e82e1b18970c17398a2c2bd3344. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/UK6821805867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53109912f6a0ce01b4661cc30542dc3229e9c5e2fc7ed239d5c14583b721520. 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/UK6821805845.
Bach's Minuet - Notebook for Anna Magdalena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d107a15bc580a35359ebe101c266284a3551dc47e2526fd1e85873c4ab6eba6. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/UK6821806145.