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 0x9785b335ae741b75793babee45617a721f15544f306a62b95f83d983adc26e9b. 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/abe552a7-724e-4381-b40f-ed35a4ea2578.json and https://artists.proofprofile.net/proofs/artist/abe552a7-724e-4381-b40f-ed35a4ea2578.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 0x38f4f81f8607875234ae61a5a7cbc138fc4634534051b6d7bd9d35beb854d523. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FRX281571447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24abeb36a7af887f47447c0931600751eb1bc2606193fa5b79a3aec4ed3534. 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/FRX281571448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b802bb58f90b65f5464033356cd77f522973180e40f9435f39e77ab8ee83f3. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRX281571453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a682fc8b3f684515bd80cb921efbc8afb1149425180a467649d875ee8b18e6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZ4RG1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbd8b3bec09dcc56f138e8a1e6008291d300f4d7ed8000690d9549cc1d3fe2b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZ4RG1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70f76f1de18723cc5b9affad3ba6145ce9e48180eed1544973261cd0f9aea56. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZ4RG1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a22d73c4e2c698211f7d132380dd37f3399c2345bf17890a9fdb8ce5bc727. 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/QZ4RG1900053.
Dreaming of a Revolution (with Raul Malo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38663ad8909daa1a73eb7831d290c3b20550f4fa96b33f33f8c708eb6bffa4a6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ4RG2100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6feb0e4c27c315d976c216312ab37b71f1887e3b88d61000f3fffb06daba258. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ4RG2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1bfb481cbb8aec79c02a8576eeee9b9e82ab83da74c40ebabcc2035dc2aed1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZ4RG2100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47972702705b181848ec43c43c2850116fbfec2887c413a72d208abfbf4f1609. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNC2445436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69ea9b49b0e8c4e8cf5fe65bde2d67a719afb164d6df0cb9f199683d1d2bcd1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6K2482492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5277d00ec789c4ee54eb7028b54f0702aa8dc47233533fc343340b3be8cf93be. Chain 2 (Bitcoin): anchored in block 957529 (2026-07-11T06:30:13Z), 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/QZRP42437113.
Tales Of Never Ending Rage And A Beautiful Disaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d939b790decc02205fc45d513ea709308393e7148e013aad83ffd4084937dc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFM2411598.
Objects In Mirrors Are Closer Than They Appear