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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20e9d60f7d66dd6dd42f829b528a90ae92529872359da7eb3f8cede9af0715f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/306db096-4a2e-4e29-8cea-27b270e61b4d.json and https://artists.proofprofile.net/proofs/artist/306db096-4a2e-4e29-8cea-27b270e61b4d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15cdbba7a565e95db29fb97ba39d12dbb391cf2567af913304248f35b526f09. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US79N1010029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84393138d01c88ab57dd6a4dded219e101af1389f0b5c84a5ebfcab4334ad491. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZGLM2060349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562e14f764e28d7a4cebf47322927d517ebe401e6084c7856bfa6f143c607cbe. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNJY2015729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b28ebb2384c74df7ad928bef4f3564815b8b234fa7b4b52bc1e0e5ebf28464. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJV2072473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a276f552c0d27e5b87f6db7fc0b6b2d12ecd61fefa3ca7a2dc27b485604cc3. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNJW2073749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4023553ff577afa0ac4dd92cc98cde4a956431a43be0ee0751bf71a71457090b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJY2015733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2a89a50154fd6a3a4e2aeab99808c26f5d2b9ef96e435220066713069e351. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJY2008785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60002e530bb524622edafe0034adc290cd1e1f8094f1b2e6cd1bebc71480435d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJY2015735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf00cdcb839dfb3f1d9cc1d449ee255934ff954c7cf96d25b7faa30e10699872. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHZ62282403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45897e5fc48bdb9b93f86b92c5b3bad98fea58cfcf9a05263b580b93dfc151ef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJZ2226643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd077045f7f4071abaa040f2eee6ff033d7ae4414f348d432364f6966c428bb33. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZW9N2242626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb065ebdedcb84f969e420b489dbe97bcb92135bfd176f6807fb060e5eff4cdfa. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US7VG2381782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0768016410c4c551f755fd2e6c27deb6cac4d3b36040ba18fd0b2d201e48dbcc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:43:27Z), 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/QZNJW2350140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7c70917d605af34c78eb2feab7075546d9f1d262714c004a3df29ae02ce2ff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJZ2385458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdec37f1fb963f6317aea3065b5ce6d9e2e237763e45917672e2b8585d3e6c3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMZ92435346.