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 0xf27673484ae7f7380a99b134134b8baab5a511e64ebdc49bbdf71b722dffbdc5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5352fbb-5cbd-4e6b-8b91-aeb443c435b9.json and https://artists.proofprofile.net/proofs/artist/c5352fbb-5cbd-4e6b-8b91-aeb443c435b9.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 0x8db61abc914d883506742c30926fbb5d9bc437df245fb12d6ebfd12b2620fab9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:19Z), 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/US7VG1882596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f076100163608fa946a72be10764eb080df740b5c869c5ad607f97a232da96b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRAPI0301838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2479dd77dfc42732d6e78a82d8a04a28f31fca1f18a18fc23c0f9f4ebf86344. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:52Z), 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/BRAPI0601018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c3d68558cf1d7951f9b782f88aa4af98ab5b1ad388d40964017ab10fd30dd. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/BRAPI0301841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e229f497badefbd33d612cbf542c2b7418e35334aa997dd87124a4a373fc50. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRAPI0301843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e9247971cbdf5ad05f6b74090624e24a30f4e00133c4694a38d6926d52f519. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:00Z), 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/BRAPI0601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0d0e6d5f3cc925db0ef4aa41a39c4886803f33105085e8e233dc21ea8d4d2c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BRAPI0601021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc70c67e9efab8b41dc3b2107d59d7450e8d31254eab02b9e0f2eb76a89921cc. 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/BRAPI0301835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e7aca8dc45485e50e8ea7005d10b11cbba8dfa0e9b72312a0af6ac6974c647. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US7VG1908585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98baf3d76cb73d2e085a27120be19431d73086c3aa2ef828ae6eb5f3b74e329. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:15:31Z), 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/US7VG1908588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67eeaa6f855a308aa7b69c30af1004baf44d2457f822107b73975e18132f46. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:02:32Z), 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/US7VG1919744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9938ced00f6ce5068562e11edf872fcc2549018260068e78db60169ab5ae3dcd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US7VG1919745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cef8527363758ae0a505beb65da84099af6ee05f422ac73872a6d10b3afe235. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG2050544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d99335dbd442d7a109210dce8131880458c954d7731cb9269f00de924645ca. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US7VG1952585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fb508769ac3f41e6a49fa96f61a8dbe46177afdca288f1f1fccaa14855bc07. 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/US7VG1963174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b3498749d3e8c2bff8a4e0ef994c26f0780a7b0a3243cb54ca1b33dc199bed. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/US7VG1968717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3388da410ffd2abf007d0885f2227dc88219f08882d1fd17daf694aab6b11b. 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/US7VG1968729.