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 0x2e2f2e5d884e4e9f5568217348451f0a11a8b883804c5ed0914b8232a3842d78. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cf2e5b9-596e-4778-89e3-8613731a2c56.json and https://artists.proofprofile.net/proofs/artist/7cf2e5b9-596e-4778-89e3-8613731a2c56.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 0x6d9a4c8d8c15ee7f52446497ce7c7efcf4a5ac3f84e4859707592d7538982178. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUNCC2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dd770f2a4b56e45d4531198ec497f844a05b14cef2d4672c77b6f12f52303b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUNCC2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5cd2fc500e5ae1cc21b50275faeaaa9c47c2817fde0524919fbcdd4fb42a28. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUNCC2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eaf5d1e880e38be0693a4e1a4a3b45069f90dab783dca60fc11f3132a697e8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUNCC2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47389283bb572373e120771a31de0592b76fcff89e182333db5786084cbd6ea7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/AUNCC2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062f027b13cdd3270d96cab606d9a16e7e7e1bcb8bdb12dd68e33fc2f7e7b5cb. 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/AUNCC2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d582328e4e282747552aca42f1d7655cac2cdf3f007c781eb790a70e35ccab. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AUNCC2200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a1941457c14acef700b1ad6c592cadbe4ad64127b952f72504074cea95493. 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/DED832500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a1941457c14acef700b1ad6c592cadbe4ad64127b952f72504074cea95493. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DED832500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a36defb2457f84b6eafe5fbeb3d98a66c90a5a03312ba9583ce8c79fe344af. 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/DED832500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc8d90690d8b782f9eb78952be51ac26af3e30f29b6cc79cfa455b28861b8ca. 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/DED832500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b8e69eafd5e7db4933dc0cc599b2406ca3c1afb1d3688ca82e64574950d137. 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/DED832500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c21434c3eaa745d79dd8971b3e5f25b550d224b14680852dd8e5035946d6a21. 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/DED832500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1583205411cf28d431ad2e317e042aa12f3294ea2d4658c00b3e1d7713d004fd. 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/DED832500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705f07ef11975fc866063b6f5da31f848644ac0856db67ea7c307d293430e753. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DED832500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5eaa53c5244483b4222e885b535e354bf327ca5f963bf5c35cfd4ec8094455. 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/DED832500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4fdae31417d1fca11b810b95646c77150813969e41ac431f52c6d7a1649283. 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/DED832500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff09c588669ab14d63bfb754dd08d86a19aba1d6f4d330e21f027708545df33. 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/DED832500074.