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 0x56b54e7e809cfb037a425bfbb9d6f4d59e9439eb88825a69c9ed0da4df338b05. 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/fd0fe133-9e23-48e0-800e-8b3991e643c7.json and https://artists.proofprofile.net/proofs/artist/fd0fe133-9e23-48e0-800e-8b3991e643c7.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 0xf256d772ed95e6d39854a5dfc7da2056fbc102fbe322fe87cbe37cf463414e53. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBLV61813996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb64b8fe980a4e3648038785f2ca484b84972961ab53b26667198455b1e26b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU1927156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e969be742c5a0e9bcc9d3fe8b29361df25f13dea7b060f17ec087a6e8fb99ee. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:11:15Z), 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/GBKQU2010624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459dc1142f3941216b174a1242b121bc5a945c610a927d9f00c4b56a40d04c7c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBKQU2021859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d083002e791e5274385167c9e267564532e5200d2067ed0075523e92c5880cc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2094291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3a54b14001dc91eb36ea7f647075ac5effba0e200857578cf98d4160ea9c46. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2357431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b505bf3bf35ee45e684dc27d321b0f15513d3efa5e14b9284fb36aeab5bbf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812354309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6b649b4a2d69ea1ab75698bb79d9d0f9a8a399df770a4085f17a188659433d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEY2072667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a67b058f0371927bde9d9cd66d8dd49d44781a1c9907239c9d07719e1bf80c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLAM42000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe018d1e6011658c6fd0a334286efc966fc9a483291342ae303679b84a4b9261f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1897967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c66ff86524f128fc90c2a11c710e714e22d81cd749add264e29e14e17d5ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLG661700546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ca0a12145ed414b1f8795b6f0f6d7390d59d7e94eb134cc1f0e71735f3243. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USWL12401929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ca0a12145ed414b1f8795b6f0f6d7390d59d7e94eb134cc1f0e71735f3243. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USWL12401929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fbc5d482af18043135e48bb84d7c5f93662e847c70216513e710b644f65f5f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2375778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832176fa2f648e7848b4f1ff3fc184d492bf483ac2064d0d4cfa2d7150638089. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL5HJ2300075.