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 0x0ba42e8aa9f2a0f2d6b4408b9b52a33668d2f1466fbf3a863d72b302db5646e2. 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/abcd95fd-11a2-4e95-b887-95f2550cc92e.json and https://artists.proofprofile.net/proofs/artist/abcd95fd-11a2-4e95-b887-95f2550cc92e.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 0x6a86bc5fe036ae646dfc63ca86ae2f8c29850d9d876bbee83eb093d0b8a5f006. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022005776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6ba3465424d8b75f87a03fae5dc7c8b0fe575ce635a04b33c3a2e9bc037d76. 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/DEQ022005777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d255ad6440f30b975ad0743dc5bc0d4ae51b41ff921bc99af9904d404ef907. 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/DEQ022005778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47885467cec338d524bf13b37fb339490afe65004481a915fad4a2f848a82e07. 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/DEQ022005779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a254b9c4a928d4c7b05f8fa4671c427639d531d514a95344cfb82393777515. 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/DEQ022005780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc406b0e2bb00561a248c744e33f55420321a530e03e7c4efede2b6ef5201a42. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022005781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6238fed16c235c1ba001cda095d38307760192f5e0f5336995e9ad6c27eb195. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022005782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0367efe69154754266b29695ac93097ba8801d8dc9e038c693ab4e0965869b. 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/DEQ022005783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218961d0d49039f94f765bf809ec69863ef1d92d289aa62ca716927ec31355f4. 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/DEQ022005784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c00e7bbf36e816792ee84dd243535eadfb5f4312d4d24b63f4f0334cade209. 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/DEQ022005785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264a4974cabbcce96020fb3ed35a213b9715f00b802fed31df18b323769b049. 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/DEQ022005786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef719aaf6cca06c3380f7b0d599820930a4c874f48ee576d91d343af6db2bee. 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/DEQ022005787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0479b83da9dfe5e9adcbbf0f7852a0fe243683385be55c58a3c9e39bfd6d7668. 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/DEQ022005788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01708bb82f6bb4a24e5e9da32161550cca11c11ee05ed50a602ff7dc3230f1eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022005789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff0108ed63bc3e69efa33a4fbb6ac80cad584a9d4ff604d500a0e4b61f1f790. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022005790.