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 0xb71c910341d227d5df496037dc61def51565fbfe489ebde9bacbdb2b85b01ffd. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c593aa54-03bb-4ae6-8922-e07557769ef1.json and https://artists.proofprofile.net/proofs/artist/c593aa54-03bb-4ae6-8922-e07557769ef1.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 0x6c9849cb7a0dfe11e135f38ccbb53ac945912f4340df03eb6e0c8034303ad3ab. 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/QZES52075995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2b5fee60d569f1eed6ef2e9351e26014509dca9520d5258f7400da022d6c5e. 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/CA6D22100648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d821257f7dbd64e9ac8d3453ef07500a8d195636438c2558c24a8048a3a3ba. 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/CA6D22100649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe773bfa4be584181f9c95ea678f968c40effe6fd3af0a720f06eac8f7d509a55. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA6D22100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3854637d650579d41a4b3625012d93df34ec654969c3ea3a4f57421275d58c. 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/CA6D22100651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd27459762e619e4d557c5d37ef3806a2145cf1a6f1a5482976e9f1de5c528b. 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/CA6D22100652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4c78423e83108fd80925c3a5c9115b0d1d74a24d77d5ff6513287c6389a0f4. 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/CA6D22100653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc13d2fcf63a86604ae253effd363a3b0edc5dc0870c63fb0dd22f556e24d21. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CYA112000640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d36c9aa7215bcbb24b3bc2a608243a87c7bb0e5e8efb5c6c82e52e37c9ea8. 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/CYA112000637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee076104b7ad419c654197e96d7f61c603eb30722f19e3d256d98bc66b09179a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CYA112000658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcc419e4ea12e086b4fd233897e452560e1b3ed39be021dc448fb116f8e9d7e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CYA112000652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c02f65678a7068d9b4202485aa28417a696f8ae936e58a73f82cece397ab4a. 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/CYA112000646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e0d3f8bc4124a5acc7608898d21942c48116c45c946c09cf027149b0e121cc. 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/CYA112000648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b201319c08e19a161f181c7c743f1204972594de5fe5034870a90ce25529a60. 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/TCAFP2149241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0048175c5122bd309ef32dc30e8acef851ea4b09d07791dd43e412d1688d34d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAFP2149283.