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 0xf523d2d224f531c9fa2667bbb40772af45d87591f98c73806a08ee27daa40ce8. 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/1f469c78-9216-471a-beeb-31eb361bc507.json and https://artists.proofprofile.net/proofs/artist/1f469c78-9216-471a-beeb-31eb361bc507.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 0x1e24b3234c1d882f2b0a45bf17c76df5b83db6d11c0ef0233e1e1ee007bae0bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0L2454662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627510b945047b063646b1650624061a78f833b0834e1a26c8b98d250c8f33a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA052299900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f30fcffc8d30f4c21900ca27d5476b1c661ff3bbd9d00054d5a06dbdc65884e. 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/FRX872283824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988701461f4f0b34559c0877b7573dbf068b6994321d044ce91c273bef0a46ee. 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/FRX762297516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88bffe44bc2f9cc72a6c9c33418b66f068ed3f1893cf3a86aadecd34c1db1b2. 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/FRX762248190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f78b7719ffc27f0e0d5eb009c787b7d3a023edd9aa308e65a01a19c76958695. 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/QZMEM2151614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9ed4fc851bd07b80a6f5c5ed09b0089c808370dac06fbc84736ed619716c37. 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/QZNC62204170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6280c204c4c7dddd7728679bcdebb326636e937579d682c73fda0befafe801b1. 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/DGA082274558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230b4e29106658d1ef2ae0c3a4696e922ae06bd7011f258100d7eddfb8ed3a90. 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/QZNC62204081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c42901bd63f2745f3a3c6ed71108e7f6b7f2380af2e1f07ac035a554a61d2. 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/QZNC62204033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70b66a392b11f546e86e3bfdec74c9909c6120f20ab8337e50ea7eeeff8f73. 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/QZNC62204177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70876d42d5e7d61969ef77410c6613940ac22477a616093edbdad90d04ffe13. 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/QZNC62204034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba20ac161e8b9c79c7a92dda472578afbeb24b9c851946e249fc40cc0bea2a9. 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/QZNC62204032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1167d1befb2efe19fc52c89386e638e913e77902d048c1085168c8416d6c34. 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/QZNC62204080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c536259a5eb600ff895e76ed0419afa6c68a9ed7e0a10fedb44ab2849778474. 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/QZNC62208891.