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 0x93a8aabf14d94471ddbbb318e94cf29abaf7d5f2ac8697e99cdd610f2b602be8. 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/0f401d81-6444-4638-8a9c-f69dc9ff6261.json and https://artists.proofprofile.net/proofs/artist/0f401d81-6444-4638-8a9c-f69dc9ff6261.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 0x020e07e2785de6dcba6bbd37e2b5f8d4476a6f8cd96cad76794429fd10a42d15. 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/USTME1850210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a750ed041d4a17b3c862b95555d8f2f3195fff044d6426aff0c88e7cf0f870. 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/QZWDD2352158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34042c95022d76f89c401226050c5372827f209e7643a405ee071d6c8ec4a6d2. 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/QZWDD2352207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc40504875ffe1168a1df9fde4b418d0ba2c3e19e911a6d542b319d9959646ff. 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/QZWDD2352553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34042c95022d76f89c401226050c5372827f209e7643a405ee071d6c8ec4a6d2. 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/QZWDD2352207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd9fb08f4725b59ac93855b29a73bf7e2f9b279f3f13828aea43b5015e7751. 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/USLZJ2278538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df3d94e1a71af190ff72b88eacc301f8669eb06181f7d28c2b0377174a81a4. 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/USLZJ2294617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec0990943ecd97710bd12d2284877e58271c786565ba92d6055a68349757342. 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/USLZJ2294982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6c55bbbc2832e5dc16dac30ce70e62665e2d9de45d0fb95588abc41668a23. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:40Z), 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/USLZJ2294972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe3c1a09de8fd223c83e8152061f475894a808e43a5e55f3d7e98ce97af40f. 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/USLZJ2141788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a15a64e161ef2ca7b1bb668e0e4a348e89818cf1c3600cfb486bc9f0f0eddd0. 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/USLZJ2141650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d28ede9b845f821da3fbc93e4a66a73d3a8bfc292c420b4d0876c6a27b156c. 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/USLZJ2141837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe3c1a09de8fd223c83e8152061f475894a808e43a5e55f3d7e98ce97af40f. 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/USLZJ2141788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1152846f3fb34a295e780bf7e5f01c5f9880ad62af5929c6493299b51bb72c93. 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/USLZJ2149446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a30c04111bc6b9626820d15937292cdf50cb8b8711726bb713e8c5ec0c8a2b. 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/USLZJ2149502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf909f594a40da70977e3faff174ff7266dde6bac9731275ebbff5f926131144. 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/USLZJ2149526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98bd03a8dee2ceef22180c0299498247f31b9f425f8f3c2cf2c6e1e56af3426. 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/USLZJ2149529.