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 0x184eb89abb6ef48c6288b097c2ce35b63b642aa7fae0bc7cfa97e9786797d93e. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9edf9762-f27b-4031-a5a0-a5f886752980.json and https://artists.proofprofile.net/proofs/artist/9edf9762-f27b-4031-a5a0-a5f886752980.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 0xff6fad374219ff4b2115dd00cf124737cdd9c1e45d87512691593cf7666efe94. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ2152491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dcb431b4d552be6fae83cdd8f91c3f52129984833a2318c679bf8cf2348277. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:47Z), 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/USCGJ2152492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d91316490e92a3efcea33f6628410df890b516dab2e198060ceaeb3611fd57. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ2152493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61ca540047510fed86e1f9e8dd18bf4d77dfc15ceb9d7a3a678d3a12d308799. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGJ2152495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a1f6ebc00f7be59f3f4027b1903ff5e9f62fdac6eb441454c9e47bfbc6ad4e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:20Z), 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/USCGJ2152496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab570c5e68dda9a9e54e9ad26faa76587f20b815378e11faf6e5c7b5719310ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2152498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dd9dcd723ee52367ee6277b04adcbcef8d44c68d95951b490cfb6b84689c7e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:57Z), 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/USCGJ2152499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5961b437b87da191bbf57959e82376250ec98223603fe7f2efc6e1a81bb388. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ2152500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df5557fb2c066aaeb7d9e49ee3ba19c4af15b69d5c9541c7c89966f29101d1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGJ2152501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881278b99445650f274ffb2c3d95bd837acec053d403a0ef90e679ba7a1a402c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:28Z), 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/USCGJ2152502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8a2c6e9cfce9671c6b5e8742c8686b92c157078154302b2875f07adf4f3e14. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:38Z), 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/USCGJ2152503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e608d97329d766269c30133a2c6a745906ad0b77c19adaa7e34be5da2b59ca9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2218768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5080e7ed6609311cc7d237b8e8b597b80f811707d66315639874a17388781a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM56S2150211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb96f45794bb2ca762e84f0f3788bb134697f223547de9c8f0be3cd83b6cc6fd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM56S2150212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90c58af0d72b9e6f6d840c91bb18d57156a8ef802f029ebfe5d3aae057ed9b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM56S2150214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e5442086efe98a6a14128a555529d288c96a390dafd0a5c93493974be22d2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:29:24Z), 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/QM56S2150215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49dc38aa980723b3f481d6a74146d4b38d7f4e80a89f5b06f4bf4040b6d36d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM56S2150216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080cc6f48b7e0f35f72efb23b997fcfc112a2e62426c8b9c6f4f808e3a84e27a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:35:35Z), 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/QM56S2150217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11a7a97b669cf1a82a169f8ee3595dfd1cde7f8afcc6350d49f62c6604cad0c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM56S2150218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024acfa958670bd72aefa0dcb76fe6b4c2f07a8b353ea83f4038d37c03885935. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM22239100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbbc133b82ce0975e480e6b8c57a7dbe4c6bcb1c4a64552b1c6672dbb5cbc40. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:08Z), 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/USCGH2366600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425c221992f6e2014db9c79a114af96f7c9c22b7229d7671ad5ac3dc45bc705. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USX9P2308593.