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 0xb6c05c91f8236b101e1c4bad7769ad9a792bdff983fcd277789ced2276d67fcc. 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/0c1249a5-87f7-47aa-9d49-7540db5624f2.json and https://artists.proofprofile.net/proofs/artist/0c1249a5-87f7-47aa-9d49-7540db5624f2.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 0xe7a85c671b2c7c8acd98da7ac485b897b638e3ed849012c54e0cd7f65aeac3a1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ3V1174930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7121d5a896a5fc70194d317fc29df787eb9470b20891854d867df05be3ac7937. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USJ3V1096364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3396488c47249a7d38dd4ef60a6f701d7a75c37671de75b8d1072217ca360d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:20:56Z), 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/USJ3V1096366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad76c31eb0c2c4545f944ffc5178d39f243f381ba66847a7e937c0a9420fc438. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USJ3V1096369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4953fe485bb93969da2e055f99373feed9a16268990b59d1d8748eb7d2862ea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJ3V1096370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f90be106c5dfbff4e3c559f61f3b4a105a913b45461e0d5e917724da3ce7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJ3V1148505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd99846e6141d8efb891d4de247ceb0b8e92109538f35324b7e2e3682fa9be5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJ3V2141076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630d24c6264fdb0abc1d5e6bd4b4b42f7e1362feaa14999213e68fa483f55f8b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USJ3V2141077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d4a815ee2f253d027a4b572d913757170828990ac23d4f39b007cb72073ec. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ3V2141078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cd109b65e837baed017270f6107f30f394b9534e51234ae6165c134813f13f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:06Z), 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/USJ3V2141094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd43d56b4aa66db5f9ead29d65a010b971801632db133cbbb6948dccbf0ad8. 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/USJ3V2148576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d2a5b91b22d4260594820ab3c88a6cbcc8455551426eae6d62d81ea85b93b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USJ3V2148577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01af81cf75eb41178710e52e8ba8aa0dbcc8e9219daf78361d2a8bd393b3e2b7. 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/USJ3V2148583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ed9352a35acc41c513689295a760a4519a3a3bf2473477a9a15d749b44680. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USJ3V2148594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807bfaf91f7dacfd40b2db3729ba3ce39e045b2f15a24b036a4eae6be9d7beee. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/USJ3V2155573.