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 0xa5f0ddcf141968373ddc576d99846faa8389a8c49a587de9f524083799d3e9d5. 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/375e2377-3c25-475c-861a-394b84af7430.json and https://artists.proofprofile.net/proofs/artist/375e2377-3c25-475c-861a-394b84af7430.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 0xf9537c2ab705b87c54781d8df8cb85d1ab2f71dd916c78fa1735692d07ed3e23. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:16Z), 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/GB8KE2320919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b9c9ba39b07c29963797ca87134a0c0765058a5b164742f9c932aaa9a7f1ad. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GB8KE2324476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b39aa7554f1007aa23f8481a637a6bc63c0739c15835f3b2aa696ea5dd6008c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU2397877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ac4b6515e0b1827e341ee1dafbfeb778263a0f55bef644475b647f79d6993. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GB8KE2414923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd763b3f02f412d3c9f94b0d05b93e5e6e9dd3b1d15fb10f986c827835d92b080. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEVE12400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30f0a45e8483228cef0b34eab087c60b6e2edd1241fa7dbbf4271dd50c3023d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEVE12500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359c752a170d4a71c969a202a81768c184a2ac065a2de43c25ee4590868389c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEL712510034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8098468dc5bfd7c1d37b8d61cec0803ef5a027f645ad523b974e800b71e1e2ac. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GBKQU2538448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2edf1f277d4bb654281d00475bcd0c707cd0eb81a3f1ff9155e4712ec46c2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKQU2599097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c58a70ceaf8efcea910f1913628ba1d6b20ae15ec75f96a7716875dfc8b217. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEVE12400119.