REDIRECT Return of spontaneous circulation
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d26ced59ec91f1be59a4202b0cde514fa587f1ba53fdfd0ea92c1c82708d6a. 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/e09d2ab3-da9c-4c34-b5f9-4b7f4d60c714.json and https://artists.proofprofile.net/proofs/artist/e09d2ab3-da9c-4c34-b5f9-4b7f4d60c714.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948fe338e150ab26f94bd3d63c1bf80a67b75d217088309b465c6d3d1241bb9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAEY2052594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d652cd7b8b6947bf137ad228dc5af15287e10955062f861720354cab2ff09f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAFC2039022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d652cd7b8b6947bf137ad228dc5af15287e10955062f861720354cab2ff09f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAFC2039022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36580eae9e9db7a8f98044759cc25628e92ecea0ca250b5a9ce091375805400. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAFD2099248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac2d9507ac64f4cfdd15b0e2b76c4e1c5570771b384c7943b91a24da9ec52f2. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAFD2099250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc9f375922f674dc10bd7e63dbf8dfd0546d6b4ae7f23514eeedabd6daf4e4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAFD2099252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5011864af9dbff651a968a2f9e9d6810181a2d7a153f530f94b9dc90ccfaa4cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFD2099256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948fe338e150ab26f94bd3d63c1bf80a67b75d217088309b465c6d3d1241bb9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAEY2052594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d652cd7b8b6947bf137ad228dc5af15287e10955062f861720354cab2ff09f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAFC2039022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8b2d0f31bab5e89195ff37e6357bb98f58fb5206bf51e0abfca7cf1bc4009e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAFP2117352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eda98d8d28594eb8032bbf35c5f978f37452342a8b21f24199d3216187cf9c. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/DECE82200534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b03b127a604e3758346013125caafc5c06105a45940195b5ed39502a5ed93a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DECE82300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead8b293d461e91649c1d0d5e1f6b4a2f4abf27cf75d45314048df7256fbb1e9. 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/DECE82400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3bbce6bdb5a5884111fce222c858245a49ed629f3a29d25468fdaa79c42251. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DECE82401387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ca868a4b8fff2c2cd261a96b870d6a9247e9150a3ce8d0884d045488ecf72. 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/DECE72202431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f730c13b20a6e594bcefbfe455320ac4924ef69ed7d3c0396f4fc40178c99. 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/DECE72400159.