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 0x90e95327f956e605afe8a5a17646aefdb401629833d5d3ce69191f9e916eab0b. 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/4d8308b2-35ed-430e-8ab1-18c7fdafd353.json and https://artists.proofprofile.net/proofs/artist/4d8308b2-35ed-430e-8ab1-18c7fdafd353.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 0xcdff2ffee5c4b1063e620403ad4073bada538d221d97b45202290f7f52589986. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEXM82100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9ca1ca7e848d7bf793794048fe51014283b7614776b94aab2b08da4351af10. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEXM82000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa255cc8ee0fc89055dbbcead09140587bbdfca7b1678f1b95f4edc3fdc47eab1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEXM82107955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20ca3e5a4557c11133baf8f50dcf276b8593fcca1ea6dc754f22a2f12b1eef. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DE1KS2403917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfce69ba6eb3a2e5867e9b622013a457320a28299a4afaf0e77c8bf750f864b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DE1KS2405790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1649fdea1c76ad819938905c092941c664e19786a0e982207fdf1fc60e74d6. 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/DE1KS2405792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2921b72b324449456c8faf71ebe37ebb7e4a9dd12e3d70719ff18fd42af8848a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DE1KS2500650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163604a6f76264a85af88c5ebc406d10cb7dbe79ae939314cea1285f3d2091ff. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:53Z), 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/DE1KS2504401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927f859e79ef813b9424aa1364b502ba1a615743a4c0c7a00a5d17aeb31db3c4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:42:40Z), 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/DE1KS2504669.