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 0x3a94ae2683dd602bdca53f745989adfa103f244b59edfb331fb4415e489071fe. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d540f4e7-a0c3-4081-a1c1-20913ccf0010.json and https://artists.proofprofile.net/proofs/artist/d540f4e7-a0c3-4081-a1c1-20913ccf0010.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 0xb758c68b65c3752114d6440640aef12c16dece0debebcb5a312fa6da4251bd70. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:46Z), 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/QZHNA2529972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80bf494f40ef88a1f851b786ee0b40fd4eb1481a71198a6149231f2fd2f9f3. 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/QZHNA2529973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6294d582fe6c02ef5ca4a1f91edfec1b955ea444a3653f4f56a7040c1afed7d3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2529974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba280a79016fcbc10df3d582bc3a3ec699f2483d9c93cec0adcb050a74287592. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHNA2529975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea86f95f5d8af1acdc452bafdaa8719ea66465119064c1637a1086cf537318e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2529976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96c06826e321edde930dd2321b1dec78aafc99a0d339cf452235ebb55d1cb2f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2529977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0218cf6241ef35827e034fd55e0db767da903885cb334914ca49c1d851003b07. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:43Z), 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/QZHNA2529978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0747d7b3495f0b48ad98de627ba8c15097926bd300b59ed1af91a0984ce628bd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:32Z), 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/QZHNA2529979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8300082b331ab7ba54431face1a98eefa2fcb797b81165c06a7f1ee3c6e8b197. 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/QZHNA2529980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c10e40dd5de1b9120be5610425953aefe0c309470eeafeb66dc95870c7d4af. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHNA2529981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea2a809a0d4d650aa1fa9d4c47143667e64499ca084f9fbdc6ed1a4bf03b5a5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:31Z), 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/QZHNA2529982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c969fc4b1c516b6d3544eee2c219b1adff94838b16e5a306afaca6992ce44a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2529984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9914651c6f67d6b6342acb927bc8fa4423df4fc4fe1316a4a94cf4923e949777. 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/QZHNA2529985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027ad638b35fb41eccfb8667f98f360ee1d9b57aa4def69487bad6b3906d3b21. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:07Z), 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/QZHNA2529986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db10ccf481dc83d29e723ec85d0855763373e5e0e1b34a8e85e35b9d2f52995. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:34:21Z), 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/QZHNA2529987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bab655a9267840e2cac3c2397775ce619a1c0136bba022a616ca5f562d4dd0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNA2529988.