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 0x7a0e4dad3d6393df430db7b30ad78faa293171c4aad87720911331f4f8a1eb31. 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/a3dd0d78-eed7-4d30-8245-a2e81057c2e8.json and https://artists.proofprofile.net/proofs/artist/a3dd0d78-eed7-4d30-8245-a2e81057c2e8.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 0x94f7a0cdd3f22b12711db60502619e0e4b19592966aea9539e7b8fb9e7cf064c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:26:57Z), 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/QZW9K2375773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9a3699ee79ae9c52898d204152927362085022363ac70c6b511def401009ff. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/US7VG2432185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b354f6eddcb77964496ea5c9faac0097935a877649dcf0c5ec13550ce62338. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c10783224ef3826a03a1ffdf184fd9465173ada1199710d6d7403f566a5e0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB2422393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f9967552c9dabb923912b84269868eb94d8ef7c6cae7d9bf2c1aab81a87c7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:05:29Z), 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/QZ5AB2424976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bee870b9c5eb07888a3e4c6ec466e2fa96c15ca2c36e2627f0a3b609eebc51. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5AB2423291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435498772bbf4371aba03d64b19cdc418c07fb88a6cfc75324c42d068f0f02c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2436173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443077a623a08b6ab3c835730f390b7b4b9c892e3705b908931058e6d8571869. 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/QZMZ92516706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f0de63b8fde0df37328cd57ab602c7a1b55648df59679ef38eca92ff43193. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2485442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1006b6bdf834171408b3565ec2f43b632b690cd933936fea77ebe6bd10fbb57. 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/QZPEW2448219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b75a6c96aa191be5d83ea313976424fd65e691a317849404dd20e421b719cb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2465289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9bb1c3941f1ae4924b01cf30522ed268340df84bddbc39f9721d0a097384e9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2430192.