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 0xfc22c146a17d4cdef0cd97064dc2e76dab422d34b3e4d2421eac781d68c9fb5a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa09190d-2521-4155-9f5e-edc8e09d193a.json and https://artists.proofprofile.net/proofs/artist/fa09190d-2521-4155-9f5e-edc8e09d193a.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 0xbc62b0d038cb0b223ed2e9a73a414097b9e81eb770ebe1d2ed7e4e473f7f58af. 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/DEQ121750283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ceec97dc329d592cc81181443b130b4fe6a0057f1b83f19370228f22e6604f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:22:03Z), 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/DEQ121750288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d2f30d32a96d59a77c2d577587abc51d8d9cc86fdb4584e9010e101e4f6033. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEQ121750293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc550b564e4055d8b9d800a33747c4c3b89e23472ec8cf0909f359bbe45751f1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:04:16Z), 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/DEQ121750295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9891a6b3c8463231bc42f156f53000078f1809183b03821b94390c13627f367. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEQ121857843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7bb02387581d036f65452cf957f10c19f04204ea107aedb3accd49b1219803. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ121857851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf467e86a15c7a4671a8a46334c3a1eb779889062a63a840ec1c967bb89519d73. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEQ021906073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba05366a9430bcd25152395ec708c4f28c247adec9d06497e5caf71e61e0e94. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEQ021906077.