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 0xcfca82dc4282782dd8bf6482baab50b0b0a3c3fa280b13608504d5ac6e5dcc10. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0d82c43-65db-4822-b2b8-e6c6242d8009.json and https://artists.proofprofile.net/proofs/artist/e0d82c43-65db-4822-b2b8-e6c6242d8009.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 0x1d1dfa00be1b17259bbf4c482cf229aaa6bb56bbfb3b37654c0f620660782914. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CAQ8S1644653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca25a6573937906c1e359f54dcece87f1a13fc3a3f5a0aa806a616b51c5308b7. 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/CAQ8S1626873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6146236e462f218cd5a0b3799d057c791637e3560aa405b0870234496ba5efa8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CAQ8S1626876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e1b53d1e813cea477994275d948824e9ba016bfd4f06ef64a3f82abcbcacf3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/CAQ8S1626905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1299ff0b803ff70be7368279240574593c06bd194f2bf10ba069353635d5662. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1626972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c798763754fae5910e1a7def8bdebf5bd3c6708691ba61073c1d7d8539659. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAQ8S1627018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9539de6ac9eed101905e9250cb4ec15869565f58d6ce5d6063980f45efd7874d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CAQ8S1627165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b1f955a176b17b70bc4221a76f709cd77f2d0c3c3e234456b0e60bf7487b1a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CAQ8S1627166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc689876a2a60cf023d65656dd0e9e67b319e6f6b3f1cfa0f27d3975259ee4784. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAQ8S1627645.
كم أرى المبسم الصغير من ورى الملثم الحرير
يا مال الشام - يا شادي الألحان ( جلسة من ذكريات القاهرة )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae87d7b6074518171ba3ce06c5a1971ea813f2a895225db2ec18ffd4a7248ee9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAQ8S1645764.