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 0x998a3aef9ab7f4c674d79d698cc51c0fe190cabe471287fe89b1980f35c0b0ec. 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/6d5f7b7d-a869-43da-be8a-4d4f2c83f20b.json and https://artists.proofprofile.net/proofs/artist/6d5f7b7d-a869-43da-be8a-4d4f2c83f20b.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 0x3e47064f5b37f84e8e5316aa89dd1906d2c08fb65cf5ff2650c76323a990b119. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR1290600594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92730b00ef59b5a020148b56a3077b707a3ba68abcb9f6b151544ac33f1e46a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TR8571001487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e510b401c667ebe055a8f9d5cb473b07079d4702d7547622ff0f63bda1db1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TR0190600434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82bd728374791b7cc90bcf1ff88a1a513dd25bfbb2c055c1e8b52f991a5beaf. 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/TR0530601592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730db0d4981c292a3e2261093e0f2bcb9470aa7882195b058fe7b454af95ee31. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR0220601937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa599521113e8bb97a86d99b985752be49ff50e4d9d24b3d17394d8e8130354a2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TR0220902987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf76929409bc6c655f5bb48cbb019aa8f23f00300afc35434d909463288a216. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TR0220902986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718db6f82575d5ebac3d4ef19174cfb5df58ede130bd453491a41e17523f964c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TR0011400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28bb763b25032e1e4adf26326b9f56b12781bff5c608e1a87c55eb6d8affc2e. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TR0011400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60d3bb86216bcd40cb648ef4e6fa4d693afab3e867709ca10c5d256126258c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X42077224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf790d1fd7c618a8017439973cd8849ed795cb638f04b1906fb01fcb4cefa2ffe. 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/TR0391800185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e33da2db2a2eb827b22086780f803fd26eb6fabf4a559324ac893c0877cad2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TR0940950011.
Ahmet Selçuk İlkan Unutulmayan Şarkılar, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879f158df0dfffbdb6ca43d6fe7d5d77a6b37d4c0cb949be42c8693588dc8793. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TR0391800033.