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 0xb86486ee0c8edd59b49625e9d4e73bee6d44a1f330f95774e4837354bda56223. 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/d749a23f-1d90-4483-9ffa-9ec465690456.json and https://artists.proofprofile.net/proofs/artist/d749a23f-1d90-4483-9ffa-9ec465690456.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 0xe3540da74525920e11a8dccba80c14e5ecc0cd6551d0afc13a85bddb088ab1cd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IDA141703719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238369d0365f90193e7e6e1a78189c0e42c189341dd41892a9c3c4b83f94edb9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/IDA141703720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae45d0a0ad1ef97bdf1f61934b0d8f732b1e6d106e55c2b3e7c08cc18980a5c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/IDA141703721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ec3bb3facebd2da44c640da55c7d9de31d997eb8dcc6a1050ba37717aaa97f. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/IDA141703725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a754407f31241bf3eb2e4b8eea5362f02b55520fc37749f05e67c44fd81f15. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IDA141703726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b9283ff8ee244a04aedbeec209c8114ea5c72f3f6d535a05f3e4d5b3b457eb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX201633424.
Jeffry Rambing, Vol. 2: Ku Tetap Cinta, Ku Tetap Setia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa157f0c3671692ae0bd373f46134d06499dcad0f4a9659d3558aea9146d1242. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IDA141401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925ffd5b7222e185d32d1de4e971558a8a3b107c86d299af8dbea32a6b8f711. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IDA141402322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0417725c061789d295b17e3e8b926eb7b56515a23077dbe263455bf1e51d8c4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/IDA141402444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e33cae704570fe682801c50af57f073a76e36e6b2803dda0ee693197da8c33. 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/IDA141704631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61dd74e2769a80ccf29dc5643dd6e2808f7d29dafe365c74d65944b0dce7979. 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/IDA141704635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23276e3d864c02828195c2d783ccf80ab02d2514f4d4c66a0fd1a1a5d1ad5d65. 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/IDA141703565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03201b5e9ffa11031a9cedafc06bf3c311e11c328d3e18bff1bb7435842b507c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/IDA141703645.