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 0xcc83300c1e085b6bdc09560680d9069159f8371c1a1ae79fdfef7ef2e0d95e81. 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/cbb1bc37-53f9-4253-90ff-c1eadc3a92f2.json and https://artists.proofprofile.net/proofs/artist/cbb1bc37-53f9-4253-90ff-c1eadc3a92f2.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 0xa6c93d7fba6213e9c09623a024d2613cef2738baa96d0b67bb93e88fd675ad75. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM24S2106029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5060967ecbb23c132e18b9d96bb4ab6660833a86494a5c10c62212a3c79e0dc9. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAGF2247788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a9077bc9bb285170ad111abb7b3e42756c6e209a108db6e3d1c3fb16c01839. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP52459414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a055a54df4d58bf47163484256d24bc72ec1e7d90754a711137999f51e52cae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP52459418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727c8f4edbb4d043a53fd3e3a5302a3fefd61bc6cc630ccc4ff1b4028f43834. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZRP52459423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbd8c954fc87337621815145459aaa8d88bb02af20550ee0d872cde845e4566. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DK4YA2369001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fa04eb941a8c405066b942d99fb1870cf5eae55c8da05a638b433fef402bb8. 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/QMF922450064.
ASOT 1155 - A State of Trance Episode 1155 [Including Live at Tomorrowland Belgium 2017 (Highlights)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033920b1a2dce2ed0920e301a0d4cf94706556ead2d4c3b3428eb7db973c231a. 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/NLF712400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa257948e8ee9cef32e441c9e301baa4e86b1cbeea41d1754f9c8840f0d465133. 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/QM24S2405766.
FYH387 - Find Your Harmony Radio Episode #387
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a7552f9d2740e4c167c0b9c76b834d9874d5c75dbc5fc9fd06792e3c7bdf9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2407869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0876bfea2273abc309cc72d2e45e04c0da9ae5efc1a0092989eef4502bc5ca9f. 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/NLF712400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b91e2d12eb2b99de558f7f0e79d82908a9366ce95ec95838721aa0f63ec740. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLF712400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb330ee31d6884eacb76e25d7439a62f1f9450b6c60751dc6c81847f1be335f4. 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/QM24S2107612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df51e0a3cd1975c9cdc646e6dd53d15e5e38cbe35b65e7e0b5489cd5fd1c3da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEM2483630.