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 0xd7850e9a1ca2908fd54f4f41cd584ca90ab9e0a0f77c0f96af4fef0f4ab7d806. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9306a3b-e9e4-422a-8ce5-66907bc6233f.json and https://artists.proofprofile.net/proofs/artist/f9306a3b-e9e4-422a-8ce5-66907bc6233f.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 0xabaa1c43b62bde9e544598f69ef4348c74f24762bebe5fcf066d8d45fdfbf12b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCACL1692529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f482bedcb2c86096bbfee5f1be1a4d5a672f5f79828b65d7d4498174740985. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCADA1768628.
Touchdown (feat. Ak Do or Die, Twisted Insane & Fred Nice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69930fc1760e0ec4904093b0c54498620b87f5cbacef34febb4a782f0f373949. 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/TCADA1768644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ffd7e432ff1c310ae7c85110add54a366bf593d58354dc9210e3f5f9a1921c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCADA1768685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627676fe2babb7a43607410eb0f94be143e18de4f76b2adf5ad2e87ac3e35444. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADA1768696.
Sick Thoughts (feat. Twisted Insane, King Iso & Dikulz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc017ef637670cc4a941982f6a5ba6eecd8e784ff6820f0028860316e09541e71. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCADA1768697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b909c3e1d20612041a103b08da74d6c3e6ae21d4f7a3dadc84494b0763bb10. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAEO1918402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e744ac1ea06a14a6ebdd2081dfa03a6468d09688b8c4b8c4fe138abceb9b5f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAGL2275641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8fc967bbf7be971700d0ee7170d17c1de034fa5bc05e905a0fbd0239e44104. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAJE2446634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b6de95b0e89cd34eb70a186e11f73b7dd446c9c9d9035d113f55cf8da20cd. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCAIL2463232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc733765a3d0d7ba347bc8362c21869f40d4b24b833793c6ecb215087d7061f3. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCAJE2446235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e744ac1ea06a14a6ebdd2081dfa03a6468d09688b8c4b8c4fe138abceb9b5f. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCAGL2275641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae17a5794c6f01bbd9d98d8402a857f56d78c5e3e34940693ef9ca1a8a36da2b. 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/TCAJD2446434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8810167cbc15c0798735df3b443b0626ce1a7df8ab02cab34cdcd59f807d0. 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/TCAJD2446453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656856da3cf5525286b4fd7adcf76f5efb1559865adc73c1719d508b135d0d4a. 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/TCAIM2406624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee512d2d4053c06c4247be09bdd6ca46deb619abeb0d3e0a9ba3c15680effaa9. 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/TCAJE2446524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359d5a0346f518bcaa39922c483fc0d6d5e32f51b49c7518491cb625a2c8587b. 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/TCAJE2446568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669fdee6ffa61a806ff871b1329c03e61a3667eb5430e6982554c08ca7e61c5e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAJD2446619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8fc967bbf7be971700d0ee7170d17c1de034fa5bc05e905a0fbd0239e44104. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCAJE2446634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9461b927e809d32e51363bd58f1819dab426efd807017a59c26535cb99ac0e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAIN2441796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceec5ffc7c56dc25599f2ec5757c50678261e2a890b8fe36087b96abdbec9de. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAJE2446682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc600c43e60663f4f1719d1f692abf80c4c4503826f74caa51bf798336c24944f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TCAJD2446702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d8fecdeefe0dae636469418ccd93ed124eb3d332a182501b65c65fd1febf6a. 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/TCAJE2446720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ab138e180bc6eb5209d96e1aa723983241535d23ddfea428065d39d52c72b4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAJD2446740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c7d8b23b0e50934772325029c206c5b6b0d30d63f0a086d7ae37ff4129703. 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/TCAJD2446769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56ca36919aeeb11a3341ca783f3c9dd05c6ec8d885264e5451afa660b50977d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAJD2446780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ff5b0485dd15229e7de91ff1d6884584148b1fda9fae04e99c942894535ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGE2298310.