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 0xbdd3568327ecb0c4880d6f70c24e735cbe36e74ac9ab9c6cd11a90512788c320. 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/dfaf5bc0-7e5a-42f8-97df-464c4ba053cb.json and https://artists.proofprofile.net/proofs/artist/dfaf5bc0-7e5a-42f8-97df-464c4ba053cb.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 0xa896149c759a361cb4e4552f5c128dcf80e46a241de0fb502333c5ff98c6f29f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/SE6I32484409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f5871f39abf168e7ad81afcc26ae06a9cdd5fc9ddfaef627c817fa8507722. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/SE5BU2434782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdfcabb978304bfa45bff4746c73a154ce983195cbd9263af6aab7706a29b6d. 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/SE5BU2418564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40e8a99d418f0164c3ea9843b628a544b327899139ee8be9a46828958ee5bd. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/SE5BU2434784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759b19bfc26bf2bcf21f767498a6be7423285b05088f6b1b247268cadf5a211b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6HN2405566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cddfea109679f29fb30bb196352e62617444df6b1c495f0ebaff82763bc6789. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SE6HN2405569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c23c5bd837c4c0c4d6ca38a0917288bab3e5669df3aedc9e06936b96598812. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE6HN2443257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a7bc6c93ae366e7e02f3a93072071fc15e52709a36427fbc869aebb5278ddf. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/SE6HN2499899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f550971dc7b70ac24c0b6df10d831ea30a9033c50f16dc5e26e870039f48f2. 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/SE6I32410244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64999c2a051fa8381414cd52034ffcff69f1e1fa4344783e9f906a4e24d315f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB62461511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82cc929f6091f829e8873e702c5fd011f9c6c99457364c94d5b50f36102409. 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/QT3F42416697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb0ae05afae240f18e1d80cd0667bb4b88a1e45217e4f4c1dc35f75454c1852. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2531882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a5921fd6722a652ac57433271d32ce28e7978d3a400a690182883a890c7790. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZDA52587242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094050713c9f4ce19c46aea7a5de4cdd0267456f3a131473bef8a7299caa0899. 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/QZES62525809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24502b30f404d11544af8cc18479a12142be1aee1098ac7a631e92f9c4e035e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN62535315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9bdab3924d821a2a7f1037b0645636070e0a206ed7c6686d7f1287439671a6. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/QZHN82536407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8268d38e2f404876ef9ba9d644b64b591ea1d3c7751c1679dc9ad05c473340fa. 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/QZK6Q2527294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a73ddd50966ddd41c478eb3018700d0dad9c271e3233b8159b10e5d214d774. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNWV2500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d523136bcffb189612a952128a5a92746b66c205e5afd8f0cb9e027ba7d515. 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/QZPLS2568105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d2680aa330fc617711b3b8d31352775c41dfbd02933232e5c3a548de3c1b5. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZRP52545372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c3878106f696633548b8e06c1b967590e73f0b923690475989e6adafc939a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB82577473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907e9dc5276d536aedd1f2f86660aef415c33912d465c5bcbf3dcdf49b62153d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFJ2532776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3470cf202b6195472e1a52138bb059896b875df17e6a3f5a47874dcc36e3189d. 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/QZWFV2523105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe953da75e3cd6a075f4620de3b9b9b743c81f58c195525c6e6833d567eb5b857. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ762513248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba29ae712fe5b62b8e5defb3606cd320cb867cb5fe3aac4fcf2a233ff96438. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZZ7K2576790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ae2155d86489861bc15ccb8abc25f873c0ef7ab32d266fa261d7ad4a4f064a. 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/QZZ7V2549011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3277094e6f5f345f0e3e131f1f6c501ac1f9bbceb7e044044daa352bd72609a2. 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/QT3F62501466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae37b285bb0e09ac28da0eebd10d0d2295929de2ec3176e0f8f8fb45f3cb77b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F82545100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe7adf590ac0f9ceea2a152186e3d3ca21af8d34282c2a055110da2bb6fd5d5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FD2518779.