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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457da27b3ea14b6e55e94c99f750fe154ccdf40cb352d606405e9e6f74bc2d75. 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/c7b89532-0edf-4771-8da2-8e286c4a5836.json and https://artists.proofprofile.net/proofs/artist/c7b89532-0edf-4771-8da2-8e286c4a5836.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0412dbb7910428d87862024531e9eeae47b5e2b5bd79b25fa2cec7fd48eb610e. 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/US7VG1730293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1d8c5b806c0376835817e0f7eeef7fbf330268152ccfedef4f23fc5a57db12. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:57Z), 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/US7VG1730295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb94391f7a77f497286b514f79b3ce9b6f1bd2657ad034905ad16108f428d2e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLM1944916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4202c42d8083dcf1f812627869c158bf910ade0b4d86a8b978dbf7c483a24e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:04:03Z), 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/QZHZ32070673.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ecb7ba698d8f437e943ea163d71be042568441c1e4cc815627071a7b0c0ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMZ92026791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2638f170ef3208f51558a440b49a4e7326a0e4d2a75054fc924a2744f9f233. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZMZ92136350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c2297e964560a0ebf4c6259a0b5df7764f2da1b397f4091348cd56a1ac6f7b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHZ52268085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c3ea03b835498b4deeaf79523f6dd613a27ef0583b2044f8ba0e3642c82ce. 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/QZHZ52268086.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21fd06920f3ab12ffe08f2e6a88bd2b39fba68ed24ad070da9fa6f7b053b358. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTVM2220884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767c9ad29e70cbddcc486b1044e7ff082a9cbc7d57f7343a7fce59a051c2021d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BCEUW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b681dc30c97a86e2d6d5519c7d1b9df803b712b2cf26b0931ee6a4bae7f4c47. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:46Z), 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/BCEUW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2485b9ec11440f55068760d358e965327ece21882fe6e66b9ea9e1f282d52d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BCEUW2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832202bee42fd77886bc182caf2de7b6ad779f681c4f55a8ba666d68798ef761. 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/BCEUW2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0bdd206f9d8804047b889c80b6061e31f39e54ea228ad1b3c3221d08cc2f2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BCEUW2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01c853a13a1bb6a7e35140ac5c46a96dc2f3c7cda66a58a0e26ab3f30a80630. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BCEUW2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d10a7583f860843e9b9d8e46c39748eeb6cf1d5982343f3be71ebc100e1f3. 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/BCEUW2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6f98e3ec26503708c5c216b4506cba5a9ccca4b3e18f7a6b807191be85e74a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BCEUW2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50420ea7cb75096042968e1e349eb6ae4628b312267c432e8fc8635bcd95e263. 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/BXWKG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa166c8e459b89d0e32b4470e20da6d93a862d9620be52d09eeadd5709c8d655c. 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/BCEUW2100003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537556d4d71277fda01802a7fd8e7cfd1a694e7bd19d49d6adbcf11c1ed9f89. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCEUW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb5fd22fd2d6e619d63e6f1a55e5d5f2171122b0b7e742b58a3e33f4893df76. 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/BCEUW2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa166c8e459b89d0e32b4470e20da6d93a862d9620be52d09eeadd5709c8d655c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCEUW2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79b0d6b5dfc370db5f085d1e3047b468e247f94155bf31d789a73b8ebf218cc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCEUW2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8913f42a250425fc170c5af33f77b49474efc08957ac0272ba2468e6e64ba7f0. 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/BCEUW2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537556d4d71277fda01802a7fd8e7cfd1a694e7bd19d49d6adbcf11c1ed9f89. 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/BCEUW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b119dfffd7d484895e72bf067cd412a41b517db5806a2b5816410cace8d9ba. 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/BCEUW2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb5fd22fd2d6e619d63e6f1a55e5d5f2171122b0b7e742b58a3e33f4893df76. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCEUW2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd5d7a424ec033e315cd1f9001aa8939ad92bbae36d89361192aafed8ee47f5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCEUW2300004.
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 0x168311d7d2979e660ad08d2801787bf7b9a31d15c82eb00b0f0967b8e839e1e2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCEUW2300005.