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 0xb7a71ec5e66fb7630c2835166ad118b20070cf168de29a32274f6a929bc10e00. 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/b1ffd82c-6176-4039-877f-50af33023d59.json and https://artists.proofprofile.net/proofs/artist/b1ffd82c-6176-4039-877f-50af33023d59.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 0x5761543d419fe5b425a60f49f2e5f2fa1ddac2b580e9c05591d7da487ac8da1c. 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/USHM21890867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0777c699e4d5a0a8c20c87ef4ea5a99bd0d35c3e3464bc65031d0dbb3f40300d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USA2P1906188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f4d4451954c6f74a7f4ac75cfa1dd2a682a5affe604a479c62bb4458b0a99. 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/USA2P1906189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac611fdff906d2826f91c096494865fc736bdca09abce1e410ece35f60325eb. 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/USA2P1906190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c196bf50284952a0d6794cbfd2d9e47c4f665ae8ce5d4220e5cabfdcfdf866. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA2P1906191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a6ee48e5a8d887e8ea010cc7c046321ac4e7e53e3bcdbd2ae876380e06223e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USA2P1906193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb1202981c3e8f6e835baa72a407d89f45a67dc52ed0ea2002de42096d38c2. 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/USA2P1938764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28417ba7f10a872a36e1618854f9290a29da9f1bcfbb7a2738be8419987c2cee. 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/USA2P1938807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1a99c8159114eb3fee053e217c9c55b610ef5584eec24fe25432af8a875dfd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA2P1962726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93f5beeb44c7dc918941c7d4fcd5e7f60aec842aec7fc62bcfb95a1598213c7. 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/USA2P1962736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b24b12745107c720cc2aeab64f9c5e0878ef83028ad8a5d646aa85b9296c3c9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA2P1962729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9da7697be9030d56e1ef7164faf10d27061e08f0ebf2352dd0e7d66b86123b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P1962732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b3aecd99e1956260a5a9cf508f26e27aa14845c5f725a64dd88f00f12df66. 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/USA2P1962733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c69732b22412ef0225be4e7ea026d2803d80893aace7a9402a9caadbe72614. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USA2P1962731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed628338f36ef2df66f67ac42a75f7b21f2dd9ba4ddb8c57f0f07ba32ec1e25. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USA2P1962725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a26bf899aa0c4973aad7396c08fef61730dc533bdb8ec51a060198f13a1bbb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USA2P1962727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c43de694c95deaa1f4aef217738b4ac66eb2bc8b95d3e77159b62b018b4f8da. 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/USA2P2102016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6fc5743ae32e09ca1e0d6c73d2b39dcddf2d9341d0d516109070029c24cb3e. 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/USA2P2107753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c79f839ff691d4463bbe9cec9cb062db843ef6154c1f917a4fe0c8fb8882f. 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/USA2P2116231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470ec7faeff34b9b4455d1f3b48acd9701ae49179063f917865116509a545bbb. 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/USA2P2134930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8da5204c20ea14b196336e05ce7f49b75869cb7e7f55e0e1c5e259183a8a60. 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/USA2P2224448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e6a45df2e192fb2c4e5afdf3a5c9f3e36f90314722a95f24d7d2bf605650a3. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USA2P2328085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9984919984a555e1b5204e18e348bee16cd251e7c9facec93648a27d34ed2fc6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA2P2459583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b66c1c7b161240e023561a0a3ff830edfad5d09cb93b0e1b74024adc695f9f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZQMB2108541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da92882fe4dcc37ac5604d7c159273d8d9b44da86bcf00a1274df683adbe0b1. 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/USA2P2522297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e4864fc6030ae7d12d74401a1ab1f5925454abc745afa8b5c5f83e0b9f22b1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P2525488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d42b691b6e3f56be739e9c81a11c4e15e66e7b6205a23d74bfc500a7fff6740. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USA2P2528847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a08dce844c672cd2909b57a66abf126c7fbfab25d047c1a369bb3b0cff42603. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2534311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5b321994fb8764cabd4638ea393c23aa9dce18a2fc481d0df00de6e901bf57. 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/QZDQH2526507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456548d70df0eca14cf8eb06d00a69748e22938cafec187d5b003a65efd7e31. 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/BK4DA2556157.