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 0x77e61e47bdafca2da9e8be40538967d6a5f45e6a4efb8e13a8e041d4bbc8a0cd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/754183bb-02ba-4450-867c-90e7ae502181.json and https://artists.proofprofile.net/proofs/artist/754183bb-02ba-4450-867c-90e7ae502181.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 0xc2c83f52123d40852df6dce24b60074ba18aa9a1b73b885fdb996f78ab9c0a39. 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/PLA550000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6138c5ac98d8c0a233d1366136b6ce150fde1e8218acd115b0d87a0ed16635. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PLA550000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b46990d343bf501be88193e043c41d25c7e3c37f889a70ba74692af76a522b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLB961224703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89b4cb144339cb1844fc394c769a0821bc1d850fdbe81e54655e9b838319d9. 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/DEAF71482039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc24a7df1e3284e96c1ce9c889f99cf6ddfe8a5e33448d2721971d4105b516. 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/DEAF71482040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22f837b918a5b6dc74f16206eb42676475d5d3ff91194f0316d933a918a396a. 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/DEAF71482044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6e22cb5a8ac00e4c7ec0d3cc23b5b07ef2019846bf5be1abf34e20ad34dadb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEAF71482045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958e63f7d19f2f55a4acd7177da33d90d62028475d8bd51d4940698fe7c2128d. 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/DEAF71482046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61e928d0e4bdd7cc43eddab27f7003e883acfa3852178267bbe1e5e565e85d1. 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/DEAF71482047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc13bb9cc3e17524d27a65cd19da90e51f8cdc36cd523da49853636872e61b94. 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/DEAF71482048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aeb4c7f398207d38fc9188bcd12b1dac6d66d734cea830ab784e32db976f29. 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/DEAF71482052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8514bc066bab78dbbe7c7e6da2e9905958c3e94a72394a6a5a4b3c5501bf2bf7. 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/DEAF71482038.
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 0x54397398861881a7c6d1f68b39ded4228deb0bbcb9d1fe19e1bc8bec4c6b4605. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEAF71482041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1950b1491c428a73c9224d99cdb78af315791fdf834754481df16ceb0e5bb782. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEAF71482042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6610506e224857641c598ea9eac69c4dc718dce60fa6a0eadc2aee9b01decd5b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAF71482043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139f77f60ef44422050b2586be439ee6ded7dd89efe36f60a1556623ebf2dd0e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAF71482049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680d3eda58e3b3f51b9c160acd869fe481eb001d7c1776825ec683fb531726c4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEAF71482050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab30c60b5098d659e96d8ccfa643eaca146cf1971cce388f24b37e21087921a. 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/DEAF71482051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73c3b3f4f600fc02d488e4f3573d16d661ebe1cc5d6d178bbc0170a24b71f68. 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/PLA391605402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0ed44aa930145a4216d9b1d8cd50a68ac078018ee6b2fec4921e002f77145. 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/PLA391605408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ea7ddacbc90923966b8c56e19d66111e38566cc9c281d4cc4dc4605184f087. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLA391605409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c95d3267b591139bd1f77dd77028dfc89d2f87371fb633ef1c9b1c2f98262af. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLA391605410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ce1fecf651e464215222bd006d2e21a69e8d34fc57fdbb783e16c608948a3. 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/PLM182010027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ae60f23735d94f4aa7754293de3f62141d41e68aa1a0c047f89872f2abc7cc. 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/FRX762373930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117d847ed158131238c3733b68de1663ec99002f93601671b42d0b14e3f97756. 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/PL13O2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb316751429af65cdec9d813eceb273a169ef83508e884e394868a3f7e6e35e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLA812000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18723422a128bea757867f49aad6dc0dd753ccd88312ce674236d26b7bd4a94. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLC062009313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e69088e01342459ed3c3bc1110bbe18d77683a840c33511a7f5cd37ed15e5. 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/PLC592000111.