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 0xd151f2a897194dc48afbb595523e6b429f1e318892bdaa94b7ab3eaa4aac5529. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2744cf18-a944-48ec-ba33-1c904a39ae88.json and https://artists.proofprofile.net/proofs/artist/2744cf18-a944-48ec-ba33-1c904a39ae88.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 0x752643e85430dd4cea8989c822e567b26d74263644860e7dc4db8694678f1370. 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/QZAPG1863659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f94db570a35dcdb1364adcb040748af31d6e5756a819db727300f01dc4a6ef. 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/QZAPG1863660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e9b676b7129f909a78d8e2631b47f132128fb609764f93ee5e01e1f83d010. 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/QZAPG1863661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85185d74fc12792b6a29b63e58c80cdf13f85b281f95643d488fe7de92a84ed. 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/QZAPG1863662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47648c98d2ff1373ebe138d586b95b5329e82a10737e125ce9a63d7ff9ecac24. 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/QZAPG1863663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d853b2eeaae2cde8ec8e0b9d94dfe3a6468430072f72c3c64ce23d2340cda0. 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/QZAPG1863664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f185b2ba71c68aaefb616e29f29a824afb352e378829939e433df56bdf5d7ad. 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/QZAPG1863665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e64b7d07ab54118cc4359a1c68121d3103a6ec6c236c013f297193f2885df4. 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/QZAPG1863666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b676c77b6f18aa01503f39eeb1fcb99f1b6659b2adfd4daff1fbfc2e94872f. 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/QZAPG1863668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487b71cbf9c28bd85edca8948e8aec79efd16a712ae2f944d2491bfcfd8705d. 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/QZAPG1863669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc83426fab6898105cd200dd419628c6604331b36723621d1d5a33dbf5eca71. 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/QZAPG1863670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e142922288b7b44d695e3abf296ce5dec729cb27658f01b3dc189593bc2bda. 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/QZAPG1863671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb952a3bfd13aa5978a02054a262fa43721ca51c95a1d842e98ffa29fa066ebbc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZAPG1863667.
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 0x60d4afc7061b14a9a22d94a591657fc831bd23bdda64782b89ac18fdedeebebd. 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/QZANL1744091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e6763b90987acc1cf9a86032b3a0b98c444df209e05ca9f309ea34704fbe17. 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/QZANL1744092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c707369a6db2902e052c83e6fe941c03ddb652ea49bf085281cc21981eae5. 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/QZANL1744096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d43741ff9e7910cbc823c5a8a21cacbeda007d19d6d9f488d58ebefab9a68. 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/QZANL1744098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a95bd2fb35ab264c468627428e8d49bee9ed023c5f2eb2db651d9a6ac31c31a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:03Z), 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/QZANL1744099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f66ff1b3911c9e0e827a04a2706549b891f207f3d62a097811e3d66dc59975. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZANL1744093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c7f41960b3591f40f448cb00a6c06dae39e2541ed59e83317ff90b53575ec. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZANL1744094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f7734ae893adf40c2b303d1b595d0324d7784568fa6829942e35c72229ff78. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZANL1744095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b80340b14fbc9b9a802ae978ffd2b4788f9fe93b87d673cd6251ebc9751b48. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZANL1744097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac38bbaeb607d68842fd0a6d396a192c8e32afe81d0f60ef244f6c25ca51f6da. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZANL1744100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546de6b596c6148ce1320f08a0c4c0b1a9cd691c26c450eadda61cfded131c41. 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/QZDA82325319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768fd8f1e7b5ac7c41b6e4195a13b1663b49981fdf44660886a7b3d1560b94a4. 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/QZDA82325320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19d39dd09e0496775c42e99ad8e4d96802bdd1af165b9bc2fc8dac654b5e964. 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/QZDA82325321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee61e762d33505cb0241778bfa1125a7fe7a996f2fe910e81fdd18b12f09451. 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/QZDA82325322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c7e69da456a729e21dea194a001c9cf2f549dd46d0de4769dcabdb7f0f751. 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/QZDA82325326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd615b7c75235a90ed72f4eb76e6c59de6e357d0685bd1954a82550a41e07d8b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA82325327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaef1028602fde09512f26b98ced5c044809ed06c65e9bf97436ebc17600437. 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/QZDA82325328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a315942ae6e15cbfbe444abc56fab2734faff9fde53ce3495228525fc29a9e. 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/QZDA82325329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb66b2706deb9ab5f63d290d8c89f65b511d587e3fd3487e89677029a64482f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZDA82325318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ad93f39f89629d5e2503566d6356eb91b4017c18b9605450752d6bb6cce52. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZDA82325323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d707d087845ff6cf80a6c3e6ecbb3260946b4613d35e1464c3ea8eaa4f2e6. 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/QZDA82325324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d0b13cc996baea7ebc8e4d21729b0c3382505a1c842ba71d033e223c332cdd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDA82325325.