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 0x9bd3cf22500d1c466cd3f7301038cd9b879f12aa4b66de40b18b189bd4a55a99. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0600e35a-7e5a-43ba-a680-77f26adc0d34.json and https://artists.proofprofile.net/proofs/artist/0600e35a-7e5a-43ba-a680-77f26adc0d34.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 0xcca0299cfff08e8f019ec6259e07f87b86fd96ddbeb32d69c6d342d6e4f95271. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWS2012549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bacad6fc96576f0744e0e5b2226692a17e4b823bbf9a9f4e025356d1c39f80. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWS2012550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19962093f0df7903295084aff0b2524f47373172b759f2e003be5192bce5b3b0. 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/QZNWS2012553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3743788e9bb4a083c6b6a60225673e7a360bff1dd182526b426a88c83aa77. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:39Z), 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/QZTB32340514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df462fed31f15b483fca6804b11df533738ff8780a3b9f333babc1616ecd2c1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:03Z), 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/QZTB32340519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2702ffd39b05129a611b637eafdf7362c12e94ca22e14e734320cd32a5894c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB32340520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e562b357b86da996031c477dfe31040c05a0fdbf1f416c9cb204aca829d4b. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZNWS2012234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9482126a785555e7a0b82e954f6347602c018546f43e298a6bf7861fe6501. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWS2012235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a74875ec58a6e1b85ac9dded968c63d9bc4244fbb630d8c29b414342ec61a4. 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/QZNWS2012237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b665fbc3ee1e8c2d1f1de1429d4ee95dee18282d7f77730ce99cf210253ee2f. 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/QZNWS2012239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1078cbbfe1970eff17c445655a3edb6a86bf0e1e265bb42a49dd7ae8681dcc50. 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/QZNWS2012240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be2de6856cbc59d4f66fcb7df24f653faf4722c09ef0d41e51ef2b3990daba9. 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/QZNWS2012376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe07a85d8f0dba9bfe8d7a973c58459971967d13ae2640daab0f554d0218cf5. 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/QZNWS2012380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93618b2d4a2d7150ac5affa38c56dd653380bb6bf095a5656f65cb36e8ded95. 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/QZNWT2022635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dce80b58b236fcb4ac19e299d90905975c7be7fc57099d70efb8a66c4c3573. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNWS2033981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853f32930a6b48085a99d542f4b4d403e2bebfe0aac2b3e752629ce60c231a56. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWS2033983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3fd5403b0718cb1e2cb109d4b1f15b9ebc14675101c866097573328eea169. 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/QZNWS2033987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ec306a21c2b15024348a4a16aac1901e57a219e6a08a6a3b6e239c0520d884. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWS2033988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae07fe52be7739b73bd4718035f5691ea055ee84dd7cadfcae52802391ba7501. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:46Z), 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/QZNWS2033989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1585f6ddc1e173de356b374551d023acca0cb1937583d5f268a371f4a367d65a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZNWS2034985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0611702c0e27693c1b5e21137160ed10255f55befa3030b177f10d073ebfdd. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWS2034988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898013b8d36419041ebf18f4f6b29a19ff556b871e4c90a8231e2ae223a5ae2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNWS2034989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8099e0ce4f55190a7c6819312f4c8e0d87c7674d890911d26288efaef7c70af. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWS2034990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc504006a2af0c80446e1d3e7743259abdb030320d3e968ee2ef4511e41bf9807. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZNWS2043003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cc57a57d581f76b57c163e1add5fa1a4d55906e53b36e08165d973b559939c. 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/QZNWS2012089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00907ad582f43938dc27257bede7938f442b86947fffad87b20748176de7e7a1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWS2012097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba6ecc9f4f48779339c784c3ebd554e7292dc64537707366d4794bea3a96eaf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:11:16Z), 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/QZNWS2012098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170d48a6a715eb82192a75e1c13fd1f97101f4b3e155507237c0ddf149e3388c. 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/QZWFS2408817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64c1a732d3fc0c568ef7e5a1f71c316d14f88337b0cc31d64e22a469d3acdf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:17Z), 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/QZWFS2408821.