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 0x847e57f3a4e671348bf108790d7183609eacd849274cfcd74776282e973128a9. 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/9b747669-60e1-44fd-9ba0-9cb02ec13e78.json and https://artists.proofprofile.net/proofs/artist/9b747669-60e1-44fd-9ba0-9cb02ec13e78.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 0x91ba907c4bab126e0393872c01a8613da3b1a760f68922806a2a17f7187a6d35. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZMEN2074525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34fddbd54f76bee74d13fed00fd5b0fb9635c15546a94942b5f334d5ed5f0d6. 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/QZK6H2165717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444dbd16a2694c6d4f72463c5052a84fe192e254f85770fe5e26f97caa26b987. 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/QZES62299397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52497622cf6b33bc70e04860f55a20875e35f12fffec5877e582a70799204fe0. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZFZ22328262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9696b94e9e35db1ac4fef3a7a45bb155ab52e1d4caa80a0df39e08b6647e01. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:36Z), 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/QZFZ22328263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc809da169e7dee3b321038dc90b91304ec48775d9c682fdbbcb9efbd5a479. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTBA2322275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c768d857910d33cb3fd978b70556de65cc670877665c8c9697bbe0c492324a6. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZTBA2365268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0755153dc4535e63a1ad4c445b6888f4d9a60afdc802f9449cb3ad9b17a1f53. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBA2322277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2763bb216c31084265bba89050d0c0eb2b0aadace055884b779acbfeda58295. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHN32403651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5685e27f01447824714abd72ce8a3a20b6426b7bb833be5f343370af8ee0add. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6K2492375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4dd5f9d50b0cfc96bdf6ae24b2d28d9b29d423eefd2a245cd095e19ad948f5. 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/QZK6F2565633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6763d7b51631b1aa0877197c6c68c54b55bc0c992b8624f958bed1bc2edf21da. 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/QZK6F2565634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe1139dfb0255fe44f3506364d8211d0eaa5d090ace0d964f72a1ef717c764d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6F2565635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737eb5d8aaf0416b4ed1e6764bffae7cbef16802b6b538eef2cf5b8fa5a29169. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6F2565636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac39c886f6ec7b95ff7d29a21e52b900feab0755e0d411e3769d31658f04cd. 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/QZK6F2565637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0814f8233be34088f924cd8ca7db4139525d41b2d46b0eca8f22aecf29fdcd0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:50:35Z), 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/QZK6F2565639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ff04749337260a02ec80c764ec6a99c3728238b731d1514c695602f04f2c5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6F2565640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22faf79385b5a6bcae7d34cde97776bc686d19e41ce21437d8264f691168d597. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6F2565641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab5660ce0248cca3a30f73d1c9df8920f6daa26922e37a7886c5119fb1658c9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:11:46Z), 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/QZK6F2565642.