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 0x84323ecd5aea2fcdd0b2c16d5af72fe7b9346c36d3c1f620d23519d1e7d5fbeb. 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/e6625ca8-4269-4d77-84db-d423202365e5.json and https://artists.proofprofile.net/proofs/artist/e6625ca8-4269-4d77-84db-d423202365e5.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 0xf01a0d00b571372ea442a4c3bc6f0e219d527bd2b3d7007a7deb9fb1f1d7c61a. 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/QZMEN2458283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb09f8957ac15e388142a69dc9b61f11549b721f1b78687f4a5ea438c510febc. 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/QZMEN2458284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e589baab85761ff7d0b9a9df361bafc353938ea3344e73adf7b77c5fdad115c. 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/QZMEN2458285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b110cd79a7e593694d24f123ca7a1a71271cb49aac1b7187e3fc047c4ba0cb. 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/QZMEN2458286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67d06755ed83e8d02f4a01046e4d1f10224008f0e652a57924e2987c9e3118d. 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/QZMEN2458287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41550a099a6a6d3c3dd1c4c3ee028c53ef970bccb5eb43981f65bd1bbc792c95. 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/QZMEN2458288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520122c2db9c26a4dd41383ed672bbc4cd8d8856f604cd62a92fc14efd9c6798. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZMEN2458290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd890d181c28134bc7722170a6f1278fb050fedae20ce756e0055a79925dde55. 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/QZMEN2458291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9074b0253941f00efc6e40dd903e3f76170bc841e7c155dfbb3a82a6ba596c. 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/QZMEN2458293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755ae95d3c66e9db24ff39ff6afbee97d06ac7570df8d0e759a71b7859987691. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMEN2458294.
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 0x36971693b1775682deff24a138f6c203c5f0df3948874d136f8952f9c84680b3. 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/QZTAY2336918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127adb9e5a13e7e2cc40d7ee8c47dbb724df2002cb1ae4f39308ab9da3cc9e57. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:17:30Z), 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/QZFZ32334188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae13fdfc61bcd44df3beb2cae5792af1276682d3752b76256bc4f18558edcd. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTAY2336913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee757c35b46dee6ec2eee98a2ed472fa6d3ebf6ae6e983cae568f0a2f49dd1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTAY2336915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb931d78765f400ae39800465b0ba1e9bab43a95e6d06b6b0ac1baf1f07c4f236. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTAY2336916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa267b266a7b87a61d1bdfd9a8ea142cf6da92f5655bfbbb43989937f962280. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTAY2336917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae0198ac0a3f68e35567f41051584aa0c148330dddb87335888cadfc66b5d6. 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/QZTAS2147538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe7401de00e8251f8059d4ed55b39a5e9206ccacb2d338ad5e28c9f46f4629. 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/TCAFI2016908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f255bb21e1f4d1bf5a7fb14b4742cf68badf1825013b04622b9465d5c0c89e. 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/QZMEN2488582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fbdd4b954448724d7b6d647bd5114b3500266cead4ae2f9fca6a64e3b953a8. 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/QZNWT2462039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cb7219282bd285f476d9d9381a547ff216499e3f47b6d78f93c0cae9686d9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN82499811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f892a6c00de10749bdd68f33200ddf5154f4e69e9f4573e60c8b8e6b01316a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZTBC2395254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a86110f14f617be48e41fcbbb81b9d2c50a4b19de70969e73b9e53b30b25b9d. 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/QZTB42380620.