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 0x404d21ee9bdcbe63aea40a215ff5d8b319ef77cdb9bd6e7955250e2c813010be. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d68b9d2-2e3c-4756-a6de-a89fc3c52762.json and https://artists.proofprofile.net/proofs/artist/2d68b9d2-2e3c-4756-a6de-a89fc3c52762.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 0x92e5b7e6d88bc4d921b9e8b87a8f1ec82e81787050eb94330954de336eaca4af. 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/QZMEP2032701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e1c94be02a97a450c824399fcf14e65e4ba4818f6f3838402fed77af772d8a. 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/QZMEP2032702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76237b7c03ebc207aef0ec8bb3155661af861d902e35ae9ae475cb9c131f5afe. 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/QZMEP2032703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b468ea78eb2ed468b8564ddf53f1840215e81a15cce253c654c65f93087cd9. 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/QZMEP2032704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a1c9fde7e5ef9d671e59025a31f0c6203e5e5f4daa4f0cda68dc154b482d98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2032706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c02e1fbb38a31f768e785ffa2767948dd441721d9a0abd519f49a502f522118. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2032707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa742f8aa7800377729e765f54cfdc014f3ebb9d9d7984ad4f5f09bb5bfeceb67. 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/QZMEP2032708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f7c519628bf081364172bcacc5090735101cbe0f2f840fc7bfafc9ac1cb0c. 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/QZMEP2032709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b1b31867dc3260aae1c5709494b56c4f26b4ba169aa5d28b074f1ba0013911. 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/QZMEP2032710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3ae27b9c54f92a031ca51258e8f733d71a82123dbefd7b130d7f4e3290aec0. 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/USCGH2030730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f46fbdaa536ea702c75917e121fd7d65233a420a86345d499aad63d1ef28bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH2030733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7bd1b9ee56fe02e06c36e7e6414f13e2f452c134de63982f00596581f1e5a. 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/USCGH2030737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac72988350c1493f4ec1194b4d7618088c83fa8601359ef6e6b5307e3d8f0377. 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/USCGH2030738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe9259184fd1036043de9735fd4e594f868e7b07e86de7b84073872b9198c3. 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/USCGH2030729.
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 0x9efbdc115538d81a10b6bd151f5332ef3b00cdef6fbe24c0f55dcfd39069d924. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH2030731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c80506d82570625ae3f1dec2b359df4bc5343198e05e9dee7094958a917233b. 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/USCGH2030732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a46810286963388ba950af24f920fa222dba7adf5f1b206819ba7315771dbc. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USCGH2030734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58dfecb0878c0b70bc18df76a4ad5da34d915e54a10b26b3a26b21089a11606. 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/USCGH2030736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd66efae7acb7f8f7e837e83f58b64c03666f9d6fcf84e885728e9806644f5c9. 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/USHM92253209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8c2e00c2c38e7a687e839119c0a5a3b274d2bd853f90b8de59c07d0a9ce3a5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM92253204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e9e89083c6ce99c4a59fdacd3ac586c1699a4e8d8496a2ea690e99244cbdb9. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USHM92253206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e98e029061f364eec2dc155cef37430bccb3ae78abdc1cc61f485ba4a3abe67. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM92253207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0f13b09105108876887eed9e0d6d75191dfcc05f4db1e10dbd281764ea700c. 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/USHM92253208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957e920ea5c2faf14f1fc2005dfb61a31be8a1534d7148260077d268ceb6f5c5. 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/USHM82188294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e3543b7d989a0e3d223e402ad757228fd02068c814ea61d819b90933268314. 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/USHM82188296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9445d4244bf2cb2aee2f65daa56841e607985dda7b7f50b58ad2ce0daf65111. 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/USHM82188297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab53be7e867133c8a90da86319d0dcf2c0c36616595de8a541df3db5c7d1258. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USHM82188298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbc947969ff6f13196b9451070bc03a0cf0419687f93d3dd5db46f77d8012f8. 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/USCGH2190784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6c58f3eaa696b7cd5d7960d1cfb219eecac660c884f20ebf83741bb7a40675. 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/QZFZ32062207.