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 0x654b614a447f6b296e6df9c017b30d1a7caaffba78a82564caaadeaf8c1c9028. 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/122453ad-9b4f-4d7d-a019-a871df9f7ce3.json and https://artists.proofprofile.net/proofs/artist/122453ad-9b4f-4d7d-a019-a871df9f7ce3.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 0xba1abb2dfa7268f9feb0ada1d0837fe6ceb09de763f89a7c3497818364562fdb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN42238057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa035e735c14e45b447b7b20788f04c29e28bf7ddeb63c4216bb26d36fff0439c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:50:16Z), 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/QZK6J2249065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f9dc188dcd95b6061da781e940cd7ad119e4c71e299d47194ea495396e509d. 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/QZPLS2230046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d8b15308f07c78966816ae706a03c6580c802e0c0a836b127faa1b62cb2f60. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES72374821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a49db579c7fa6bf889e5775caf137625df5f0c6fd555bad53b0550217ef68b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USRC12301704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa567abcaef6b1b170a1048cfe5f0ddec1fdf35087faa4de4498ba2e202ba8af3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USRC12301717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a07020bb2eb55bd65d1318739b98e8de0e9be9284487acdecd06be7337f23cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USRC12301702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d4ae0ba444bf02a67810adc26adab8a8fe4cb157307ecb8c71a64602c9ac1f. 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/USRC12301705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0eaae4071d1e4b77221a66bd45b8f9a9dd39f4e236abbe7c1b2f9e0055d03d. 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/USRC12301959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15f52dff4be4071c794a9aab1cff1ee82de42919ff198dd08e1ed5ffba56563. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USRC12302326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb878d645c49f06910a4d397fa223ca485ce014a07cc422e75519c21ab04d5865. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USRC12302782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20055b285e0ebb5e61d0364a97d84a397bd26f3472e6f154de4059cc7a1bf6ff. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USRC12400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c3194cc1e89d817b976b88c48582bd9bf88a3266e9ab93b98b64ed0c2c297. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USRC12400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ded5cf496aba1f99f27c059a593b2fee40c25b779d36f9f153fac4e45509d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:13:56Z), 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/USRC12401013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912f00ecf3a973e02bd4ce7f6986d3db4d602e80d80632906247cd13f92d7f67. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USRC12400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0eaae4071d1e4b77221a66bd45b8f9a9dd39f4e236abbe7c1b2f9e0055d03d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:15:42Z), 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/USRC12301959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5420f2386dba30f1d5ec6871055a6039f75b0db62a37e43638958153d70e0870. 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/USRC12401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8dd6352110dc936641faee62d0f98c159b9ca866ae5a5d29881baac162c25b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USRC12402438.