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 0x5aa82689d9f02b625cbfa3fb6f2db5377941f2248608b7a532e7cf1e51897382. 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/f469e136-7cbb-4df1-9c1e-04e13ccbfb03.json and https://artists.proofprofile.net/proofs/artist/f469e136-7cbb-4df1-9c1e-04e13ccbfb03.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 0xac3f759cde1c598b1633fa61e2d89e41abdd012cb95e7eea940d9268d56021ed. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:49:44Z), 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/USACX1401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e6331492651c76d2f939f6fb0985d8716cc6efe66386e66be7eb15d2faecd0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USACX1401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c5bbb06e305933791daf08a11bae8c2dc6a4e157fb2fff23bad75ba4b1fd26. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:40:02Z), 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/USACX1400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef687981514eb194c575d1d2d411723fc0953bb9685c31d08edbc360ae21ad3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USACX1401365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab2e1435916926f959c9d8d67760b51dd18580fb640cd01d4e5951024b3eaf. 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/USACX1401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9328dfa0517f193bbfc334ed7a5ff2eefc56e10033cbc462834072d3be71661f. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:53:49Z), 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/USACX1401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f700afe0167570e7193cc423bbfe8bb0bfd25efc02bab553076ed2afe40ac9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:58Z), 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/USACX1401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e8e1bdae16a0a59b0e6424986c788b994e68cf687da65b320e6c1dd571c377. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USACX1401340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f2e085a15dc3a7b893c835bb3e82563bb101543411730e1905c99c887dca8a. 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/USACX1401341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a52704dc02ed5c3fc1b4ed39ab60f41107d09a5efe40a27ee83be100d96b36. 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/USACX1401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78272768e3eb25915c855b4f580ed70a9c114da03cb30261718d59b68e04d926. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:34:45Z), 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/USACX1401254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498cb1d27d3160b77dc61b60b36c67d2fe6af0d6fbf92bceec78408ee66867e7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:28:07Z), 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/USACX1401256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb230069bb5c68b0fda7e38a08c0b640945d868503a3fd71849be317389c5a842. 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/USACX1401259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bfd88c167f2927133290e0cf74e9a2124650414392d700e49509566949dc0d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USACX1401260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a8a00e8ec22732d549f0cd28cf079caa2c41147f6c667a10877f6fed06d4d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:48:45Z), 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/USACX1401263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fad4bf3119fee53719e6a6d518ce0f1c1bfa605fe6a338adeb7b48ba455ab5. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USACX1401264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8805a4031a7ce5cc7dff3bb8d36e91f336d4745dceaf27706b8288aff48b776. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:28:52Z), 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/USACX1401267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02be6b20ada73ad3a3a666309f8dc5530324ae2904e875fa50cbc308f5b29a3. 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/USACX1401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38377425d10947b1a211152528dc0f0ee33237d681b58df2e404f82b01fe94. 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/USACX1401270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1933006f59e88a85eaa892453e78c4ba8da002bbaaca119eeb3359a02d139d2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:09:18Z), 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/USACX1401271.