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 0x6df912ff81bf991d2a9d0444847ce971c95cf0ff1b539ecc8ea02b66ee3d3a13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcd4f57d-743c-4157-92c5-16d28258abac.json and https://artists.proofprofile.net/proofs/artist/dcd4f57d-743c-4157-92c5-16d28258abac.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 0xff04adb2f0ed4a8a2ec13f7e64f41a49b82c11bd7e328b6f339e59a5468e500d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM81691232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a52ab21b4e65574bbfb48308fece0dd54a0afd404bdc683dc84137f8b4cc9b9. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:54:45Z), 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/QZFYX2061698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae98e84b1c483fd6efebea7ef848a1d3b12e3792883e7069f5f17220d99f3886. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEP2037133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd071c3e47d636045a0472a7a7693dacee6e15ce30bd95be5b7b03df772f729. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYZ2195671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3eb9b5afcb5e5420f84eac4cb3824c0cdee3d3d3e0bc8af4522f85529d9b5d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA42177021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ca544a3b5168ea1952af13c80a54c42b8ef1386ea8916d8f08120fb176265f. 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/QZES52101518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe4fa3c9307812ce4d3a23d7ded07ae84f24b36b71e2bee408677654411e1a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6N2160633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1235e7d181b7338e70d7c2e5d336afcb5b90a23fca78253d894fce73c072c14. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:30:49Z), 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/QZFYY2210017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb045236fdfa4020a33a1f4cffd6e9061e7f2bea3d6203e33c56c0583826ecd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:37Z), 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/QZES72232845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597d7f942ab2bb0cbd4ddd6142741a3d677527bd779e64473164b3e55824aed1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTAT2252046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8709574648e71b4e1a4a634f2decb93032bb839e35c51a06db04fa3dcfb30fe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAT2252047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83c1d37fb048f22ddcd71d796d1210f0c431cc2b2f2a4d003fbe49cd9cbda36. 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/QZHN82378632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad66af725ed4d9ea19f540f61811c8100be343ee50efc540aeda4823e87c160. 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/QZK6K2329853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dbe05cd56ab26e7a608b5e637a5aeef144f38bad31eb940e570aa5b32963f8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6K2329855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e058c82ee5f921d0fdaf39fbef58ab1206047bba006ece1744ab9e17853cb5. 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/QZNWQ2395661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5445bdda8b0ad4db286650c9192d50ad68ce4348d7d8572235f62c25ae2959f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2365707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d97adf58b3d618286c927668c6a8180a235ade7a889016466423136c35b0c8. 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/QZHN42414276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017f9146e57b179cd290364024bef6b5bfd936f8d7c58449d762a5186556d8e0. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTB32538815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bf62771afbb6cdab65c746f717e3ea294482b329b0ce749136ea3985349c75. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7R2515490.