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 0x7a427c824fb512e8ba1e1e855cc00a43c4ef90e4f66e4e6db034df8d7c7d0a75. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe8cfc11-fb83-41e9-8a73-bf3c3a8dafca.json and https://artists.proofprofile.net/proofs/artist/fe8cfc11-fb83-41e9-8a73-bf3c3a8dafca.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 0x7e888527f39f55af6b94148959081eb095f5ef409a338d9d070df25758e6a5b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6L2243310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02656ce30e1c41b007edda3684778691dd524c3b234bc12c222f93aa22f4b87c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6L2243313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b16cfffdb61a123551afe278442b73a4413745b21caf66f1961f972d86cb9. 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/QZK6L2243314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a83dce7c9f738be949f3220af75c20cce980b83cb69752fce5ed2203102bc1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6L2243317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ba9bc08c4ce6419392905c9ed64d140d020076e92d315c9367f1999fb9ace1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ42261294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf3e21c25aa72a7ae577f2ce24ed6c9927114bf45ebe24f22f3ea669053eaf6. 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/QZFZ32279383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d9eaed7fc597c016b2f30b31a49f8de12bb16b0ae3a6becbb70940e8f82939. 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/QZFZ32279384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8aac2b60290d79879b5202be6773fc2e20405ad36a86c4f23b052808e40dfd. 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/QZFZ32279385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9cdcb9963b62e9e144641c7b77ad01d0cf33d18cafa7cb5b9e0cf3d229dc5. 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/QZFZ32279388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e78e8e5729cafde8224f992d8b7e7e2eb2b72ba4c0fe15f360470ec0cb0fe. 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/QZFZ32279389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a84a9685cd3cb671404d9531d6a6e7334a85c4c9c9031b94ce763381e4447f. 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/QZMEM2153225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e91b7f3bebe7dd7bdbefcbff5eda7db15e0e1df002607aee569c652d5415d0d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFZ32279387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076a6164863d834d146b88be5e26d99d512e671bddf52cb916af52419400e727. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZFZ32279390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4151dc0481c0bfd806c0f182c8cb8e350dd124d56e984a1a91ac5b64065437. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ32279391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeae5e7eb728a346f5cc1c474183a131421d89b6fc335349db3159de8f63c6e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAGO2235367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bcb6071522843f5d8655b1fdafc6985658b2958205372ad033dedc784f9e37. 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/QMGR32230688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d2b3aaa3189eb9480dfe6c04b1b7c513dbbef1ebf1b4429976169fda79b07. 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/QMGR32136753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f23a2bb58437e64b7a28e7f22553aaac26a6157a320ed7fb2482172ac11a37. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52116735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7e2fd3cdebc0e011d381774ff29d6c9496eadab043b637a9aa4accab65be4. 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/QZDA62148816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeb1fea6778484b2562497d815fc32355b9770fa2d5e0317b8f852b96e1eb93. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:36:12Z), 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/QZHN52116736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4225185ee6155864923d7c38c22352442f1134467e6924b6844a1218f518a1. 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/QZHN52116738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768b0a378254bf57142beca536b5b05bfb1242103b635a35700f74a3a3f89955. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN52116743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356c11014cf0f0a1973d9b2c54d234fbef472811aaca4294bf52abe76e201692. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52116748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc422cdffb6018bebbb403ab213c64b4f1c4afd277bb1d3751a1c8e4c52afe817. 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/QZHN52116750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d8f4c114383eb51d8723ba5f9c4e991cb956513ecc20670e10bd9fffcd1814. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHN52116745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6e01cbc2e211b2b31ae0fc92f33386736676cb145472ba188c3facb46680e. 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/QZHN52100795.