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 0x1b2f20016fce61f8605f7b85cb33c4307fb00ed0b96bae575dc99cdc40aeb445. 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/37183609-f9bd-4945-b11c-18ae3ce44415.json and https://artists.proofprofile.net/proofs/artist/37183609-f9bd-4945-b11c-18ae3ce44415.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 0xc6d23f0a882dc0c214e08a188ab4adfe331a7ccfba180c48fa2765b7c2b4a2c7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:20Z), 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/ES71G1815224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb880b3961c52d8753d28cf91dca1b304a4cf463a2d3f9b2f91c84f7846f0f7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMDA72555178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7654cebf02ef5d668afad92344af2d99ecfb20d3009f2dd356ff838de6b8f822. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:16Z), 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/QMDA72555179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc54690923a1b5f71c7f492c4d5e292a4cc6a525e62e75ba4628d905a03af63f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES71G1815226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cdd12c21418f2162ae550e9193ffcb5970d92c09b1b2daca29c84869867e8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92374057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf12e3f067faf71a51d5cb256e4a8403c902481669654f26b76ac8f24a7a146. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMZ92374059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c805338cf853564f05878e87264cacbf57362a16057d13509792cfe26300def. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMZ92374066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a17d105dea8191cf03381dec54c36ec157b540f171cf8e861b9c54be40f38. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMZ92374068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb7486ab40cd31616f40191020894e3df52c71bdf61b5bd6d636035aa2c7616. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92374070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c1085ba66d7b3be347d60e63903b46c24dca370a97ba2bb69b9603da21b1c5. 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/QZMZ92374071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c9e9924652e45a8dfa8148944817bd1ec1814a397c5b016cf865a7a5a74ed9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMZ92374072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37ad0c0186a0e2e2d25292dafe50bd790aba4eef993141963974af28e860190. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92374073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9333d2365510cd84a6ac34f36b0147ff8c7d65f0e9950f9b8483c026f3a7faaf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:08:13Z), 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/QZMZ92374074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d616093b8e428601282a4fa523260e72e1e9f0834711c11b9f63aa4e927fa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92374075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829cfc6156a08c22246f03354dc1cea8b933a5eea0434b1d5ebf6ab6349b9099. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92374076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74014813d5a33164bfcd2dc3ab2db45126d7087d95395b484b8a25cdea02df3b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:38:34Z), 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/QZMZ92374077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd565200c79dde28f8869ef562f3887ce9a8d2d3dc5d40852b5dd1948be76c86. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:52Z), 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/QZMZ92374078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc940a27f727d77a3c43309e865da351f6fddb57440d933d5969659294580e0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:59Z), 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/QZMZ92374080.