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 0x6e4119a11a348a4b37bfd4710ecf06cd6392058cdd8587f0e777d1076d1c4f75. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ffbac93-8eda-4fcf-bd4e-0f0f1d6a0ba3.json and https://artists.proofprofile.net/proofs/artist/6ffbac93-8eda-4fcf-bd4e-0f0f1d6a0ba3.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 0x8c96994b26e6f1e4be64ce751ffd885f33ea3e080368a534d92085bdbd2f7ea5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:45:51Z), 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/FI9PF2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d458c84d5f8068589d03ba9c6c40edd5dc28303450a4400c0e2093bcb426cc. 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/FI9PF2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c86a1fc4e4fca575ea20d0c80e2116dae7847b4b42db801a89a2925f88d1db. 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/FI9PF2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f62ca16cf3cc6cdce16a0b3b0c62aa9f6aee4c1602f3615b0c718fc45c0fe2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI9PF2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba66adea534cc3c014255a6e7adb12b3dfd6ca13b9ec0e19378d485095ac73. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FI9PF2300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff909fd7b0eb6f0d9f26c742dcfd256424d2b13472a965d6624c9ed898763b07. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:21Z), 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/FI9PF2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f58ab9cc482d06c7142c85bf9eecef16ba2eb2b5d59fe79bb8cb45b287f4f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEZ651709218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e8f893a5b4940c682bd190102fe6f5c697925c162f1369c4a6ec9a1be8f75. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZ651607325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e4351e723a361083400cc718b93f19b63d9a76632b57f635ae91aaa1933c33. 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/DEZ651607327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdff3d0a2335aada851916cbaa2dcaf4e410c5bb481d31dae8878b2e6525937b. 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/DEZ651607328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb5ef35064cd85cacb2dda4be7547a4fee10d7c61523de5bcb0028fae20504b. 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/DEZ651607329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f083cbfd0720f37da0e2151278ef4ab6489297ee9d6fa2f0e4608178a4efbb1. 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/DEZ651607330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb24dc543c35f3ac19d35131529a40b65bc021e65e635547259ece598a4cfa4. 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/DEZ651607332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdeeda71f9ddf819aaf9d9cd13e38f874dc0142f6f39d5248819b5e6755ac85. 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/DEZ651372936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c119c9e566aec6babfac8f5ffb9ffa4e0e7c75aa3159f2c8957b97d19bcbd94. 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/DEZ651372939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dbef4429a30a9ff818918537ad59055ff8a006198f1bdcae36bc498409724e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:26:27Z), 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/DEZ651372941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f62ca16cf3cc6cdce16a0b3b0c62aa9f6aee4c1602f3615b0c718fc45c0fe2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FI9PF2300091.