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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322fe0f38299b96fd2e2c0c9a8a7255bd28ef9d7e31b0bc22cbd3c38c78ca514. 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/de0d364f-e568-480d-a487-f485ac12faf6.json and https://artists.proofprofile.net/proofs/artist/de0d364f-e568-480d-a487-f485ac12faf6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cf732fcf7bb5f67db71aa86dfe1e76c0c71b76c294a8b57bb898494e11318e. 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/QZWFX2529761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6ef64ce8a0c7d05d42d1fa94d9156a36e0bb4e19d622a7a88dc1d09bc03ec6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3FD2584190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7a346a5c13394db21ae7954a0f50dbce5a177f3b97ee9791109bf6e2533958. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FD2584177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf282698232f2f757569b9ff59e59027721d16648631cbea9a2c6da69a73b447f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3FD2584191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf75c686accdb737d5a79b0531ccdf1be19bbc3f6b31f8e2becc8d0878b404d. 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/QT3FD2584183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe239b87b133c8d02ea154a1b2602f7dc12a57d894cc3ba97612775c892d62eca. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FD2584199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbad7aea2d7a72c0163879780f6c9b917e80d38c68afc2f3883405103b3e026. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FD2584179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc207091325aab572f6e395474b1b8c6f661d795446371f628cf1b46d8806d52. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3FD2584174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b8f9d2a3045a2f5ced8f90d2d322db36922adf05d095cb5543db918df0ea3a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3FD2584236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4052843d11a50da48b2f356711f93bb9fbda1729fb1e05bbc8fe7af243312e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3FD2584307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a0565ee3be9cc85be068604b1c2a6c6acf09f671cc57c6f4c819dc4ebabf63. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FD2584237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c6a904e36b9e245c940be9b33fc7656bcc9dcb819b015f3bb2789101447625. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FD2584302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7bc4fd8cc287acff3c88c56f3e408c3e1ddab64237e3cea2dd52ff3497f98. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT3FD2584238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a74992f1e0b1188526d1a6b38903683a61eaefc4539029a9aec507cba06681. 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/QT3FE2543188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237800f2c5c5372d761f817be25d9cf54a3840bf0ec0307dbb8a7b302fcbd543. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FD2584226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2bbaf68fa00d40280e9f297591f8f90a7118b4a384aa5027a9dade97abd997. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3FF2530131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4612c42622b1cc175fa07523590629c308aee0c85d8f6dc9dafc5a12a70725. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa64d11e9d1edd1b108541616f7c0fbfd9177002a934ddca51088d0ad1979a4. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QT3FF2535723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca7a99e818b570b8433837a9aedaf1be2257a8d289626f99ae9ae27e744bce. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613819216ce62a28e846441fcb973599d5bb01462ddcd2cb981a5bd4f9be509f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa64d11e9d1edd1b108541616f7c0fbfd9177002a934ddca51088d0ad1979a4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814f954b99a95ae40c3066ab1315bdacd7b8ca46ebd7b30298fe580cb0a66f42. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FF2597424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3e63a73409d0a132ac36138604f71d21200aad13cfc7cdaa89fd792a7d335. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2529596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2409f2d86918c5981ed5dc69be2e55cd81af78e2d061db5048817a142bff1d41. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75298811fce62affca5e419eeb5504467f5e76885173d29a23d39873ee4c9c22. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82528cad26a74b1f373903e622f70c3aa34e84cf0bac635820448c21858494b3. 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/QT3FF2535806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf881e9d9613e57051ed5086375c41bbe7df0f8158cdce7ac6230517cd4d206. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadabed671c30d0754a698fff9b355780c123a62ec48849ba33c19a2dcec64b8b. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT3FF2530362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a211b4e59ac666986218d121fc9d30468f3fb0e9857d23900bb3681954ec9. 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/QT3FF2535789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e143f951024f0aab70df7eac8b9718cbb21ba5f6107e07b4dedefb0fc91f98. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3FF2535808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ada92963732e9f79a9002d35187a4ffd3aec3ad21df19c3eaf53a639e7fb88c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FF2535742.