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 0xb1e018399475a84a1a33b79dbf3922981ab3571b7eda7ef2083844044c1bea01. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dde290a7-3108-4a95-bf39-de2540e05b31.json and https://artists.proofprofile.net/proofs/artist/dde290a7-3108-4a95-bf39-de2540e05b31.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 0xbd6425443be2aa3bd47c6b4767d9810cd837e36928b2677f253c85e476c44609. 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/QZTB42233219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7664cbe5689daa2f01952b5daa58d3a4b1946549097d00ce9e04a27131f0702. 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/QZTB42233220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720f7fb6551d4191796814aefe651dc452ee616dd56ed8a039b35374fdd52c36. 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/QZTB42233221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92b49835475237bc308ac5d691f455360f6d0f6d52bcdd188d3e222a3b5cba. 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/QZTB42233222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d9f19861f7f82f81db57326697779d18fe6bd08d3ecf585420cb729cb77b1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB42233223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f7a7507cdc8d5a8cada4b42a421da1091af456084f7fe44b26e9403237ffb4. 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/QZTB42233224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6d94859dfcf4d3c3d6bbb4ba870dc7544b2f55e33b1e8655f5afcfb0e0cc8. 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/QZTB42233225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa508f303980e7cdb4d8e158a9bb5d1ea80c7693380e037e4915b35c8dcd18a7a. 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/QZTB42233226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2196c2bbdd678f2787d76feaaad752208719750480aeb600136ea8babad8cc. 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/QZTB42233227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b52186b0d89ba95e46ce937ee65a18d21b4c5d7ee4e1a3822437b2aab49d91. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB42233228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6269e61f968ae615d5c8e7859b9cc5b1bd8caf312d81bfbd54f42535ff55f842. 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/QZTB42233229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7875f38b51e506f30f71e40f1148aaec8b8f1fc290c618d2fb355958f362a1. 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/QZTB42233230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99157c64db93b107f9194ed90093bee400f00cce2b48cbcad9c1956b12acccb. 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/QZTB42233231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd862bb5c32abe87f691d04f705763f156557a341c2daf1a1ef0022873c2181a2. 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/QZTB42233232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f412f48252ae874c8ea21341a3af8f26db815655a0058270bb337be353a0a6c. 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/QZTB42233233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca1a800bf7f65432960b778d5a655d9ad19bd3d0729cc04572e058932a74f24. 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/QZTB42233234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4fcc131e06ffdd3b7584d927dbfc80a56d0cd7e9a1b97c09672baf22b78ad8. 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/QZTB42233235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d42335a0d992ff7800663d8cb4df342cc3b1977b7e34ca9c67b849fbaaf91. 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/QZTB42233236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21560742391bdd6261c7f08d20383824110e7c67fd54ed8861a15721475a2255. 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/QZTB42233237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc843c441c2f60c1355f0aec3bdf6075cbe72192719f15d93f781ccb70d55f. 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/QZTB42233238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d66754af743bd0686f6bd10d2542ee9e68f71850b22f63bffcd92db13199b0. 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/QZTB42233239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ffe87340c4fe0d5f3dc667436e0864926c952afb62f282bcdc53ae520b4de1. 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/QZNWR2169367.