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 0x2320bc3e527b877339683a9a6b34a0411a737f62ffc3e0e7facfeae588d71f63. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f789c224-0a11-4849-a519-3cf2926da15f.json and https://artists.proofprofile.net/proofs/artist/f789c224-0a11-4849-a519-3cf2926da15f.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 0xb35572be79b2437c139450882ba6f5a290639ae8e2f419af48181833ea652062. 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/TWAN71271259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf532ef27a4c80b0245a889032035a65167c8f3bcfa9f331b999161a5863aa911. 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/TWAN71271262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00942f14f6dba32a674d2b7905c5cd42a44491d9ef2c6f30bf03aa674478601a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TWAN71271264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de3c643db5169eec3fd9e03fda3674d50ea60f4b5586c1eefd1036e953bbfb5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:40:04Z), 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/TWAN71271266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e04bb0e90aaa1e3dba4d4b1e28de5d5dd3dff52671f16d80eb78171a0fcc9b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:24Z), 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/TWAN71271267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96e3e3657af74145806cec110c920e38fc6e017fab0feaeda21cb1ae3a0c7c8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TWAN71271268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb6e5fcfe1f9c0fca6cf404a5a352588a4462284a38c7c3a9395fc2eb1f4af. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:52:44Z), 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/TWAN71271269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d642633bc7155d5c77f4892dbc4a6e2bcfb27e52a28c163f3a1b5534ca559. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TWAN71271272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688cb72b1079349daff6cd1c5ebf0a8410843111891ba00e4a4ba70faa020ee5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWAN71271274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cfb9db8188e0d8953fc16bf7676c770c42f67e9c7b3983c19470288aae0f78. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TWAN71271243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b35c5ce4ce5e09e481402a2b3552f608b5433bb7c59fd85ddcd6dad66af6bc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TWAN71271248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a22df3e121e491ea1e4baef094cf72ab6fb5dea83023d0f6191c658169d273. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TWAN71271249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a8c6ed8c43387ebf6fbd601396d2867c0f597e8997c6788a87486ee667f030. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TWAN71271250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf5957cc20b52f4c174cb15bd9e7515092bff099293f6e12ccb268d9fe03012. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TWAN71271252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b7d3805ee34835a49eb8e7bf756668c339d2704f55b260fbe51c92f86f2eb9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:50Z), 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/TWAN71271253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f91ae1a8774b1caf48930aa3b59ca7c4611f71559f1c12ce4077b8333a6f0c7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TWAN71271255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789f2db1e107f70428657085863213ce1a5d4ff73adf130a899a9cdb1e4c77b8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TWAN71271277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a134b48051f22f1c938bd0e74f5f4cf037d79e4c9cb3a779dc037d131002419. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TWAN71271278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279430b582ede7097a579eb31082b9539f1d813ae62c6c5bf6dba2df5332d88a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TWAN71271279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7ac235c5b8268803755fdd89a7a658a95d131882e4a086b5c0d7cf764c86a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWAN71271280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ea0d6599e987d342039f4cf7efc5bee543012ac7f06a9a3870b6a49c7322ac. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TWAN71271282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eb4916e8801db836417ab9fe4c385299d8278ae9a910682a752d8fc04adb8d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:08:49Z), 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/TWAN71271285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce922e7a3f3f4fcaed6eaf28de6010704016b9e019a31a7260ed2ed3ebcf69. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:18Z), 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/TWAN71271287.