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 0xe4d152da9d4eafa1fc05e3f2b106326352c0d493aefa184e7f8c8c4ad4cd8c42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64899b84-073b-4d3a-bf9b-b2ed095e3d0b.json and https://artists.proofprofile.net/proofs/artist/64899b84-073b-4d3a-bf9b-b2ed095e3d0b.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 0x0733e98dcdda9d18bb4f9a36b864a4ac1274de838ba0cf2a6b1919dd755a6c71. 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/QZTAY2257833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb55bb3284daa4a9d0647d80c7150ed7327202db427ac986e3e1a62cf28fe59. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2257836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5644c37b8f327b89ceaa70a3f3c482665721ea9ad283d46ac9819eb5c4d4b7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA72351623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7532b805d612f68f29050903000985ad0bdea81bedaafa77293646b56457b5d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:18Z), 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/QZDA72351626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e7e64db5c85ae35ca2f467b7d7a914498f8015d50a7f72eadd0f17168d32a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:12Z), 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/QZDA72351627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265fcdc8a0bd5405afdf393267d7ae830f43c454049e6daf77fbf75f1eb53b37. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZES52489908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f9cc7ae0be27b6a1be860cdd602645e34d0461836097a7fa62872642a072e2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES52489913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3664927ccd40f98b72154aab25fb69512b0ba32d62fc557a339d725c6d20fade. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZHN92528429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7254a3d09053d658d49e02968534e7fbc513a2489f55b990dc9e1add4b05a3ae. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:28Z), 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/QZHN92528430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25b82d6559ea9ecae87d4d202728e32f3a67173db4675ac7446ab588ab58b65. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZHN92528431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7546e82ea05500f2a25ea7a9a1d22dd99acaf369b11b625060dd9f8504bd35a. 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/QZHN92528432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe171f8f1226f6523396a01724f8f87835ea63a7ff609239d9db8706afa26bd63. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN92528434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bc9244d8ba4f31c3a44d212c1dbe00d611b20b2f667925f419961f4b2206ac. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:30Z), 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/QZHN92528435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7a67b4200ee614b98916b8ce13b21f072c6d14c257dfb8d9bc74b2bbf7e4f4. 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/QZHN92528436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581df6356d3b3b7851e9314f7a58f904dcc345508c0b38090366377e23674620. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:07Z), 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/QZWFU2579678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf84df1f8c5d7966bd35de4246f643b3afc71c4fa0f5fb1b11c1c9a35a837cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITDF62277004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abf8381feab21e5b3ce43cc5f7fc42c0b8aaf6b7639b49a393b0cdf6bba2914. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWU2325236.
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