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 0x32182e351c308cecfa72abe4d8de6896c3abce1c4f2f47e1986530f4c3c4d9c4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e26a9839-441e-4984-861a-98b7d8499e3a.json and https://artists.proofprofile.net/proofs/artist/e26a9839-441e-4984-861a-98b7d8499e3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Injustice 2 (Original Video Game Soundtrack)
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 0xece47da137fe3fa86152669359c94d457a3dde2e3f321353a5f1c32e2cc0ec7b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USNLR1700474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ebe7d2d50edc82ac63570898e059280d6e3574e57c46ee5cec71a418e4d26. 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/USNLR1700482.
Anno 2070 (Original Game Soundtrack) [Collector’s Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a07f0d0050a2b3cc34c04ccbfabe1f4dfbddbd6e268af8766805789b0bc4d66. 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/CA2BN1200837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c55e6a850a15998271232ac3830a26c2a195528993d86ece8cb858e605c29. 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/CA2BN1200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6f207c43cde0d961a55a015234490a98061434fe72eed78f20fadaca1299d8. 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/CA2BN1200846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce48b5c9ca12f40534a41b0abfb3f65df3efed7de9390377abaa0eba250a26f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CA2BN1200849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4335fc8023c538b6a2efe6567bbbe9843d71c7889dc418546a24d5d824cbdba2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA2BN1200856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd319f6d604ef010f9d0840489ce3cd981aceb14b631c2b1440102ffd07a89832. 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/CA2BN1200858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf505112ef5f179bd8b7e07ab82dcd83a29575134083df0e6d5a7a7dac124fe. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CA2BN1200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01034f777bb5fda0dbba6522db662d7a1d9db40c58bd5220dee8b21aa4b3782d. 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/CA2BN1200861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c8ecf1127b6d37464a2d9316ec01c683a210f58878ff9d7ed776f62a1f6e04. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA2BN1200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be6a0710453c96f4b2cafdd3c6531817d78b35546054a56598ba53c46afe2e. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/CA2BN1200867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a1fc14f50be5ea56e30930cb8f80038a73349fd04122a4f80aa24eb16bad2a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA2BN1200885.