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 0x0802485b062e709140cb4f932ceee504b8a48f712a57108d897bda9708e18847. 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/079ef810-354c-4455-a20c-24e0e2d8eec7.json and https://artists.proofprofile.net/proofs/artist/079ef810-354c-4455-a20c-24e0e2d8eec7.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 0x7f511aeb2abfc24d7f0d616c3cd206c4f88a091fc8e523703de46aa6974e2563. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6F2049108.
Too Alive (Cxmeesen, Cru Alxndr & Asia Major)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4b32748971120a1d4e66f35d03dde69ae05981b072425c4e9ab46b1f92ce6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWU2208810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35936ed6aa0e09798af51619a1aa93692ed23472db3e0f7da2567a9ac38dd51a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZHNA2372917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92025356329b3724834f865da27565aef8933e538d829ad1b5a7ca6116adbeb0. 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/QZTV32341228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3adbaca51c3b61fa56779c8d9af5da19cdcaf3d53074972d664ceb0ffde2a0. 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/QZS7J2229579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee99a2959a569957ab32cbacb7beab684ffba4474613db9fcc323fc1c3f91910. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USLZJ2367527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b2de4f155a599db82052d3a2f3791b14b499c7edcc45a88222802e02f129a. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZTV32384368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3bf098606b47aae736f26f5d9497d7867f175dce95f141c27dca482d3b56a4. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZTV32380008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901a4e64ee3796be4b868bd4d117b05247462bd2080fe42e37e667294d9acd88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTV32376947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0045c9a9b69aa20ab450780343b4dc74c8a350843545c998dde2bfa0b0d26928. 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/QZTV32374454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebe1e8d94f80466750feeffc77dd9e18133ec4984f47e78ae48aee1f06cb4a5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTV32341276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fa582e7985fd8aedbb8eadb5bf91fc118110f5a12daa305c1973525dd0e5ef. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZTV32341307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62646a1739817b040fb5598249c52364bfc8ce443ac32d6ad1d7000d5576449c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTV32341317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92025356329b3724834f865da27565aef8933e538d829ad1b5a7ca6116adbeb0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTV32341228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee99a2959a569957ab32cbacb7beab684ffba4474613db9fcc323fc1c3f91910. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USLZJ2367527.