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 0xd59a22de2a0c2210db282a1bbc2b08117beb8359aa3c4a8f1a395c168df227f5. 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/b9f85d8b-ecc6-49be-8fb1-6bca4f944a84.json and https://artists.proofprofile.net/proofs/artist/b9f85d8b-ecc6-49be-8fb1-6bca4f944a84.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 0x40c0f932e2dfc8c563a8a6f279f8ab9049cd068b92564f5b60c1d2794885a796. 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/QZDA71921936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9420c0d41cd6303d21f1aafb446860c3cf4a4d8fe7344b306daa14cc0288fc. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZDA71921937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4460317edc39f638b4b93ceaea6741e56e4a95aab824081012b19c8916bff8a2. 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/QZFYY2038668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1765066e75acf73b4ee29bb78339174812ea268d37a81de35763eeea82dcdde1. 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/QZMER2011412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c6958f40658a21bb1633e0702c329c39835c2a8e3433c52d020ec5827f13cb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAU2181151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd4344fd1bcdb4e16fd167766caa0de738eeee30058947719a77b717923047. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA62206338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f1c0c4b5a36d5f5e671c7d289ad009a90fb07ccaa94122fece23b2656f66d. 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/QZHN52231369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164c3f106889da946bf31ceed61c2bb7e7c6f3d0f86d3c986e6a2d328bdb6a6d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWW2264460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26522dd9d67339a66a7e8ef820fe534955d4b494bb994e0dfcf03fad81d30ed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBA2241786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59786bf01e4206eda167da44d005198315f8227d0940118f2924ee8c97680027. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:01:11Z), 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/QZNWZ2385679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da46a2bf74a3015e96574d0282ffb1166c3b28aeae8503ee7921af729f0618f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:02:42Z), 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/QZRP52396709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164c3f106889da946bf31ceed61c2bb7e7c6f3d0f86d3c986e6a2d328bdb6a6d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWW2264460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd244b6e70b03d9b3e2e29c4f90cf851402b80a8ebee93e1f2bf11eb5b3f1de07. 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/QZTBD2356993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8227c561dea8158602d846ac48c8a97e102d3bdb14af8e466deaae5160e04a41. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAT2428764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ba388af5dbdac12eae622c4687a960a53e9a5f5a88819df292a93690502b1. 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/QZWFH2449320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550ffcc0137a9e5f86a8aba437cf29d226b31cfa63023409db090b999e2cf81e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F42417213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdd84f50f1745c2f3751953f4695b9f14cc571ab1a837bf05ce6cd053a2c5f5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT4K52544856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7934546be15109c024a564e1858c296b702eff0f0f3f0364d03e94473f7c5df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K2115914.