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 0x8e21cd5fc0ef3b646db909597ac41e1ccd4a7774e14445caf54378d50f766ef4. 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/fb531d0d-f882-4e8e-84cb-1e49238b8e81.json and https://artists.proofprofile.net/proofs/artist/fb531d0d-f882-4e8e-84cb-1e49238b8e81.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 0x2ec7bbebfecb15476e63bf5a5852f2ce1cd69d3f440172f4f2206ca97ddba8b4. 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/BEIW12300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3c3f2070276553e68ce0d3ede43c0166a40b8fbb573ded14c1e701c889dbe9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f96f7f94fd4db3adc61b19c6bf21e3926b5173434b5052ae1bcddfc69a908ea. 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/BEB682400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d5ad3066c8fcf472e5569405a1e0f541b88946ba0682be8c784aeff6355d2c. 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/BEB682300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3520f7c6f15d17d8e9314dcf4c510c564a13d34c17548e8818a147f18fd2da. 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/BEB682300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257532a0a79916a30b4aee8f19ac917e862564e01b6ea89a289eb27f96bccab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEB682200492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22e419c13880d9b9f397d905fd17f82417f301f3a6a288fe770b6e5861b2e65. 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/BEB682200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3970e978d8aee447745ccd9600f38067ce4d75c106213515eded7faa7bbf129. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BEB682200353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc52ea04a108ed6c8751db01ac16264303a0cbb3b3bbd48d865914c2d5d7e6fb. 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/BEB682200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4df250506ddc930195dec98855355f509c80f8916782239bd4ccc3f03548d0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BEB682100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f8c77f3eaef6dfdcca98f84559f47482f9f53724c4a759ad69ecae003258f4. 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/BEB682100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004a105a91963506b7e61c21aac5ecba18ecc64bc25f034cf53bdca40d5da1b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU7425151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811c157fd9c0a44e6391b9181cdf8fda3568eaf9c1db919e1614b669e44cdbe8. 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/GBSMU7171504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdb72ee01c79f173b98482a95d2ef73995479077bd42db0bdc9f3b8e0171ee5. 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/SE5BU1938976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e39b6209ce3e772c0593677031b3d71d48a70f0d974395156fe47861dd107. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6A91851245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57846063c161343c5a5355f7283dd07be3ceaa40e17846db8f0f9ccc412609de. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6A91851243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf8f02d549a71245501d91d2ec0529e723ca1952b2988c70123465e1b34ea24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEB682100503.