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 0x1e59605569581965a139f763273a34db8a461be9a0b92d651d32752f35230a32. 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/4b0d879d-3def-4b90-8574-71daa08f0802.json and https://artists.proofprofile.net/proofs/artist/4b0d879d-3def-4b90-8574-71daa08f0802.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 0x83f1527ac149739e36dbb61e7634cd1bb8c783a3f7019cd6698a1df36cd24582. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:16Z), 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/ITG271700163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0906518f4b4233f141a6cb71374c3cfe69bab06f4b892047be0e21e247615a74. 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/ITG271700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea5fb9f32db729a3091f55cee5a710febf3ebdc35eb396a91d11a008ca0dde7. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ITG271700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb005966faf84072b00ceefca61a6d3b569669910f4b6b8bbbf707b72bb8514b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITG271700168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2385a07f86b96c420683b5189be047262ecf1b0a67eb95b85c85a35a4ac18b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:43:24Z), 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/ITG271700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35b0bd17a884665e87bdcae3516dc934d00bb96a9bfa09310fa8a1f0b91fe2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/ITG271900719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae64c90af4180686ed76cb3de1d3d0ea0266fe7759b23a8930d4b264eb40d761. 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/ITG271900721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2acf27a6658e3cf125aa0ec904cc5ace5e0b6029e6f26df0bd6b726897107ae. 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/ITG271900726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866dc3428ce8bef4f77e692f39dfba239e300048e3778edb4f24fcb06baa1d37. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:38:08Z), 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/ITG272100976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1753d75a5e099919f27988d298f575283691888c42af5a4042c8a03f807a4154. 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/ITG272100978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d46ff082a256bb51540d4ce77bd8df92b014b512a70a6ab02535bac87d2075c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITG272100980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f74cf0383719264e2f2b2ebd429627f8f36b5f152d30aa7013ae7bd7762689. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:26:16Z), 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/ITG272100981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fad51c578900b982793e5e6a250e03051eb7614d3735dfa179ae86e6c5d291. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:48:06Z), 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/ITG272100985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58f10fce6537b68f0c7778d429d7fd404fe3dccb5d7275b8d27d2bf7e1c531c. 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/ITG272100986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa958ee1d2c69c71b0541302278cafa6428a920b27c8755d2a348dbb2572272fa. 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/ITG272500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f822c363c81c587fd7aabb2c1b24103e4dd4440f24e6a851b855e04f17529. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ITG272500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac6385659f31618186331d403ab5577ac7c0eff5fd80fe57541ad987dc14470. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ITG272500011.