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 0x16d88d71cec91b097b64e3d0e75aa5d944f22e40ad5b7cbb09674848599a21ec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdd2da33-99c2-4edb-8fe5-86550da2b0bf.json and https://artists.proofprofile.net/proofs/artist/cdd2da33-99c2-4edb-8fe5-86550da2b0bf.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 0xea7ae169b123d88679863d4720ba5ea33a439ae88082867500666d94d93b2ed7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES5160500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22da6c14cafc958c0e9f063b51c281251201d486696f04bb24b115f72759510a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5160500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fba32ebf43a25d9120aed3e776e540702812297985f1c88c31a87c55888763. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES5160500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47c38d9b298c71403da40d8b09b061895cad0ed63f5ac4370ddc2e1d82e7e0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5160500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fba32ebf43a25d9120aed3e776e540702812297985f1c88c31a87c55888763. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES5160500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a9ef3f571d53e41c66dd50f430e10cd987a8632fbf21e2ced2e55b11730955. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ES5160500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7ae169b123d88679863d4720ba5ea33a439ae88082867500666d94d93b2ed7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:08Z), 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/ES5160500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d7f8c4085a6c28981e2f19b5cbf461fd752566c5bdaacf74f3a6809e388796. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5160500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22da6c14cafc958c0e9f063b51c281251201d486696f04bb24b115f72759510a. 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/ES5160500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0666218a1407c8c9db6fd53051134a11e29beda1b281a3bab2a3a4a6d1d911. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES5160500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc3c6df5b4576274b98fa865ff80d6b64a30cdec7d6fb513187184b52539a7. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/ES5160500249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d4bbfb7b1a5ccec67b683ce356dd4428a50ffacf9612899a7df60f2f5bfe1e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5160500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8995fb87960e1cddf25db4828e0eccf87d7486af70c884292143f13f9c4665. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES5160500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47c38d9b298c71403da40d8b09b061895cad0ed63f5ac4370ddc2e1d82e7e0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ES5160500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66329886db6e838424816a1ee04f12813c7cdc62f49e9fd88949f6d73f09eb. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/ES5160500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed23cf16821766197e7988f0d3478a05e69d046142a2e0df10dfa19ab2ac1d5c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5160500258.