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 0x0efa178209ff4c6f59f089c20ecb4951df9b0d116d84166eea83e3f172bd5608. 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/35164224-a0fa-4ad0-8eb0-a6ca6814fd27.json and https://artists.proofprofile.net/proofs/artist/35164224-a0fa-4ad0-8eb0-a6ca6814fd27.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 0x4a4cf54bc56dd4286c3b5e4cfb06d4667355939c3af94b19ac7cad46fc46975a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA552300738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4769c4a492c3ef1d8aa579f4cda870a46c0f38e6ea00cf78ba8844c8dca4d3dc. 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/PL90K2100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a16bfd8b54577b85cc4f812bad3a0cc7ca0751000b6e17b99e04e01967b919. 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/PLA552400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931629f52f0a76758105029ca8fa6c5b95cc76f10b8def9c85d97d0d23ea4aa8. 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/QZHNC1978716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb486e36e883e7dc83f483b10223523696b3038d4df5ff262671ce3328f684c. 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/PLA552500356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a77d916790109f184b492ca13690bf36f2f40b5d65867c3c0b4a13075209946. 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/PLA552500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f108af7843d744bf0bcf22a4d65f6f1aede3298753be83f8ea1b369f0e1e7fd. 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/PLA552500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6a1a574b07203300a82de4e7a193692c324389c8a18346163b5defce2612d. 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/PLA552401197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651562c025b1585f5f2caef5ebe99d7603dd2bd7b7e83eea7af6c981e0ed305e. 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/PLA552401019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd007b0c79798da3b13056e1799d46fe99510805a27f094913059ddfab7417ade. 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/PLA552400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707fe38db0b6c9a9dc161972f3adea61278d29b00d3b0038251f47e8080b5c79. 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/PLA552400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c6c2658b4832efe035e93652e916d0c97771bfbc08912a152391bd1aff9bbe. 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/PL90K2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b8410d57febd7c93df7cbc88a7d814b7d3ce3a49e49b58b335c09da4ed75d9. 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/PLA552400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33f8dc61ff1f2b50f68dd179e91452978ac5c12a3baee8ed29f7e90a0bdd698. 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/PLC062361268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e37f45320504f73e2defeadd0143099831710d4fdd9a3438e33e8212cbe0db. 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/PLC062117536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f42e6be316b1baf569597adea599f5df908c5b6ff35f137301553f0a0070a96. 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/PLC062424299.