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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf67e4400c0d17787d0681aa6ce9c0bcaa5dc3d623a855e268c601b7082cc68. 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/48885740-92dc-4242-86a9-dd8ec2169a7b.json and https://artists.proofprofile.net/proofs/artist/48885740-92dc-4242-86a9-dd8ec2169a7b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea3c3a8464ecc54bbde4354fcb3c731655c1ed889d7006a0a1c1bab71c016b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPEW2131669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe143fb4a648f5ded9e2344e58f2e969bc2eadcfbb556f08249227b30e5bc849c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZVEM2342112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353f62e561aeed29dafb7d8f91328c73d8c7edda1b02372dba0ae8dd6d34d38e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZPEW2289698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053558b451055b171979ebd455d04db5123fa420b2e90b9abbb473f38983bcc. 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/QZVEM2332821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42693b76c49c3692fcfce0b0a7042284d7600ca6600e48f289937b8fb0dbd9b8. 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/QZVEM2341149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10821e508de79c94e0d6c07a15aa8ce80b3ad1fc89c1990e677f35db610de268. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZVEM2341150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c94b08b3c761e293e7a818f213d5528469bd77987f881af3f2695095e48a4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2476469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4af6003c9ce8875322febae5aa3497bc9529f31d29c454bac5e45a52d29dcd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:41:04Z), 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/TLVEM2433181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e991d882564eb5f45bd39acb3da997274c3a817cf66824050ab08a650ed929b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZPEW2448213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012838c5d30dce642d6fc253a3267131f9bc71b4f9c592d1568eb154d4ef7270. 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/TLVEM2433182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fea8cbb14073e9ffa118a2f7f8dd99c218f79a1beb9d6d3d066dccdd4ebf0f0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TLVEM2433183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2523326f49bb79de81eb56f890a6adea8549bcd739794d5db7e2b2b8e71371b7. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QT2VB2490951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0fd2ca7b14f003da1db90fdafe8623b4ac9bdf6e291a3c5c5c8133f05ed0d9. 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/QT2VB2490952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328f4d5e3ef119b9460125f8a70b1698fab3c24013c8f35a3284e493b54524d9. 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/QT2VB2490953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c048728896b657af27ea339ee563cf2585aea3b5639252760113ac13f18f1. 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/QM7282330230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd594599c5b64b26d8996505f798899b34af1beda8e1391603979d5e794ba52. 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/TCADJ1733749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4d90a43ae6e04d4ec614b1737074f8963f72c0286087f8f4b46367eca558b. 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/TCADJ1733766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c048728896b657af27ea339ee563cf2585aea3b5639252760113ac13f18f1. 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/QM7282330230.