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 0x42e504037dbc64c13a104115428191898a5bfdf9e22639569e8597a0846cefda. 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/a5af1bbd-7243-4159-b6b6-af044a2817f9.json and https://artists.proofprofile.net/proofs/artist/a5af1bbd-7243-4159-b6b6-af044a2817f9.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 0xc79a061cc73b43e7a4ef9015f8ef96288dcc8c6b7aa50ed86f45f8044db3bfb1. 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/QZMHM2201566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16661f12b3f780ebdd62c943bad7ec8adcaa4950332c445e4489f060d164a33. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMHK2229808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5af3d48ec21dc2e2829f56a6c585c6fa4b57fa7eb7c2624ae4c351f0506bb1. 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/CA5KR2452369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b057067533497c68e7ec53c667b12b757cb4d599169006378db7180aef24fa8. 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/QZS662455144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884c8cc88f3bce629b44590a8b41f121f3d21d9ef58e689d9d3f81e22ce98b85. 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/QZMHL2476547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf9449c667afafdaf93426e4047923da8045f6008e0aa7028442f90e82644ca. 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/QZMHN2351267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc187556e1d6213c924d2daa601bc9bf90850c9d092d222ef390a1cef3d1c9a. 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/QZMHN2340143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543c4f62dbc0e1db036466463169a3694fa9a091bc1a478f6e31c7f36f5e5fed. 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/QZS642351459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a250a1f01c806248829b52a327c598c9bb2fbef76d5f8b663b6bf93cbcf6a. 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/QZMHP2394467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a42caddc9aa95093bec52dc33aa311b5180fc472f26f95c735b06dee669f393. 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/QZMHM2227345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ea220824253ca9d32d1dc4383d5ce8bf441e3715a91dbb4b005f29e7189de. 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/QZS642236461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb933b3b0b03fff796118a6e90ce28e9453dee08bdb56b396d0e308afb42c33f1. 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/QZS672275680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887aa8354779dcb1a06ef75c65fc74c5c925cf16c84a48915d547daacd8f6f47. 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/QZMHL2273116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dacccc9f41e0eb665aa4a3dec05e3f9db0c99bbd4cfe0fe377f6f77db1c4770. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMHK2289981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd0da934d8e46b578991f269bdd5778f055d05e1d697b788487e5968024350a. 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/QM42K2214532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54aff134193f2e96597f1ed92075961484e1c613c7cead7cc68241264cc202. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS662141961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c74f721a5144890da45b2c306ff578e8b329dd383cdea26b5c2a9b188aa9625. 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/QZS652157795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cef23aade603f2341a881e9338c973b1cfac51c313f85008704edb369f9d5e. 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/QZMHP2094943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408e36af6f1313a7ded3d1d9e08de3be364790fd4a5e1f8d377e988ef34c3eaf. 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/CA5KR2485872.