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 0xdb788f4722d0d4831b83a56e62e74541574f86e1711a923acfb4921b42ea3f92. 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/988193a3-3aef-476b-8559-314d6180af6c.json and https://artists.proofprofile.net/proofs/artist/988193a3-3aef-476b-8559-314d6180af6c.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 0x2b1a5b63d3de6486a7b3d0a447dd1f1685704a81038abfa8bdf8e3caf05972a2. 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/QZNJV2405873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0658e51f459ba9ed18915af4706c6c5b34a17c7516ffecbc3a06055e121b91c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2405872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafb67e2a4cd4cc0d59409f8dc98fcf161954224757948482de254bd109eab55. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:08Z), 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/QZNJV2435396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fa094dc63229feee847e156ab3e6af7309b437a4bbf58b1969db8f1f4144df. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:58:08Z), 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/QZMZ92499462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c113a534cc1730ae1900df09c352e3dd0905e6700ebc65d7dcce57197fcbb36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92499461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487ae3efb4aef67447b983f9e93127c4d05eacb122ac86fecdde7a6928909bd2. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:22Z), 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/QZMZ92499465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a372b16fa845839cec8bca0ee09c39756263150fe13f51675fa0faf4f414af5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:56Z), 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/QZMZ92499466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bf6165e7846a576ec50d93cc2b06644638a86fe8a18ae62933daeeed040e0e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN42512241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093613726d8e3b2d976957bd1491b7affaf2022c98dc251cd7546e90b55947e7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92576642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f7b85d4092b54f4fb86b081f13aa2695563d41e293e4ee390e1e33c836f6cb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6K2533215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42074608326e6249dfed5d0a025ce5ca33eb51c44598f7cccd56ca9de30de961. 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/QZK6K2530931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350e64d69018356d4d336c2ea4f67ed085155f449fe4e18584ba32baf735e2d. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZK6K2530936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0764f9f5b21a8fc5f1bf887d7af473305bedff5cb2394aae9ded8f154bec0d59. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFH2587820.