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 0xd694fa5e8f4515208ad41d711b5cdb63e4b03bb38fc1599368971a64e3114f18. 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/81f02b40-2c14-45f5-a8f9-bfb782a2f8a7.json and https://artists.proofprofile.net/proofs/artist/81f02b40-2c14-45f5-a8f9-bfb782a2f8a7.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 0x04d46fd6d285417cd5900ec614b99a545708cf7979f447a753f2bcbc97994e2f. 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/VNA111900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875b2b323ebade32f9177c5505e3a7a54feff482f2054515ee0598fd16a3ce39. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/VNA111900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b304f822a68547b4b1ded8883a66489cb9b9096aef5492e6fb779852a8bf316. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/VNA0M1909550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d59d34443e9db88b897ecc0a793125e9521ad27dc3438542fc309d262a9f42d. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/VNA112300839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a248fcc2a5164bbfa3d057378ac0c4fe71bc0ed72b15e1524bb92984ef29586. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/VNA111900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063203c28247a329fcfff9d10acce30280c4a39b6ec660b9d0e7f755d8e4be3. 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/VNA112400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd120cdcdae8a9a1fe3209a52512872450399872af8d65850666d0d641c86e. 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/VNA112400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425e5595fc303c1d8725953a1f3fc01d1461dd0d29147757b3393dc1a4bc196e. 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/VNA112400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818cd1870ee26b409bf0e71f1ed9511fddf98a33b641b5ab70e50c528e6735fd. 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/VNA112400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063203c28247a329fcfff9d10acce30280c4a39b6ec660b9d0e7f755d8e4be3. 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/VNA112400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e801dbf306e870d8638f00e8f1b2549c3db45bcffc103d95f0130c872ba50c8. 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/VNA112400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a6cc6e202ed74d57112d552b84a49d82909be096c814155942afe59a9a9ef4. 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/VNA112400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98ba9732d360a449898498fcabb0a6c052a207c7c6b6e26b3f73843b3f1a95. 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/VNA112400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be563b7df4983dc86db1a59941532c52a8e35977f2e1971bd44938505e4d9a. 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/VNA112300881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80de795738ab829f60e971b213509286ba4b977b828e93d97eb6a3f418957cc. 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/VNA112400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9cb78e8951ec144b426b484ba37f763d3ec16050017360d682457c0c3eeb05. 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/VNA112400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db368dcaa4148e575ba1a45b6c963ea9638d0037ea8e37e1c202856c1a03c4a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:21:59Z), 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/VNZ992443693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8faa1ac8d6c464b6710c3520af17091b1e5dbbf0e633b6f03ebcb7dcc80034. 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/VNA0M1909601.