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 0xa1f73b28558fcff9dda1c260d81b0bd27ee544825080427097d42d68466e999d. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8136897a-fb5b-4296-838c-6ab8e09e3f96.json and https://artists.proofprofile.net/proofs/artist/8136897a-fb5b-4296-838c-6ab8e09e3f96.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 0x79d043e5d93032b99d149ca13d7ca0f16bc5cccf57a4718ee683b6cbf5884089. 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/UKZGC2403443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a279abbda8f9431706f6067029b56cccc2940370877be856ffdf609d80ada. 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/NL4YD2200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194cf512d0d84465588a68b8a7fdcb3bd8a04a4a4856efc0e246e3ddda886806. 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/NL4YD2200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe72a6a545d259e80841ce7b3edc12d8aad460b1feb971168374c69e2433c0d. 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/NL4YD2200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd195a2072f27821d3990c5529a4aa0bc9424e04ae9982503badb5d9df4995. 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/NL4YD2200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb02ddbc13df58aad8cf8dce2cbf0d56d0801d010f1ffff86884f9e43b53bab. 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/NL4YD2200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc59e5887fe341f71a92e674e631c62704c269641b5024c05112ade4b9c85b18. 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/NL4YD2200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492bc176ec6e1fef4dcc5139ee195d1d129a5f08b45eb8e069a4edda77714a73. 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/NL4YD2200215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd15e65f8c7d3845ef04ca2c1a6369c9d26069397c20fc3137b876f9048ad77. 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/NL4YD2200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc09c87650c6544f8eac431119f87bf775b197ae355cd21da697e1103ab703. 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/NL4YD2200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a226a664c50c9fd37de1c6cbae86b65cf266eec9a01e0446c9865568bf144b. 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/NL4YD2200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f5cff64074e5ec56e5e56001fa873ac6435cf2e195acaade5e80d27c156e9. 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/NL4YD2200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c92c73b9d9839528b5f5df361a3975dd8723c1edce39903e28eb3549bdab59. 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/NL4YD2200216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d35f00dc51110af57e1bd025ba1d1c898f1abb69dc32f5eac69dafc94b272. 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/NL4YD2200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eace0e4e75d7739bead092ebc5258413a71fe3ba3abe9e888e3a15dae33199. 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/NL4YD2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8e836af27b340753e6f0b79373daf2a31d7ddc51e1dbbd3fd163861f16533b. 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/NL4YD2200205.