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 0x53207c943a9e16e8ecc908b9572cb86bb8837420fd75cd696bf8968c932888a8. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/454bd718-ee22-4e20-a3cc-db498dc17884.json and https://artists.proofprofile.net/proofs/artist/454bd718-ee22-4e20-a3cc-db498dc17884.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 0x994cb6fd751c5af64ec55dca0a87abbadfec8fb8952b4b2370e2546d372acbc1. 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/QZHN72297817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd0600ec20bd1931f404c8d495f575d388f855a5964f67bc73b414b1fcf832. 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/QZNWV2255156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef3e7863c165c818c899a1e1c89e092f3ff40ec4429a043cd6c8a60689a5fc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYY2373240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f7d413f0f3e15fa44afc4e4d7b004b61bc0edbac6c4ec9163791bf4f7384b8. 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/QZMEN2383143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c29950a1a74eacfedaa9a44d23ff20a4d64cdfb44efadd068c1442b725f0b3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:46Z), 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/QZTB42328224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5aa7417270020221020f149a9a151f07f947308f7f2675e0a8c05c7c1a9c79. 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/QZTB52336002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea515afc384220ff2ce6cf57a3c4ff2d0905a628e8914a03e31feade99e862. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTB92374367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bbce57a4408384aa9a8d627a1faa9e3e926a3daa59a1c50f038d01c6f3b1ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:30Z), 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/TCAHY2458875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d113d46e177882fc1c91f8c4ac15ea3c8e29f1caf1d33209926d4f61f2b61. 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/TCAHY2458887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aeda5f0ae1f9384e0ae3155673b8100bc70f3a2f57b9c0f82e01a94efe9117. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIH2429829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e8ae9a91ca93e07dd94332d89f0d170347d65f7c5a178740762899f9c4c62. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJB2423073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9bbf3c12065f3577db467a5f2061945d8d538419161dd0ad4191137e42acd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:22:33Z), 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/TCAJF2562321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c7bac6ab3c153a19a9ad01455b0eba2b272a35444d97b9ba1fd792521705c. 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/TCAJK2596825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70721c5e6f22cd18a5dee3223f5f8e8c185bb16761225bc759b4a1d7ec9160e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJP2592547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96521a752c2ab49840fcda84a5f5e06acac1efe0bbe133bea8567876c5f6a2ad. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:27:09Z), 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/TCAJY2533197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36bc941a458880d6217858a91549a910eecd4d8c4ed115a262d59dc90eb5bb4. 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/TCAJZ2533263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67123d0ce9d8715005f4197e3a4d54c837a73e4b7c2f4f3e227554268535149b. 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/TCAJY2533352.