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 0xce24ff7a4d45338dc05ed968944578c26c6b2c440b834a6509fa6fafff8b77c0. 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/64a7baed-da8f-4c39-a16a-e7f220e7b76b.json and https://artists.proofprofile.net/proofs/artist/64a7baed-da8f-4c39-a16a-e7f220e7b76b.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 0x28d0a26370f9706cc6e7587ae4b2eb8983d7831fdeb4b4bda9a9e4f70ad50dee. 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/TCAEO1913669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c42c9e485bedf87ada9d4d69444036038db1faf8f0b7d261ffa2ebc96be3cb. 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/TCAEO1933042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df92129e967d038281819bfa9e922c479b11db9baf926b81b536ba721a7ee4c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAFL2141204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69ea836cc76bcc75eb7ad9ff014199f09da11fd3b6c095325aa199b1680c196. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY42125076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13dd03bc6350a007476d392930a2de4ebcc9024692eb7deb0d9bdbbdb269599. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:35:01Z), 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/USDY42125078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ac1f1be55bed55408b37c38127d3002c58bc287af473a77201566f549dde0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USDY42125081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04207151b223672bca6bdef004ea57948aef7ee2b52df4a0577c81ae7f8b096a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAES2050484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdba715074219f23b3a97b3ff249d12a673cd62109ebcdeb3167aa13b2eb000. 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/USL4Q2398765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6334a8b168d8c5605afc34d7dd495d9a521535449a02abc0944ad42ab526cbb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAFG2099433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63e7de3fb80c606ab91e946e4d3e88710105af6a26450fdf1fd86c454ad64d. 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/USX9P2371167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda23b3171021f3af2c4551f26fc07c5a9b52cc6afae13c41cd848127819fd35c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USX9P2371170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3445729645944e773b6ee04a7808579c108ce2e5da3511d2d40e0601690da8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USL4R2165389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a5ca6fa2889aa2d3f6fb8485eee7288ec59e9b9fd8a18638479519a463f1d. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:49Z), 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/USHM92472048.