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 0xdbcc6f33cc360c9dd9a0749fd5001811dfa803025e3f612a7bca6d7005f5ba49. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3236dc1-d37f-458d-9e26-10e1bcd36e0a.json and https://artists.proofprofile.net/proofs/artist/e3236dc1-d37f-458d-9e26-10e1bcd36e0a.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 0x811dd2757943c5c1e5b8a603c56ff74c623a96a3e0211fcb8341df530ffc0b48. 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/PLI362874210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f53cd8ad7ff58c1b6c7215c1595c1942e5647454e8e1243f54e38be85bb5d62. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/PLI369721250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3393b781deb48082aab88589804f7dc72b6d57970a9f61072da641c6e6679c91. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:26:45Z), 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/PLI369717510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cdde45505ed5b01c6bcfc25acb02c02604261cce4a946e626c014830ea4b28. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/PLI366291490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8df5b4627c480adf25cbacf15661522eb3cf996c99203a83cb5ae36510d40f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/PLI361345360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf27fc563d56c964e667902d01fdf1c3fd7f487c3457ef9a47cb44ed414197f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLI362255660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf27fc563d56c964e667902d01fdf1c3fd7f487c3457ef9a47cb44ed414197f. 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/PLI362255660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8df5b4627c480adf25cbacf15661522eb3cf996c99203a83cb5ae36510d40f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:55:21Z), 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/PLI361345360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3210711db4e2236f52fc630a731fc046f86f3b0740f8e121d43596b05f9b19. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/PLI365987160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c78dffd5c95c54d6c692a0776e98068bffb5916d4864838f52bcd46f64d892. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLI365692640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404da88fc9ae41c8a7715b846d27c80f8f37d0d95fed79bbb739d2748e511ce6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PLI363854420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09a483f9d66801f18e5bf08ac56afe055c60a0fd51b8ecc5c62fde290d9f56. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/PLI366762820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba95e376633943acf8d74a9a0d568f82d474744af865c099fb153dc9e751e28. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:18Z), 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/PLI369860000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb63b04bb4ef70e8ff9de6cfa539215e4f60327ed7322a826af7fc8f69810503. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/PLI364398070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b13160de61c255abbee4e60a54080b1566741709674a487127c5e96d8108218. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLI366112620.