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 0x68f05a5b8f601a5b9eff3bb185fab8e76c89f2d918c8634b6d5921e8d4171102. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a0a464a-4cbd-42a5-85d4-3a52995b39f9.json and https://artists.proofprofile.net/proofs/artist/3a0a464a-4cbd-42a5-85d4-3a52995b39f9.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 0x32a0941ea26ae7dc696bfb80035df7d41f8b9f50704c65bfc96c01c33f84936e. 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/QZW9N2253352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e27b50cb54b27e6a81e2dc68c009dc78d4eadfe85172ce69869471edb4fc24. 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/QZW9N2253355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3c7a83b23b4be81258a77c9b921ef3acf1d9813fd4b5200edbf55bebcdd7a0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZW9N2253357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720283870a9a71cf67217e311c644e2a593846d97ee3d863e5608807ff5395d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:23Z), 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/ESA012229834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa83471e79b2a1c93b565bec9d6653ed979d391ed4610854a8d8b05216b7f58b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:57:33Z), 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/ESA012229835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc866f82d21863c2adf5db542e012f430cfa8dcfd533ac1a0c187f931cd200991. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:03:55Z), 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/ESA012227840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9ac338c84723280f6bb1c95c9472899c133fce0948b62c73036daa1d6bbe81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA012227844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc866f82d21863c2adf5db542e012f430cfa8dcfd533ac1a0c187f931cd200991. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ESA012227840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9ac338c84723280f6bb1c95c9472899c133fce0948b62c73036daa1d6bbe81. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ESA012227844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e0379ab810f7103780048a992321efa2e444908b65dc35451c192d93dd75ff. 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/ESA012227812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf7b584a33f66fd846fe16f5ee0db35b8146c4321dc8c98a5ca90493b654ddc. 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/ESA012226675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3394de5a52ba1ac24ea5dc585bacd813fffcc564e5b83e676e3fdb9e29938ca3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ESA012226678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d8d85d72ae70883939e4e1ffc282a57642a5404c8932608a0996221c141a33. 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/ESA012226677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3394de5a52ba1ac24ea5dc585bacd813fffcc564e5b83e676e3fdb9e29938ca3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ESA012226678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85b7ba2ee2f6609de2970f060817b8376dfa9fe6241fd11562a2dd546cf385. 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/ESA012226680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe5af69b96bdfcd77161c0699ffaeb2ab82bdc7b37b674b56f1e55aa2324a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA012226683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e61fa40dd5c113ec0b489f58d19dd10aa2f9a9567e31fdac6e2386a1bc8ec7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ972462923.