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 0x15ecc5258a933b84168485d40c1cf8e10874c83871cb29b82775385931e65a15. 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/ccff0c67-b887-4df6-8095-58f993a5ad3d.json and https://artists.proofprofile.net/proofs/artist/ccff0c67-b887-4df6-8095-58f993a5ad3d.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 0x9bb77bc64dec4363679920e2f50ea7517c095dc1e41fd68d0681733f94500d20. 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/TCAGZ2313931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386c6a739a8f16de74fe31f72da62e5e71ec2e4adf98b5f00346920b1608e78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGZ2313948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe23fbd84069ba84f01e8541c7fefd070e53b9fe2eb4a94c1d0b30658e4cf211. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGZ2313916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0079dc1888db11bdbc20223bb2b3210fab294b732c448fb2a9479e69358b8ad5. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAGZ2313923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb77bc64dec4363679920e2f50ea7517c095dc1e41fd68d0681733f94500d20. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAGZ2313931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386c6a739a8f16de74fe31f72da62e5e71ec2e4adf98b5f00346920b1608e78. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAGZ2313948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d217a9e23f3e5c7e4363e667786a8453ef5da6cbae540c89acd1a38eee67b9. 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/TCAGZ2313958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62db073e1b34a49d5d263aebca537e7d60f4dec161a182dbe46c96f6948931d. 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/JP92L2422790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84d1bfdf80573892964eef7c0a5f71aecd559b7a331e04c5b8c6c01889c325. 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/JP92L2422820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7af883eb903cb845b82877150e0860d52bbd63cc91735c78623dcafcf15bb6. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/JP92L2422830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8014ac598bd8bb2bbe33ae55b22b6219f7e9fe48b102e53e7c7f9e4216bdbadb. 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/JP92L2422840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62db073e1b34a49d5d263aebca537e7d60f4dec161a182dbe46c96f6948931d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JP92L2422790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dc508795278083018c42bb5c21d385dffd3ab792f0d543822b4d12b7955341. 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/JP92L2422800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84d1bfdf80573892964eef7c0a5f71aecd559b7a331e04c5b8c6c01889c325. 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/JP92L2422820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7af883eb903cb845b82877150e0860d52bbd63cc91735c78623dcafcf15bb6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JP92L2422830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8014ac598bd8bb2bbe33ae55b22b6219f7e9fe48b102e53e7c7f9e4216bdbadb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JP92L2422840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165b81867485317c1db18bfdf427de9acf7083fa598f26100d80662879c19ea. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:44Z), 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/QT66J2587775.