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 0x130575b5cdc35731e17bb7a8507b2da461e06b586164d716f06619d0000dd043. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e047772d-a731-40e8-903a-479eca97a426.json and https://artists.proofprofile.net/proofs/artist/e047772d-a731-40e8-903a-479eca97a426.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 0xa0d3ab70f8fb3037b30d8ca2e25a69e6fac760304f30d3de00049832ecc95bb7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZHN72572106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39972309f0b771c573b021225716819f0f6416f32aee2110f822938d531848a2. 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/QZHN72572109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf911e72d44ea093dbf60c373870a55494397269c737129db3fec04234f608fb2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:35Z), 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/QZHN72572110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f80cc617a87331ee26bd82fde75caf063a96e69c5644003049a54052ced361. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:58:14Z), 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/QZHN72572112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28b050251ddcd1cc6c37fdf761f364fbb3604490b2f8257d6bddc537cf44b96. 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/QZHN52530309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d7fa6e4ebc99b7e4bcdfe88de262d9d3ae738ba3b4dd669c41c7d72bbf41c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNC2576092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87249db34b69f73d03cac28cdb6c5ef5099695fefbe6bdad2f206659af55ef6c. 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/QZK6N2587390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1985bed77e7fda5cc087967e31f63ec16d3c53d60284813fa187fae402de0ec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6H2516611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427089f599aae307629d6cdd7cdec2beebf42d873ef8d1d277cc0d8b01a45996. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEM2591229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e285eb0602b8cf4dd6a189e83ff85c1b830e416ceecff67a70d5f3891ba583. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWT2531072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb22045d5025242281ea27c597df60ca7e48707d680e75045d2295cf1964905. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEM2534276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6414069756aafe4b7c37bab54b1513e864589061ae1d64de20e534c555b77a44. 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/QZTAZ2504646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f37431f34b84807491477121c50c99fd735d17755310af57885dc7313f6e79. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBC2503647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dfbca74ae5be7df73271aec738f3111a1f1261cd968d9f097d9b5a07a2c56c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:55Z), 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/QZZ7U2533819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420379332e651e65015074116e260a622cbad759dfcf96a2a63ba5d63abed2d. 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/QT3FG2596006.