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 0xcd03b36a96ecd44deffed01168051aed7b647049a9ff7c9326c8ff224c00bc4c. 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/d5d02c1b-f3e3-42ae-b2cc-f4dbd185b4b5.json and https://artists.proofprofile.net/proofs/artist/d5d02c1b-f3e3-42ae-b2cc-f4dbd185b4b5.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 0xadeff0dda76d61375a75eb426ff61675cecb99cf9f6f31c8b77d62ce833c1254. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:24Z), 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/QZFYW1986901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70b9d5e562a651a9a894be6ac30976191b343cee65f469be35af43d43283617. 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/QZNWW2013742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a591162716b4650af9c4dcafbec377134f11738093c8dfae1d533f937ffc3cf. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZDA72159421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7099441cc0953eed308f5da29a7717748da468314408ba19939bfd7b42395550. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2167323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec482ab52e97732986fe7019e20acb60adc5336eb27d7f255dfb8443deb06ba. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:42Z), 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/CA5KR2192231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8acaeca1c4537dcce01c7b3702ce08c8528bef7bc8cfd741bf4cb23afcc4b3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:03Z), 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/QZTGW2100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b4ccb4da0f19f3a934d68349aaf4ce4477b0c5e1f8208ef2c5f3eaf6e82b5b. 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/QZVEM2368697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6d8e3c55081c8bbd64b869f4c14fdad3e5c523bf9a12c105f21f67cad97b05. 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/QZVEM2351583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a629e358fccd19084639b6041243e9a8f095fcba2eabedeb8fa5962cbcaaf63. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:17:47Z), 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/QZVEM2351581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7eee25d1753f874fca84b6bf707891f021aff710e7b137589feeefe246a91. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TLREW2233315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f63938b52ed303348f66c6c284753ddbe6f2bb4ff39dfc1000eaecf7469124. 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/QZTGW2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f00cd2c4f5f28dca9bbd06b24f4a3dd6dade2419e93f2e85e7d2c9083aeec. 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/CA5KR2295902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9a5a8ee76ee97decacedc5ceb2534d467905b43971826362afed7a4354d367. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TLVEM2467231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d396095db6448a955279a044275320853b2df63e654ba23a2f30e4b41685dcb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QT2VB2469919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d0cc4edc6636858d411edd4cbc54f43d85c0eb404be9efe71660928f49b7cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZVEM1817256.