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 0x3e87d77e7f426038692b26ed5488795b79378d88fbb1bfe5173a2ca79c2a6bec. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53f04f77-b454-4c5e-94e4-3f127c94c729.json and https://artists.proofprofile.net/proofs/artist/53f04f77-b454-4c5e-94e4-3f127c94c729.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 0x932f509b0e00f7525b3ef968be8441ecf4a68db90bd5c8dfd092efffa620297f. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZMER2001288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025f909292a9dd867df6a85e7fe9875a824b502e25c224e4753c22e581cecb24. 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/QZMER2001289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7e4d21656d09629585d398609939f73e209ffb1c8fe4d16e5399c0eaddec06. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHNC2141416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860aedb38cfcc380e48646d677f9d9f77e783641e16fa18fb573a75ec5e96ead. 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/QZNWV2184544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ead9f88c5c5dad009a7e507ea029a988d33f2ca59eb8374c85692c72d5b73. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA082205928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16f51b509ddcb8a3267b8e926180a0a65d8d93fe71d690b3ac00e0affdb0aa2. 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/DGA082205931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd4d8e8dbc2db1f4f5bdea182476eab27a8faa6f97c6397b519c314b76f69f2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:45Z), 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/QZRP42219548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4018f57845a25df6b565f5ac041cbb386bdd0fa08ffd1a4de6b21a2ed3a48116. 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/QZK6G2312270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd2e28fe3a35059489b014d6995f94556968d9a2b81487a2a8d5f0617963c63. 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/DGA052453292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddda04dfdd87b973162b6bdc1cdb19bfabe77359eff2194d62a896d87c24120. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0T2449668.