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 0x8d0a753a2363957a86e2a12872b200dab7c85a0167feed8e836422f7ea776737. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0d6356c-65d0-47b6-8fcc-a3c2e425c731.json and https://artists.proofprofile.net/proofs/artist/c0d6356c-65d0-47b6-8fcc-a3c2e425c731.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 0x8a7fb99ff16cf087b290144482a83e3283381e96c01b9b18d5d86bbdd58b0d2d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:11Z), 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/DEYW82503432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b5b8383eb29fbd3cd6380a08d4ddde467559dbbc6ee19767e4703d3194078a. 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/DEYW82503434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e522fb5c82c6a410c0c07e7beeadb9928229084bcf7b52ff555446ed6869214. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:46Z), 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/DEYW82503435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ffff80ade9278028488719031a786416494c08c68bc146635fd50053fb9d15. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:04Z), 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/DEYW82503436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c16fac727f14c01ac66e847016c96e2f0e5c75677d7d6da4a1a8864f0028d6e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEYW82503437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63857cadda61456f9d2d042702b13386e346fdfead29c7b1cf885eacf170d9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEYW82504810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7adb51bcedc704e38d70643cd8388d116a48355af785fa8cb1013a1b20964b6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:26:27Z), 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/DEYW82504811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc266d5972b727f935fa3d250ae6de2a208f7b2bf22d7a265731ea6a44b50c061. 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/DEYW82504813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f8081c287e2cda52c8125aca3ea6b7bb65745b89980d0067cd334f05ef64d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:58Z), 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/DEYW82504814.