{"copyright_id":"0x8840b46385533aa5f1cea8275feebfa152fac1ecaadc64a8bfe4ea6dc04a918b","name":"Traditional Gregorian Chant","registered_at":"2026-06-14T20:14:02Z","symbol":"NIM0564051","token_address":"0x7b21fbaac411c4f038a8844b4cdf4a06684a641f","type":"artist","uuid":"95cdacf2-956d-45f4-a5da-f1b509eb176f"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8840b46385533aa5f1cea8275feebfa152fac1ecaadc64a8bfe4ea6dc04a918b. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95cdacf2-956d-45f4-a5da-f1b509eb176f.json and https://artists.proofprofile.net/proofs/artist/95cdacf2-956d-45f4-a5da-f1b509eb176f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb2949ff2eaad02c0297398ea4be775a6bd8c368b8e11ab6a26efda134d2b2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US5540900561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3f9c1b46578f99517b73bc306c965a537928a5411c98a618054a9c136618ba. 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/US5540900563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf29796a11727ee28cd36ac7533ff9dd3d62083104b87a049b368d7f86dc60. 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/US5540900569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af9a0da0fecfedfd249b9a79b67c6bed5b4cb82c660b034f1deb84c01b9033a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US5540900571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43095566e1dc04c7624dc35d1e1aaa48048e311dec74d5658d66ecca1a4faf77. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US5540900572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fba0a28fc26c8cafef24cd4b7455f26cf0f26f725cf6211c2c68ad646961d1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US5540900578.