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 0xf713b04aed9627e17036480db0f2d85577a2b38ee58697ad309d4333c82e3664. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d434197-bd75-4f48-9aae-011265b4d554.json and https://artists.proofprofile.net/proofs/artist/2d434197-bd75-4f48-9aae-011265b4d554.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 0xc1e9bdc5e35354b06707ab99e294df6dac7125bc00ec8962b053d8338f5ac6fa. 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/QM6DC1610124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1213f5e4d7f165f3311083b98a381f6c31de39183619c4c1984d6792494e3816. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QM6DC1610125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fb0b37c108005a2eac55cf3b415f3256829ae20705a24bbc4bb0a40cc3ad66. 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/QM6DC1610129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c51ca654dca18f5faaa29f10a2b957e415619e88097f0a96d31084f87cbc114. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6DC1610130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2f2de1edeedf76734504b4bf7a3f17f07a8f70e608f3e9e6064d88637ee492. 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/QM6DC1610131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dc46db149165121c8f399ca60f5f224fde15c76de70cd83bdee5c6f2be6ba0. 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/QM6DC1610133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d13f7e8643f41acbb5fe18912853e74f11c4f997e97be8304a347fc3ababa. 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/QM6DC1610134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80141450dc57545e443a9e79d9984fb8d11d7fe3a42ec521fefa38ab2c59dcad. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6DC1610135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2918be55611c9a7e8ea542e041b7f7bcef1816785e575a95a7b711830379938c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:32:46Z), 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/QM6DC1610137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802ee15e77ff9e71a9ea55f27cde61b72e2a4018165c5321d141f5ea05e329bb. 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/QM6DC1610138.