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 0xdad1c2cf4cf5f670faf1a91b4de770a694cd3ad2f4fd81f1523b4a4e57bc7431. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b16df12b-778f-4af0-8dd7-0edb048c33d5.json and https://artists.proofprofile.net/proofs/artist/b16df12b-778f-4af0-8dd7-0edb048c33d5.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 0x59266d093b1791b269690d71783f8aa8aa63d8c4f74d726c85cb80fcf735673b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:19Z), 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/QZTBD2346264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed574a76da6d90d52b5fcf0c8335883a2e589788b4b1e3f00abc3b8668c620f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTBA2302271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf3f04d37cae3be1ad004a87e3c233fd5ba8297d38ee413fb134a9a5f6709e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTBA2302272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6480423b8303336e53d3fa4151bed36e906ab17d2c03b61ea914a5467ca0e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBA2302273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6b37f87f9a120163b005b0159493c4c48d100312d50f9488f73b94851c568. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBA2348508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fbeed572f6e39c8548ae4a128a94493ef55077c60b2b2e958ad5202d5a34b4. 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/QZTBA2345790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b14b9399164df8c249accff35e95aa4da2d3fdcc541ff0aeb464486b34eb3. 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/QZFZ72403950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685af2965ddd0cc05e21407b49f687f758bf700442e0742f1476efaea16fb543. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:59Z), 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/QZFZ72403951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c898c0beb80ca2fd614d35c726443e13aee119249a35abf33e019a2a7e95db. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ72403953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d9ffda468363189c009382e1acdefdeb64580f96845ab03c24c3cc57654a5b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ72403955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5f81206e60f7b4903ce2b62cf9763685bc860f4b448fed9a1af5ca733a5c0. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZFZ72403956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7911869d67cac33d248204b8680964091a32b3371f4729c01b89e5bdccbdb1c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFZ72403957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe097225e5918b251a6c5b07c3f6e702d5c42ae3def88042a67978d032dd39b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ72403958.