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 0x2522e78e16abae6a90d5b5f1e59eb7db2dd48b729990248799e5484c8f7638a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3ec1833-0bfb-46f6-a9d2-39295bcdbcff.json and https://artists.proofprofile.net/proofs/artist/b3ec1833-0bfb-46f6-a9d2-39295bcdbcff.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 0xbcfb383ff2995adaff6417f6990add2401005bb0c1ea0164c2c5d14861b48f9f. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCABD1271288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282c035cd09dbb74b8c52c4d72430b3d505595d5ae0a794dae2a59783f9904c3. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCABD1271289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680a7eee0b2b10341b49ad71fd27e73d337b313c2e8b5a77fa8ce7951c88bec. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:36:33Z), 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/TCABD1271291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1f682347b8f008d28ef112d44510ad230df5c06c1065f2a5beb0c2d80399ce. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:48Z), 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/TCABD1271292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0fa67e5d3b57cd30a945a0dcf08574e2d741360cfefcb728b4eb4579c6f03a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCABT1449797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9a2af30094bc58a0cdda77b25b5b00105c5b19f062107a50b91d08b4c72fa. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCACQ1611891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32425c259961e030cdaa5e9a72ba29f8077dd4447e97aea18b5902d4533552ee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCACQ1611896.