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 0x93e2a8d85730bfd74ab5d0ddd99e1847a5b08698d4438f27d8960f8b1df917b7. 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/bd561ce7-12f9-4047-b484-f78094c8cf37.json and https://artists.proofprofile.net/proofs/artist/bd561ce7-12f9-4047-b484-f78094c8cf37.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 0x0c0066c3e328ff5586feceaf87842d09403177eb5252c965500164f82117326a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:09:53Z), 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/SGB502326951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67963af8f0faae0a81b16890a933c1cef11b4aa34c28eeae235f10ceeebd867c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/SGB502347191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19579295697f7087bf7051c0859081df32bec0d1a7cae7c5affe7898b2e4ba46. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SGB502351650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d956410612f41ad58a0dae531a9fdfef60e7f4bedfeb77fc2e3db26dc90bef. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SGB502373007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533338acd11242c8a8937e097202e2f0a99c066e89f8d9d57f37ab03a97deb9e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SGB502375156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c447074c878ef1d13d593a10fae38fb2fba2bcff3d220fbfb847e2efbb61efd. 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/SGB502375184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48408a0674ae075adb99e6de1a837e0da0564936d12866370deead8c6a7d792. 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/SGW502351981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e381b1c690f3e0dc817d0405c72e61139919ca24149eb1cd4ea038c48e6b3eb. 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/SGW502351980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1816bc91c5edf05807e039791b9de1928623bfc40fdad066e3634e2e0b2054. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GXBAV2307754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21c0086158ddd9624b40d60769fbc1365c836da527caa03281d9bd30690e8c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GXD7G2478250.