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 0xcb695d2696dafffb8c7d4006d4dcb976209952edadb0dc2fd701d27690556355. 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/15a70940-d842-42fb-bfda-e6659854f9a2.json and https://artists.proofprofile.net/proofs/artist/15a70940-d842-42fb-bfda-e6659854f9a2.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 0x7e519a5822adbe4fcd33fa3f6e57b2fdc22fff3339652a4e1a90647e365b57a8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBJGV0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248e3e22f6f85b45cc783f3ce500b446a5aed2179277fab388eeb8c2dd03c7b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBJGV0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7143c1b29ef0595eb16f9bcc1812cdb9955ef81dbcb2a1b02dbf66bf2efb8b08. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GBJGV0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a4fd479a0bbe1ee140f5c51248e5e648a218adf1e969d5a6c53036bbd7e50. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBJGV1000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c95ca68114a2e66387a2bb3db201b5fff5500f65e261240ea442b0c13e2648. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBJGV1000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d4dd33e876b87bb57a9c55e3be8431dd6814a4d19bf37e3f173a7fbeed9846. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBJGV1000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a31fc42a2170f015489fb07a5d4b16081c0cb342d642944286bd93cec8857fe. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBJGV1000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b53373f6cc48eff4d1b87497480a002656c19812cdd74bcc2a6a8fd70b604. 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/GBLLT2145463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d8951695156c20164684f7e87493c8e7bd3742be043c3f10eb72685457cac1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBLLT2145464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fddd0e2ef9714853d5479904bc5e0f6ff5c521b46f1c0eeb28dbd268283800. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLLT2145465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc77da01365a8bdf0fd5bd25be9c2c42f8d0a9b22b6e02d29e302f9cdd3a8780. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/GBLLT2145467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16d25f0651466ce7eb2141aeb861c2d4e240ff91252ddc7cd0e1824ab5a267. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBLLT2145468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bece272dd966869f49e1d3b96f2dbfa544677ccd602ac427fbce2f0445a8220. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLLT2145469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a49c76166a48345e2e7a6c0af3863feadeb92e9663141a3657784d7299e1fa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZRP52431959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0f62029d536fc1430c154369977687727c2d6e2e944c894fd8c0225e642dac. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USLS51955006.