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 0xf6c87795ede53a2ff9c0f1d37ee87c80ea02f98d53ab4cc993cdfd6842df21cd. 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/84feb167-3ffc-4e58-9b5b-5e54cb046a9d.json and https://artists.proofprofile.net/proofs/artist/84feb167-3ffc-4e58-9b5b-5e54cb046a9d.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 0xb1a398bcc7857b586714367634a05ce155c751d2b26843b3434be8608f064a04. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBFFA1800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78314c14d04493842ae8d5d6be85fe53d0d7f9f4f98af532a01612f4d9d044e7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBFFA1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161cd354d2f5e16c4deac26e645a6389d5fda4419cc14db0adb823369055f97a. 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/UKVEY2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ef13f32b7df3ef24857dcdd2bec428490dd8f8f348de8fa6bf9f6b7c848aaf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UKVEY2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36d090d9a38273a5db04885356882a06b6113808774edf9caa5a91440bd6ba. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/UKVEY2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ea15e040adae12d68450c27d4ad14ac1c4f6fabe9dbd1854641cd0b21e982. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/UKVEY2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3871c068282aa994074442ddeaccf58e56629bf6dc63dd5301c09a6d474572dc. 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/UKVEY2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6969f90fed4e54982a2bac1c477cd13f184ab6e6bc75e4b9a1f129100587b1f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DGA082278927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a803fd50cd5a7f68a0dfa490ed590bff2c5a3639fae97aa17e36963a487fb. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX452323143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a2f37087eb9c25e480ac4f47de906508a6bce4946e8ff7b91a83ed36fe778c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR59R2324388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d30106f7bee085d7ead5f5187d3246ab8fe1b230e64c9fc1bb27902548bf1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRX452323145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6639512bb518773fb81e6be8b9ed5573a0f1273cc846370e4571aee70ac9a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX282348734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa999aeb72cc81b51546c798a6ad8e61b6f28a07c767fceb5028833395d0fa70f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FRX452323146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0ccfe496592fbed3aaa4067b296ef660af8c27c4ce9633813c424c6b1a4bb7. 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/FRX452323147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cce3604d8af7eceb75ced75eee70981f535594a8808538ac6ada3fd1d98a89. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA0T2423301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd35eff32d817bd6d369a6bc6f6cb979c6aa04fc93db14b9ba9c2e44160725. 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/FR2X42576314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cce3604d8af7eceb75ced75eee70981f535594a8808538ac6ada3fd1d98a89. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DGA0T2423301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cce3604d8af7eceb75ced75eee70981f535594a8808538ac6ada3fd1d98a89. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DGA0T2423301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd35eff32d817bd6d369a6bc6f6cb979c6aa04fc93db14b9ba9c2e44160725. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X42576314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ea02a5d96a0fc47cde9f1c236c1899a559c7a3537cfbe9b3cca172abfab326. 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/FRX202550243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22dee5e3e2d845112353d9106470fc30fdb2f6e32aedfcd212fc82442276c6. 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/FR96X2517824.