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 0x29b733f365b95eaa2f84d722618390b8347488543f78249d5a282a5ed7faca1c. 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/7ec07edd-166b-4995-a1af-70caa3149140.json and https://artists.proofprofile.net/proofs/artist/7ec07edd-166b-4995-a1af-70caa3149140.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 0x71f77888bb704411512f01a732b26a7a2766685117bfba88dd4f9e0ca49aceb3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2380970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa70d4f029030c1aed33fd43f5987c9319dd289701094234b87cb8eb1416a17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEM2485758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25b7b76a06d3041368fd9cd8408090b847524fc0ca09393e071f14be32dd782. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPJ32197108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa70d4f029030c1aed33fd43f5987c9319dd289701094234b87cb8eb1416a17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEM2485758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4cbfb8f5e4afabeca0d52869e203650ab10d3eb4eee33056dcb1c9ff230e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYX2449305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802c9f7e893d85ff967e682eccdf28e8e96ad00fa891bd50956f8c76af3465ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBF2331343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123a918a42a51635e40bc3a6557334208eefd519f72713e3d7feaf6ec6a9b11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP52366992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e98bc122557772efab90b70141165fa8cadd5ee9bee84b1ec8258afb145a41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB52367070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22638d640e7157f2ffecadf409cb3d6f4a5b39f600b3f35d8c5bcf2b23bb87f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP42355065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840b133b4d2b5639fde875dfbf6dfc1952873c60f8955c125d53eb08d70e68b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB92395153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81ec30c3ae4a119f6f2d7b15d2935e6bef63100bc141c203032de58a829f3fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAU2320768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34d3c68f3d86f2326667edccc65629e08130646192a944cc7914c39899f0912. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2462813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8809468cc0a9f7ff24a1da91490ad549050435994727cabe99c583bbfc6992. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYZ2462814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24342711b2e028fd0894adfb3c64a3711390dd413e3b360a59950c764b7d5a68. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2462815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0aa7eef1feb26e5696c9ae897bff90c3841df7d137a26a8510272fb733c39f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2462816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c482438e1fe2c71e001a6ac6b1de346f141528f9c71afde831eb597c6e765. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2462817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bac417007a5fd124b73bbb05ca65eeca4df79c2fda8b474dee21c8a9436faa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYZ2462818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899b572d089cf64b23e2e53b4749561baa4df7ae2fe855d53ee3261a1d8f5020. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6N2440678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123a918a42a51635e40bc3a6557334208eefd519f72713e3d7feaf6ec6a9b11. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP52366992.