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 0x876431db9449372e1195f83962c5dde1fd3d141fe326fd2e554e3af3746fe337. 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/4d7c65fc-7f1a-44bd-b3fc-17a94cad3124.json and https://artists.proofprofile.net/proofs/artist/4d7c65fc-7f1a-44bd-b3fc-17a94cad3124.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 0xfa4729b7368de1e47409bb5bd33149f80d86e5b6bb7b3bf463c54ac1225667a5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN61952003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0cdea02b605297dbd88ac1b5bfc807808aa737c64f8aa57d638f4290050233. 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/QZK6Q1928416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c116bbc06304c5f7b02f36309e6c53604c7b92852382024e9b711b884c1b5f8. 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/QZHNA2030482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f85758362cc77b07281ec99765bf7224494f64c82ecb7583893b38be73da44. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA42243420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc60167e4fdad58885604047637fcd19ac2f344f8685d54b86afc74d286fd91. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42352706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b688144fe7806330e4efbfabfcda2f48c5e00b1fe41490f7e94a188576a6757. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZRP52396951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1169d6cfb74a4e3204493e73f9db883b2ea26ddc1b2aeee41c755f47b8c3ba2d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZRP52396957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e9953ff3918adf168904d08bf7d74b36c10973c27a4254fa0efaae954f0e90. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ42427219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eecb8154e7ae3269c05877e3151ab4f0dc1d4fc472b583f47c911b585f135b. 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/QZFZ42427221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dae99502c9735c5161eb323c7794163de0e22cc2e27da2eedb6ddd403e59e31. 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/QZFZ42427223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ae9517bd7734f5bce89044f52bbfcaf919d105bc768b9bc13e478adfdb8b3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:08:51Z), 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/QZFZ42427224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceff6d8e5ca9aa777d757a410dffb61f4de7db22e46d427f76481fe6ffd2a01. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZK6K2433121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c4ef961fd8d08faaadb3a3de9f8dfd3ad0f99a13fa54e8d5557bde852463f2. 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/QZNWZ2423072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d472196930c4feaa41589adc2d88d6921a26670ad67b78bfdf6898bc6d49096. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ792435430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9886385d94bc3ee7e4e1c92f571b0c542c6c6b4d6679c38a228111bf1dbfaf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32541136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5475d6d2237b154adb52e8a4fd281a6b6b7df7e9338f550d809d0dd68b4273bd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB92569906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76f21e68989cdaf127807abeea34486c3300390b12dcb9850c7e3420e429fb0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFJ2582527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290d5cec413a33152189f3ba3415b50cbde8f7aac84d32fb645eba7bddf4b2d2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFW2514783.