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 0xbf333436b892e651f0492c584b472a332f879b9a47869a945ee4d9befd9d91d8. 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/b55da4ff-d2ae-4476-8339-3b135bec0afe.json and https://artists.proofprofile.net/proofs/artist/b55da4ff-d2ae-4476-8339-3b135bec0afe.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 0xbe11015a44f4247612b0abe7522cdd3e5fc493f8993bb1128042d4e70b6cd43c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3EX2522682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036e9be2eaf2867f704aaa4f4202067252cdf0380a1fc087f6b3caa17457bdea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EX2522679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454446b6d595c51151d466e4b0cca414b26c59907de0c1e6ca49205e3fbb1777. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:09:51Z), 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/QT3EX2522659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb369b5d488d9588193442fbcf4bfd64afae3b32933db47ce1cab59520fb73. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EX2578777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec246d4dce58ec5dbfd0096478d478d1e1699baa720509357e2014177945463c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EX2584416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af9d91444714e52a10f1adca5f9cad0a2b1a56b16ed2b9dcf1a995f38748814. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:52:15Z), 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/QT3EX2584433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412d0a2f837c5fae8e1f86af29ce31b30b0509b84867a1c9fa4629ecda0b1119. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EX2584430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6360239d673686c6e6465129b5c51155279580fb39b36d4cfb1127ef81cb11. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:38Z), 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/QT3EY2519544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51468e6185ee0b555c3f9d854f61d463dc9697583c81c4e7ade4b3e653c99377. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EY2513895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b32e7e86e1907089d93df1219d83b807ee65bfee3ad68a618ab981765022b19. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F22591386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa602a35e2598ac429aa1a63d8e5e681baee0219c54a030a0ebd4ab2ee51bdb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3EZ2557729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ef6de89bef91a80fa401154999e37178a6f441924ed82e8fde7b141d304f7. 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/QT3F32550122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f7a6c6968a742f1fb15cf72d9dcc8ac79c20c69c8214f5a952a85b450c091. 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/QT3F32550120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3c4c3a5f49d761128be08d4efe3b889de852448dc7929c11ae2f283a689749. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:56Z), 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/QT3F32553019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525c0563eaab6608c724c552d67895fe805c34de5815096a2982d42b979872cc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:18Z), 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/QT3F32550119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada8a9875ed6efadfced84b0ace269c15ec562a88e5254de61b7898b5619f23e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QT3F32550124.