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 0xd74226a18fb8536448d896598df39590b6d1e7fcab41e0039899e1add3156634. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd55abf-eacf-4443-977c-a2eb62219fdf.json and https://artists.proofprofile.net/proofs/artist/ebd55abf-eacf-4443-977c-a2eb62219fdf.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 0xf5cb21b7c1d1ca97f45d027ed1d914d6e8608f15cdc72c2e9760dc87cd3eaf80. 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/QZFZ52040743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49fd89c008ec15e6e99262f1f5c54ff08993b7271f72c03b409644cde7ca6e4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES62044893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5d653dab1d8f4dac2b87523a4cd815fb3099c27dc1775b3a11d513bc129a2b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:29Z), 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/QZK6N2063322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fedbf12a64423e57fa08c152392ffb7922033affb62d51ea7f2a9409191dce. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:00Z), 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/QZNWS2072975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526e4aa52f182980b35fa8d8a097d4a7cb203e5995e028c3d9d4dab31dc844b9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN32110420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac3f444a75c70cbf00d97252319c00ce5a19c0f04b407ddc1d3af392a2cf94c. 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/QZHN32110422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25483746e2ec6014832858afeb2b00f06fa79392648f382f5eb97ba7d052ce19. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN32110423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f352b38872ecccbc9dd48af5d8ecf663ca150aa71bd4bbb75350455268f5b4e. 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/QZHN32110424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b4bf08019acd8cb9d8b9b9420052924f5de1b5b0dedcc3604e15c67874e25a. 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/QZHN32110425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d2a5e82379d46477dc269bb522a276ef42edc9a1498a06f8fb7a14265ac57c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN32110426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ced6b95216fa92ac46208a4931425c94f5e91fc8a5922434fbf438e3fd07dcf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN32110421.
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 0xefc82beb15966f154f917bb8a7115820d3942f136eaaa5ff85f06c92088e04e0. 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/QZDA42281020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c65c8bc9fe693dae8dcc84fa93ab9fc6393900d8ed08332371cabbaa951f019. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42281021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea6ff693ef0fff19216ae565ea4426c59a96ea6cf356c1bcfaff45d032c36ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42281022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724d8c9f6a573a7281bc8087acde70766adb38800042154fe234f1e1df06094a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42281023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13deb31b674c9eee1919f6b2d5617695d6d081dd92627aa51fd75e367607af96. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42281024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db06711d2c024ce1679f299093445525d9c13e99643080b5c29271a4aee6ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42281025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5411e6d271b553a86a164ec955c13dfbbf57e2ca12ef672424ec3fae73a761. 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/QZDA42281026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19160ce8d6e2eb9f38c79faeea10f5eaf5f30b619175488193aa1eeae7f3cc83. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42281027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b2060c58276f44a43f200bb457d8af7c04f7ea809d510ff0c20995af1f761. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWV2202628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31226c23a9a4c60f424eddb3e8560e52bf6576e1b62a3a9d5ca43645349e8859. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTBB2322480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7f969c15baa7280c0e577bb5994e7e12e2974a6263e065f158ff5a7b735ed2. 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/QZTBB2322483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c0c607a0e1fe23bf33a20b279612bebeaaa638ffca85f0413943e6f5de734d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTBB2322487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd302f55e1c8091a7b32bb34f20ae63baf60b8cb52816495c17922f66020cda53. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:34:27Z), 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/QZTBB2322488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca960a958e33adc209340fc7ae7843d96d3f8537500eafe19d2c3c0739853d9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:22Z), 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/QZTBB2322490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612c83b920ecd2d0d4363867d2c99a4722019458192214ba650de0b8be3b0b6c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:45:25Z), 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/QZTBB2322491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd4681dc51b572622aea6ab7957e44237f33a787c7c8edc71d07d5cb872e88b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:24:10Z), 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/QZTBB2322492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490477f39d1b74165436fc1b1a8c4d9dede7248160c89b89dcec0226ec37510b. 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/QZGLS2330583.