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 0x99776ebc52a6099cba5e6ff0dff18e02a89122db6b611e6179828f0305846b3c. 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/d92840c3-7def-4cec-a5bd-cd164e44b390.json and https://artists.proofprofile.net/proofs/artist/d92840c3-7def-4cec-a5bd-cd164e44b390.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 0x5f95b0167dc66c7482044cb296a3f03fa0afd42d8bc55e110f7d0cf0ef238c6c. 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/ITDF62577002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6732d3d592a177f8d5e7b96d3ed3fbbe3547cb203c22920bfaba4b12a1e997a3. 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/ITDF62377048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ecb59847d3c6e9e97934d43d39411c289d7d400cba517d324555fac8afa51a. 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/ITDF62577003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a76e18a4badb8412d06d70c9b4f92bc7f28f245e465e93d0e76fac31d469d. 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/ITDF62377049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6514e89b835c68e09b74ce8a438423ad506724d42ead25a7b15de86460cdec. 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/ITDF62577005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe07e8c5c69e355c87a0a774dd564179d20c0bd481d21085a77edcd74e0ed9d. 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/ITDF62377050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967e39afa858d5caa0f2f75345997653378ba46bb68d4551f471d578a4d09ed5. 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/ITDF62577006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bfafa5298d6f0ee8e4a7ff5b8343cc4c4591a39855d3f471fe50e8ede9c389. 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/ITDF62377063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f1b07dbab560aa988ea45ae32dffd8db0955e49a3b0601c89a135336f0ebf4. 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/ITDF62577007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa9680152dd3b68674980d539ac5dcf0bb5bc035a6fc8259eb09c8f6977077. 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/ITDF62377052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db6d1e4907ff2978770d33765130686fdeee120ec7e4e247933f2cbf403f52. 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/ITDF62577008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de00cbfb84404fc08db98534a19c52cd2372b23e8b03cd7d98119f45d72a3ce. 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/ITDF62377041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c8a188793b2bf9b0ba16f9853e958b817b4a2cfdcbe9503fccc041fc85ddd3. 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/ITDF62577010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebc81491773c67ccd2acbfcb519822a8d6f66964ad837ff5f15c6a5723a9565. 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/ITDF62377126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0445c05ed24453aeb3b32e08db16229f199e66e1a14432eba71cfaad7925704. 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/ITDF62377053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d146fe0f7e90c2a64a514ab38ea11c20b295c00cbe4fbb15d053ddca2e444. 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/ITDF62377054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130b8d43f2494a7a139e3f056ed600e33102de14e034e86a5db9c93859c6f36f. 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/ITDF62377055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b46be967fbfebf12c214763859429a131500dd45d594dbc445bbc3ee0e8c8c. 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/ITDF62377056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe16013c8b52683ea8c4a68921d0c70b6414933a14fed3cff732dfca878a33d. 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/ITDF62377057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16894fa6e2bf7295de4da0079371ddc6954b9d608d68c2e973c824707215186f. 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/ITDF62377058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9f9bb2e0099ba66f0c166f26be77aa3d7bc9d7d99ae46beedf4fcb5057547f. 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/ITDF62377035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68ff5773edea0d12b3ef0ee65544859af90c0d9b406066bc72e4d05f481000. 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/ITDF62377059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab090d2e7339cda755c03a89b6eb62493bcbebd6770b88b5b5d0f6623b51298b. 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/ITDF62377060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7427fe362843c927cf17eaa231c4b23a80979636b442c671516e1041c864df2. 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/ITDF62377038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d7804c96c4f45bd5c628572f85e0015ec564462b7be9daf382c5e9c4502a3. 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/ITDF62377061.