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 0x229e5943a4605937ff725e77540b25d7838fa2cbde75abd0b92a0741e551c72d. 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/42af922f-51b0-4e99-9777-68d83134d981.json and https://artists.proofprofile.net/proofs/artist/42af922f-51b0-4e99-9777-68d83134d981.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 0x2c8aac3369a62114bf86feee9591d9d664cadc0e7c60b8eeaac61dc9e5036dc6. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/SE6XX2137809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6989724b86b548e21adb0763f8037f71dcf20b98097eb6ec4a9cd8ae4ebc9c45. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE6I32273886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69516cf94fec4dc8250385d2193e5a1496d0519dad2ca99dc84ca0019e5570d6. 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/SE6I32280568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5136f496465df179bb39cdf14c2ae7d0ebcbcc4747f54166c9fcea1e2131be0e. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/SE6I32280606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295cb6792a1a6864ac1ed3ed9fefa511df8355e03989b1ee0adb0b29eaef85fb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SE6I32272665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ce36b56870f78bf96244e3847e5782aa4baa8fc53a6fd98f1e9945ce84962a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6I32289962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5b2aacd1e08222018877e203293c4f9c6a0e966fd1b41b874fca29cde0b7d8. 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/SE6I32273511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0ea6f926fb1d3e74e362f245c3d27d1ef94b986c6d3b0571d59f17980b9741. 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/SE6I32280577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e4ca124381eed583efb12c0a722dee81bf53df03d33c9f0a585df32b9b990. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE6I32272695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839d5a7fdd402c81b746662469859fdcc4f62cb2a3d4a3fba45b807634b6c8ec. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6I32293331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d073c647a5b688ea5574ef57830af2329402cf573bbfce00097eee5903ffc6. 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/SE6QE2215946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d7e6d5a2adf50cded78b7ab3755ddf99dbb6953c42fbba4ffd679fe025de7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SE6QE2221055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a2d6d22781eae84d4b9f6e2d47602288139f0ddb147164c39429acf3653f61. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6SA2298805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f0bc45f37383541717fa35cc290f9a2ec5ef6cfc6bf3195bbe30c023d40eb0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XW2225469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5dfc5ba6e964f1884bb1991811e1929584ec441f90506151e0c258ca80f992. 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/SE6XY2204184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6e45283fea786a00b22e68fd47aa993863d3453fc8254dea5c6392204057bf. 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/SE6XX2560327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7e6ff3ceb04fb5c70c67babcd74eef04c615a833a4a6c85e4dcca6b4e5e3b8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6XW2504329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798eb845df6c410adeabb2bad3236e1528999aa1ec1dc4da53e5961532281557. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE6QE2519960.