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 0x98a53421d5aeae3902aed1754bad4059e4f9a913e4d9a85025eb37e020aaf7bb. 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/1511409f-ead7-4669-a280-9226a78b1d8c.json and https://artists.proofprofile.net/proofs/artist/1511409f-ead7-4669-a280-9226a78b1d8c.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 0x7af4577889bc8366cd086ffa90a451d5b7d8e70ad9fe1c34abfb9a38c133b958. 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/USACX2200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd0010cadc2a5d309d45dbe5fcb53108dc6d8446f057e4820ce3909e67c122. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USACX2200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c22eb5e3abef286fe197494d0346a0f7e20c7664fc05ea2860ef1cc61f6e80. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USACX2200517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a83211c9a1b67e271da4e219acd286df666f4780d9c80ebc3e6534437047d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACX2200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ba694eb54004bbdf80106557a380a99ffdf51fabc92670a5871d82579dd8ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACX2200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccceae4742b27a84b12c27a63f4972594c233d2b8e0c3fdcf514b5929c91691. 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/USACX1900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cce5a71765dd2ca9e697c18c13e1e86485c0521cc96dacd0fb49d78bd8a8c0. 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/USACX1900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7597d68e2f228b0691350e4b03275a0c58a0db0bac74aa5748841d9a9c6c48a3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USACX1900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f729cd65cded682c034bc9736b7720b2bfd43a9cca3fb8037149f0f5e7341. 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/USACX1900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb8be6ab3a495bc323a07c2829fcb813c394ad158810b89198785cd11238961. 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/USACX1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe796cb2b49f8446135f9aa4bfd5a84813ad2b49c754d739e0cc5c2566f94cd26. 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/USACX1900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b37a8b8e36d3a30d9aee5d70afa2e648630f1ceb47f51e682dc2c1768b2917. 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/USACX2300564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a25fc1f7de263830f88c43e7d02948d645cef96e4374e5640475621de9b55a. 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/USACX2300513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f1e153441f72252ca2a44a81e803378cf36f2bfc391503a86a51ee9e5835a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USACX2300359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c22df17e7304450a34380cf9dd0cdf27fbfc1517b2e3ae2988bdc115ab23671. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USACX2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf073937c19cbd7e71e474fe0303247c29bb781a74f65f8790f3a849331ce9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USACX2300419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7e2f2fb516c877b78194d354683251a773fd9621ba91ae47255359a7b04b2. 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/USACX2300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f16daeaceb5c4fce0ad914c5b731c7b1534fa29567331ceb26262ff7aa2476. 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/USACX2300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd0010cadc2a5d309d45dbe5fcb53108dc6d8446f057e4820ce3909e67c122. 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/USACX2200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a83211c9a1b67e271da4e219acd286df666f4780d9c80ebc3e6534437047d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USACX2200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af4577889bc8366cd086ffa90a451d5b7d8e70ad9fe1c34abfb9a38c133b958. 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/USACX2200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e48c3b131726207a9a77f1fae0d69c161e4d205b328235023d5ce61cafa762. 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/USACX2002135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e289c3eeb9527436cdf2fb3a73ed2ddecc2f4a012bfdee7645c0cc78a9c0e4. 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/USACX2001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267bc99087db1e1830e58b92cf4c8273f63b16ab537f62d2b088696f9576a536. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USACX1900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93033b17ea7b065f5ce6b90154bb7fab868b67019a80f595195755141a8677c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USACX1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69800104070662731843620a141ea2f011c675e715b0c65ffc9df58ff464aae3. 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/USACX1900122.