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 0xce41e08db4f3efd17c4be745a5d8b506dac06aebe9a8c68f9af3545bcfae1797. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e200657-1c5f-44c4-b733-17d5bca067fb.json and https://artists.proofprofile.net/proofs/artist/3e200657-1c5f-44c4-b733-17d5bca067fb.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 0x03c271fc244791d928ec4a713c03e1bd5fbcf7e4bd5898993e152e7ca16a6d2b. 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/QZR422104721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc027dab750d2dc9c2531f465767583a4084e149b3a4cb623ef6588ea2a96c98. 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/DEX261900753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb61f7f10ea9eb74c35ddc666147e9e4a28dd1de418e6cbdbd0e89c77e509601. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEX261900754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf8bda76057e29b9e220330427ec9a06b5265127a6c105299946a82311af6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX262000797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30bd799b6e6b08e27cf8bac08746841de768eab5c69e0e588c371ec6230fa1d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEX262000799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f804e322b85100ba2e077205284c18858e3ef1c2d35fe8b7c0e1dfcc78560a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEX262000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae39473ddd34f65132d52be2300d823d25a9ba53ee0ddc37eb99d86f1b796152. 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/DEX262000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c840481c46f0e530e92fbec919f00ee076b28dec81ebb25cd32ad0e2d2c6dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX262000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696dbfa4fad1976e1d75e88dbbef9e125f15da5095cad208bd336ee009f6a70f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX262000811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494dc40b2d91a5858985c935d06adb0dc9c94702d2f591957e3947d9e680bdcd. 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/DEX262000820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef06ad2864000a03e6d9cc18594b809a85f759e781a4fa0a3ad602d5550eb43. 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/DEX262000822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fc8e74ec651044e5aa9c85f89a2f1eabfd1f315ea14044d18a204e24a49f9d. 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/DEX262000828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8c29bceab6c81e1a84d5cc0c06060c4abcd495f4a15f17fd9418990afa2af. 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/USA2B1602061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0407bc607d246c5356dbe787873ef82d7da26fa84dbcb41b20d8f33b7fa9e5cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2415321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ebb98dac3685ea2477a7f7dc3896e01468cd571db7fb8ecc35f459a885cc20. 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/QZR422104716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9772973f9df5aec6c2192f317588bb4d5b9890683037d60361a28534606936f7. 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/QZR422104720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3065a6c0e85252dbbfb725a80974d26734fe3e5135702528943acff76a4d06. 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/QZR422104722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171c57975a1cd5b4f3dcc98132885b77d6eeff5149e1b07090e2a537b056044. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZR422104723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8bbce56a861621aa852630f901e0a81e442c7a595be5540f336e57a2a29c7. 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/QZR422104725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7ef87e94a1380682ff9be0cd35679ccc1311908bd12d9b2450b3e66da2628e. 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/GBBPW1500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec4e6adf561f8ea83a0e1376481b9d442f090a0ffab292feaa53a8af158a300. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBPW1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb058a58d2088d7a58051e6ccf3a39f1b365982044239bdac0e5a0f0fbf2d03. 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/GBBPW1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8785d99603bc9d4b63ae5354f93289566a42d1d29f3f3c0c892392a0703356b2. 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/DEX262100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b53b52788ed85b6c20cd185156e3ad1b5cd62c8baf7f8804847b23e299ec1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEX262100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeddc6d192d65e4b7a33971d16421e6a49dd3e52b676017284db2b479c42f6f. 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/ES71G2505037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0020066e67bfb739b2ebdf34da8a3978c7630a4f66d1214df4814d9f7d3a0829. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ES71G2505036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4c3d3f284570104a49f5915d6255ef36869273f8c13fc7eb9908ab0a9e8bf. 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/USYBL1301351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fa9d9a50c171c2525d2b1af13c1b331cd85aa814db3c80d7517aa28a8c9e08. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USYBL1301348.