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 0x8891a1fe57aec93d4f7233780533ddbc3f3833136ed91e6ff676f3ab9c29022b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9206725-23d2-46cb-9950-1404b475e2ca.json and https://artists.proofprofile.net/proofs/artist/a9206725-23d2-46cb-9950-1404b475e2ca.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 0x37683c4e466d31ddfbf27ae9c07e41586b79864c327a502749d2b23f76764377. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZES52347179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0011d10f350b24eb4e6123886a7c9954e1c4648eb2c1d3c5514a78486819459d. 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/AUGBT2303463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338ef03d5c7d4b3bf08ba9eccd96e8ddfcd7f49431b740573565b7aad461bce. 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/AUGBT2303469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fee4f7bf7adea2ae57d53a204cc0ba2e524b5d73f40f00e81efa1687c92f261. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/AUGBT2303451.
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 0x3c7ce304c4217530849c46307002cea4ee8020508d5632e10b12ccfcd5c3f7cf. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/AUGBT2303466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3434c1d0f786b0a7f36fcf0cb00c8bbc57642b9a70a110ae3bd16311e4cc0c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/AUGBT2303467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2b71ed4456604aed810c7d3a92c4e4d48530c435f6ee39baf19e4280fedda6. 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/AUGBT2303013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55209abda9b8e8017706e4128eeec13544afe52624c6d6235ab18f361bae9880. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUGBT2303021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a3b4ee954f4076182721b9ae112a22b4a066f8173b93e1c3c25e6e7d6cc9cc. 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/AUGBT2343189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b4c31b5495b239a2700df10f92b225c433e7cb8c975364b216495093450ea3. 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/AUGBT2343190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd545d37c2bd4620dff343e0f4b4b5bd0842e2f2721ca31193318079d28cc4505. 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/AUGBT2343200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cee351f38c24c10d55736cff02bb669710c5fd8b11c6133b69ef5503de7311. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/AUGBT2343192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c980ec2166da6664d5508b6bde8871e07e292d63d0271e98bbdd125dc89022. 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/USHM82464087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadff7d4c7e95256fd07c43f624769dfc1bfd10711d88339660b660805fdddc16. 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/USHM82464088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ed0c30aa1f562ce57ec655e5c80a9a25293cea4968ca8a0453bd8989c738e1. 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/USHM82464089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3362043e59335c31d9a674cf3419507723369b82ab39b0fad645b9c185cf542. 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/USHM82464090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9dddb91931840929dab819f5fe980053ee8a32974753b8c2ed84a9ce4c881c. 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/USHM82464091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaeb728e06b5d0873fc6c9b6d158201852a040116b5a61586c28198a85cab67. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USHM82464092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e71c577651576ae33d40007987ffd3295fca0e238d5fa805f308623b15ccc5a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM82464093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b824b083df9fc585464b725814875bcc2eafb8938f860b13001c05edcadc4f. 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/USHM92453698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc3c3cfff738cd86787f030e08af41c1ab70485b4da040c49e16167feb3f7f1. 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/USCGH2525431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0926b5aa2e600a0547c83d585abf5b8e0a7d5a2334eff083ad1f1e7413fb3. 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/USHM82471290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b51bbe973ad9f7ecac6ce823fb393e11a817cc1d3561cb8717f77b1d3004c4a. 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/USL4Q2444913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a6d8daedba220c914b7fe99cdb0dca3b24a8bb46c914bc0df5f5dd32e42afb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USDY42486736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6ef538ca0839e791c708ff485a643545297b21e4b8798653ae6b225a615556. 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/USDY42486737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e3d583062e2349102b13582ee7d1ac9161c51e106662f82028459a7339f246. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:40:58Z), 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/USHM82471288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a28a3e1f5a9b0fb8c9ef6af1e3dca0f0e7c1c04cfdfa2a68c3973401382a14. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM82471289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ea1cff9eca991d412d759db0682e5dd9e3b9eca1412da6e8496cf824c9d873. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM82471291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae221f1aa4dd07ccb6cdd6fe62b746e383a463ff68f647ad8cf9757f30a41a1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM82471292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe387aae0872889d7e85baf836a441d0c09501edcb9a77a09dd791f1ea1a44fbe. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM82471293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14c3f254af2bcb3bfe35264c212e878ce1de8a581aa2841b902d1864acd9ea. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM82471294.