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 0x1fd395298922a592ce4f26d91511089d70997c1cb6159526bce7a973199b1cc7. 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/e06a9418-987d-476c-9715-2b0e838cca1c.json and https://artists.proofprofile.net/proofs/artist/e06a9418-987d-476c-9715-2b0e838cca1c.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 0xd32de551dbe981274517346eb201151d75e89d0639828f701f7bf7eb59b675cc. 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/DEY471880616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958915717bc9d7a4468bb260eaad3f12a83be55e30e3dca8525dd7dc696f4d3a. 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/DEY471880617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5652abeda04e31cfc1f777656806eee86802c553760955858648f5114d8a3c2. 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/DEY471880618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c68946f0abdf72846ffcf0a6aa179f54ad8af0f7a30f78cc6f9be245f341bc. 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/DEY471880619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb81359e3479cb5110d91904f857333cb7bc550808e709902e3542645d4b9b3. 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/DEY471880620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fb6b30a72c16e2e5b4647507aaa57656c4ae811460337c58cfc67f38a00d67. 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/DEY471880627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2917624639da66b291526a14dca32fcef344243e490f99eb84b81375dc15b6. 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/USQY51438382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd60a05a8404daa029d62d665a055efeba9119af66df085e08ad624967174078. 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/USQY51438383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be76ca25d91d3698163cc13193da691ce9572eaedfd87cf05fc4f4eba1c8ae. 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/USQY51438384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cdc057004b28c246131971d9c7a8c760b23087ef143b4940aa6a9c6bdf1042. 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/USQY51438385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836aee398fa89c5c09a960b33e61ab1cd7bd15554a2095dcb13b8b9e79ce632. 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/USQY51438386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5fa62e5f4ae7ac230676a8018c69ccc8cef4ed6c0037147e699172cdf7221f. 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/USQY51438387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfca698dd69dd58cda9ddc883f525a84b2247333e11eb87e81dbe4a02e23fdb. 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/USQY51438389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77678ac81016d2a397871855bf6f4d76e20efc0a03aa51c3a751113d2992a35c. 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/USQY51438390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d2f934bfffef01e836501eac3257d92412c59dd23fbedf37d87bda70ff0033. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USQY51438391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5beabe88b845b56e73020e44aa3d88e8426f5c90ecb2ee6be7935bd8cf1184. 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/USQY51438392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac4518071c3a12665de0f117d90ec15f4e20bfdb2beb469538d7af8e52d04b. 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/USQY51438393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd3646472f945fae87946ae7f9832efc3e640ba2e72d24236d2366773fa94e. 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/USQY51438394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a77c79cc972f53923020db4fb936af9c164e8354e780eae7a216b0aa985550d. 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/QMWN41100011.
Tell Me (Lil'T Tello Me How You Feel Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ee28e8a56cb7b846ee7fa374e26d70bd452ae597e7e77db46844624fad4fc2. 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/GBKQU2064824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672fd0f2c42d48e0b629a752ae2ec3fbe11345369faf803b9ee63054bb3b70f6. 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/DEY471880300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47fb75a9f17894371b8421b7b8b27c6ad1878fe7ed81db24645fb94ab296d3e. 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/DEY471880301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372076a9ab6fed6b7cefb2ea4909007d414485d137d3ad06e312987879df3fd9. 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/QM2SY1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b8b3b9fcf0c741fbf8c445d7f787a73ce94809d25eed03d7f7be69a71e84b7. 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/BR6BY1300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107c142c432d2260e1e7bfee22820cb9c31c4486cffff3d12fc0ac9203544aeb. 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/BR6BY1300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaf2eba63e83a4312d099a6b580baf943d83b7346be522feca8e5603b4beeb5. 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/DEU671200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0649e9b59949ce9720f770886cf967b3f3948590dfb14311ec18b2750b472c55. 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/DECY51119182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff452e01468cb0d87bd515b5fd7cbc8586b33b644674b163eaf94a3a0cb3cbc. 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/DECY51119183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422548e37d737366ad3b5bb8c8abf9ade51c07b586c98fe780534c01e8289026. 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/DEU671102225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46854919723d48d40d7d077a06718f4883fbc79175e8cf85c2530d0a9fdb5f39. 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/DEU671102226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb673f9a7f8fd1065d3f42af7ffadbc1c36447d1686e7fc5f36b36787d1fc6292. 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/DEU671102227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57930d218d0c46d48ed8166e55c32d20184fb3fc51e54d5d956c0c0b3ed3410e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU671102228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e82ce0ebe2727d7881e84c34f69aa3604855e7c8d995554fe36a3773097eb2. 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/DEU671102229.