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 0xaf51266fd544d6be876c29f825f6db9a5816d3c23f20f7169feba834d7d50689. 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/35be4238-ba43-4404-ad2b-aa50d1935633.json and https://artists.proofprofile.net/proofs/artist/35be4238-ba43-4404-ad2b-aa50d1935633.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 0x8ec1d95e25ce1f7061600e73dfc078fb771a2f07355541a5704c745aec9bf211. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USA2P1499695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4770cc6f4f8cecfe8d520cb0a08424a05e85a89771fc4ca3d7c37bbec972c4. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ZA56E1402268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf963a8379ebda8230c41f2614ec5262b7c1101eb8e8f28ab2e7c7128cff04d0e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ZA56E1402270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635bd59bb53ec5d6ad49e046e28429f0bb8cffdbfc746b48824d86f263ce737f. 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/ZA56E1402256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e839a1b95ac10edad0362aa1f986d8c1f89f58c5cfc0c9e9818a66df9fd05e. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/ZA56E1402258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdeccbe1ba45b40b94148c29e37ef6d900b0feb31ceffcb2e3cbf784fb48db3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZA56E1402259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2668aebf24a90fa0d54f74274e6705f632fc98372fb4e95f7b7ae78d072fdea1. 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/ZA56E1402263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3e5bbebaf8974018c2a1b2976570566788b05b9bea819a1b0b9632b884594a. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/ZA56E1403120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad57256f2617e3fb18bfee6e87f55f13fcaf33ceb4376554dc4708a970606f8. 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/ZA56E1403122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67218ce176f4db0d851e624c24614f73013945a1ed6b3b07981464df7a56b8ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZA56E1403124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc607935bb87e80c10f4af0165711e86410d756ecc57a9d8531e734747e6844f9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZA56E1403125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e5d48078a73c0011c6ecc55c2061311fe00defc91163052864c5505fab306. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZA56E1403126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3cccfc30cd72252eb2e0440f6d2ea1beb0bf7fdd2f683815e7b6f033ca575c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZA56E1403131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb581565be795d409f0680ceec839accd3920aa3795bb83ef898694ae225e719a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/ZA56E1402091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aacff608274b66493ad7b0c6f1057005c914f2a21d45ab54916ac5954fcff5a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ZA56E1402093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe256299339a4c0d7bceb629879a38ce3d9b0effc26cc433ee2dcbe8104f1bdb2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZA56E1402103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf4b85261e740047f3349482562d7182721a0cb192d168ccd5288965f873a2c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAIK2487869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78561c836b3de94c71b97098036f9dfddd8db1dc860a4e7b02e3dfa3fd3ee53b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAIK2487886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc0c4644f9a57c045d5143989cd8441bb7a94eb35d958864124e1d2fd57f7db. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAIK2487933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933dcbb7b8591cab47a5bda673ca3d9e36eb01c07d48b8cb135287c9661ef27. 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/TCAIK2487997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3700bfd1cad6722e8c70e5b7bc85273febee1c674ca0123df20a27ae2754f1c6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAIK2488028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72f1f3d9591e52b64b8030f400a57638a39abae5bdf755d93969c2dbd3a58d0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAIK2488047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71074cd987274ab1d4fa0fef01ce99100c4291500559ba004e81a1ffa455b68. 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/TCAFW2171406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a48a33232a8499f0366402cf72c082b746366a977407db52e7c7e59555330a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFW2171336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da62dad786a4a00cbf931390b6635da9a8075fac155f465affa07af2e98c75. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAFW2171344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a70238c05bc477a4e23146fde4776e76f1b4a1f3bce1d5593fbb3d00dcf89a7. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/ZA56E1405517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5938ffba9e58bc3dc3b03a8a8fdc541d33c1ef1243818401327ddc44e11e429. 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/ZAR251800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a2c30c422e672433e1613ad574b4aaae8b26de962eded6e269133bbe264f3. 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/ZAR251800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c39e60650f6ed02274b733afa5df167ae9358c75a96b9a88818c0cb0bf444a. 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/ZA40S2401980.