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 0x467679bae16373bea954f442066e4427eea53848c9c4804448f26f82bcf3ec4c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfb5ce2c-4e8b-49da-80af-0cc7fb2f41ac.json and https://artists.proofprofile.net/proofs/artist/bfb5ce2c-4e8b-49da-80af-0cc7fb2f41ac.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 0x697cedf154ac646c43d406ecc069cdfdffbf08164ad92f2ff94ff4f9d1fe3def. 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/UK74C2400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc504ee35ccee476c67fb8bf16b8275244d9fed52a0adce88fc4659f996e6aed4. 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/UK74C2400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a3454df3bec9fcfc6a2fd9823179549d328fed18cddda8303f84c3c9bfeab3. 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/UK74C2400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9087e057d637d2cc2b741081678e7d3899592c7655f135c5384815aaacc7ed03. 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/UK74C2400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503f08db7ba4869d0bfec9db1f35031d0bdd1796b6f8adaac26af6a1f72753a8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UK74C2400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962905041ec0db430f615ea4ac1e3da8fcdfe3397a7ad93ac8c8392a5fc68653. 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/UK74C2400606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd160d44940118f8dc807da3c3018b7a4076f0bd19554126ef6c3b27c81a19ae2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UK74C2400607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a96dc329df61539984c2853139560e6f5b369e06156dc1ee97b6516ad77464d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/UK74C2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd658284989b53ba68ab9a5d53be495fe8c18d958f4d7049683390d2331b3428f. 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/UK74C2400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0ab478194e0a4159ad6797a97713cd0d3c78a2ef8374b1302356d569b1f483. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/UK74C2400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722d897c14cc2a392d1e330899afaf0fb0246b96bef5ff1da897fb177e62633. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBM9P2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae2f0be972fe1c52027adbc8c9857512138fb4509b5eb1a2460eb613a94802. 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/GBM9P2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59365054efb2adbec82020f62fefab6b87f97a744a80be166c4b6729021ac1a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBM9P2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84902ee38c0ea52a4ca7aab50da61cf9adc32845daf4e6758b9dd999998d2c74. 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/GBM9P2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c29f4a0f9b5854c44d6da73bd0419f233a825b7d84b3b86556f99edf44684. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBM9P2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497d4cefca5e6e17d220b6cfb3cfe062f96a4662e324dd333ebe0adf526c8f2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBM9P2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb389d30686936b3f2efd54991b97c6334d7afac5b3ea333051879bfaa0a32baa. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBM9P2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7250520bd1f8232843f87a70d357dba9e025fb1ca28b64d0a2d0d4925ee5d942. 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/GBM9P2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b016875ea5f9724527afd89e4678a201a172035260e92daa026b924f11b550f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBM9P2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d2c51d763c6800ecc9c95500fa457f4b090a63159a31e8eee97fe65e79040d. 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/GB6EN1500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf109d5c71c3da77ad960369fa9fba2766011f65d7de6c521a87ae72356077ec0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB6EN1500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924f8fe739b92f35c25b8de46d1767eee32fe8e1c1d8f40f8ecb47069635fd2b. 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/GB6EN1500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc03f914ad7c6749afdb984e6770936b7b4811fd6f09e1a8674a15e8604347. 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/GB6EN0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171fadfc6c9f09a56b9fcfa4044618ad7a139149c63c5836fd6143ae76990fb. 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/GB6EN0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fa5c0e671628d049de0ae44de59e2ab1bff3af421d2c632572175f3ddd943f. 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/GB6EN0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f5028e46e4607970ee72e3479ff41b42e1a2a12783d425f41e369646fa6bc. 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/GB6EN1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe4ddb4a779b16379772a30ace921d67676f925a9cfc6d80668baa042e68b0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB6EN1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb163f5fca260e5955a791a0e12ce2dc00d0e0c0d5af86695fdd4ea21aab0ef3. 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/GBM9P1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b39fa5fb2feeb1b12035d1143774e1d93f624de57e7ee9162d5c5132299a1. 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/GBM9P1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec9b6459fa59db6d8c8599b7460d6a2d578e32e59b3cce94111f7216486731d. 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/GBM9P1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d7d8122b789aebe926c9db37708c862edfa5cd6f34009dd7ab47ca040ad71e. 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/GBM9P1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a99cc476825ac69502eece101493f81aa4d1f707738584d708c88d82bf3140. 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/GBM9P1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b247b695b20073845047c6ac7d9f5c5c99e229d0f4cebda33967a1d5f26201. 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/GBM9P1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ffd51a46ec69382c1af84882c50326e3a0eb0b7dfc74d472dad722da4e5051. 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/GBM9P1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a35c74a42d3558f17690cca9e5c8a06d5879544dc6f4bbabcb6d214e7144bf. 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/GBM9P1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4267653de41774464d8c1f5693fe1728b6548edba22c731b77c4936f3879954. 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/GBM9P1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62359af9ae42e75fe81ccd20d54e10c4b0b65977421aeb436ea1db5b490ddb5e. 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/GBM9P1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6671f49ac039caf457bbdeea41b544e3c24518c61d3070d7ee0dbdbefb039162. 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/GBBDY1538601.