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 0x70435608f11ba03a05fb333b01269f99c470cc7eadb9382457f48799b0e8671b. 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/903b83b5-4cea-42cd-b7e1-bc3c7347df46.json and https://artists.proofprofile.net/proofs/artist/903b83b5-4cea-42cd-b7e1-bc3c7347df46.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 0x48f22245f6cdcc0c543b60baf62d81ab9d42b5e103fcc17f456b5492cb426278. 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/ATE902300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d80a3c0a85e448275da59b46ef9963910486d9aaa3dcdc357dfb81b116bde52. 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/ATE902300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3be3b9df6c816b056975d380b71bf25964dc4e3d7f1214416ba470266902c12. 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/ATE902300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84129e874f3f3a6accbb20a0b7c8467c27281acba50b5e9c742354ee2a1ad4cb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATE902300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e40edd91ac5d03ea6a22a27ce02c17aa229b1825cc753e55a98aae4deebf19. 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/ATE902300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57626df9f15d38b15eadc4c7ef1a1bd25227e261aee5637243328ac478574426. 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/ATE902300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382e85f257c296a6f745c01bbce4069ff577394e33f9f1927fc417e3eb76aa5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:43Z), 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/ATE902100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dcd155a4eb0e48ecf9a684527bc6fa5fc0a95ca09f0ce362c145a6872082d7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATE902100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3358c5980da979ced78734f4ee9878110908eb5d9dc458ab69ca82b08b257. 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/ATE902100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbceca9c453741304865316dd1f81ef66c8681550bdbd1bd8016a0f77e1e972e. 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/ATE902100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055fa2888e6ad14edf3d48f2402b096b7e945e9ac9a7b897468b781dbd5d146. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ATE901800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ac73b3b9d2e452248bc7b82ee27d6a3bf498b045c908c8f3df0f02a6a9ea5b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATE901800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba10b9e5422b34eac4e6a74245a391a001d87a15855f4bb6c4b11bc3f2e4cdc5. 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/ATE901800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7ac6644939fe66e3f38718c32fc2be6bef7e6c7654580ff9c5ec39635b2c82. 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/ATE901800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa685c14bf4dc295c56e652f4644f20b278838b7bd6875b5b311bdbd4ee25f28b. 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/ATE901800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a1454cd138c4ff250b45742ef7511c51126776ef864a2b2b672cb83c1a061. 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/ATE901800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d703063db3e36fd28591b573d65f0933a7b523984fef449656956a50be0913a. 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/ATE901600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54428894ecccabb49fcb8c3a2166159be7d64be390f901542c47cca52b41e6cf. 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/ATE901600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01150f22aff0dfc7bafde5dc46ac2e2cd34d025961c59d62a2c95e6ee0b88d0. 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/ATE901600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d428d1d8736d81a8eb56f66656effb291f1b8a4ffea5bc4b9411f2300ae501. 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/ATE901600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9687f3aef6d9805e75d6d64dd4fd50f17b5e53148d6f2be954bf150f5a914ef. 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/ATE901600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac466cf369fe3aff604bd8ef8274d40595d33337eb1579f44e9b2f5ea2fc041. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATE901600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e4d908be440d6dabf64b42abf864b3e8f21b2ab78e933bbdef79b7276ae5e4. 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/ATE901600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e57231f2c79f9a00476b62a43be478812a8130cbb5b6d993b7bb0d57358ce1b. 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/ATH301406030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059b0ffe25e5b5baa8027121914f59ee2df0ee659e43f40304b6e02892362674. 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/ATH301406070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41460ded29ce4590c9a47062bcbf4c5071840f731c0907b1001886dc0dc4fbf7. 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/ATH301406080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aeb83830615109114533f94c2044249bdb7b48ee9fb65e2556067610e9901c. 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/ATH301406100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587afec285c44e6b3571aefb031ebd2cc1e42e5f544d97ffe7fe59861549b5e. 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/ATE901210002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15467534c629b1af6ce6978454fec64631710f63e5344d7228283c2a4cfd21f1. 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/ATE901210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d3f0f7836df6f47c87b0ac9e9b0cf0721cfaa167bdb17d38aa8e57db459a2b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATE901210013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825ef98856d47cb300bdf29f35fe350db7a66ecdfafa0f96892727560e0871ad. 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/ATB790800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc53e1012253a420011e5f9db94946b7fcb203993eb65771ee5332c041a41f3. 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/ATB790800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fff72bcd18c626d12b049bff801971fd1626e61dd7b75e5b22b5361a10dddc6. 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/ATB790500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf481e10467b6bcfff53d2a0ffa604e7808acdd63a07b8a779221e529a71600d. 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/ATE902400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84129e874f3f3a6accbb20a0b7c8467c27281acba50b5e9c742354ee2a1ad4cb. 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/ATE902300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f22245f6cdcc0c543b60baf62d81ab9d42b5e103fcc17f456b5492cb426278. 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/ATE902300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dcd155a4eb0e48ecf9a684527bc6fa5fc0a95ca09f0ce362c145a6872082d7. 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/ATE902100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3358c5980da979ced78734f4ee9878110908eb5d9dc458ab69ca82b08b257. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATE902100014.