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 0x01f0a456cff97ec631192afa60633ef6a054599e25e0b02737235f9e0eecfa59. 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/691f412c-acf2-4766-92ec-618ea9d4192c.json and https://artists.proofprofile.net/proofs/artist/691f412c-acf2-4766-92ec-618ea9d4192c.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 0x55688b9ffc2fe1d98d05c72140c5d90b04d35c82c98cd6cdd7629569a4a10f5a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:22Z), 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/NLCK41065935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eab6d2703d5a287f3ab2fdddba8642609fe5b3c1e4be446d4037e5f9645874. 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/DEAR42178668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0269b1dff8afd02f597e508f9ceed59da0e4854a9ad54a1416992b8c283a6b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLCK42212067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b898994edc17c8eff5d86a0157edbcfbf8a74a491412d0c68cfdd616b8581. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCK42212066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93be380aa09574bc0e13f7b0f64bfa11f246cff07b39c253610d94af023ea918. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCK42212069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6ce737acb947881dbf259e4072967824b53248bd877cf41dec47d72df04fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCK42212393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d7ecbd48dc14dd7b5873025d593efa23d8038731e2198c18965f176ac40e0. 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/NLCK42235669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161847f51af731eb14ffd893248a680358ab86b922b5261471e4e45e72acbe5. 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/NLRD52355061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83506e865503a98b6903947b93a410874ed8a962d4f5137afda9fc2e32e234. 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/NLRD52355092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bc4a3c72d01b2eceb06db753d3997b422d2a7324b8bd40104bf7b1343b5030. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:13Z), 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/NLRD52355119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83506e865503a98b6903947b93a410874ed8a962d4f5137afda9fc2e32e234. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLRD52355092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161847f51af731eb14ffd893248a680358ab86b922b5261471e4e45e72acbe5. 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/NLRD52355061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6a8bdf7852acdf90a07586132eb32008029937af734af2a36a3cb40f5bd7cd. 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/NLRD52355127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa882b8b8756988d380651cf68f88568adf890f9eef6e06bdd2a45eec868cf755. 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/NLRD52355128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80bf9245f6b439100c1eeb521d166978ce121e6e9954fc50891709d47d257c7. 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/NLRD52355129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7deec84f69a3a89b3eb391ba2c849e377b6021b3cf8c3bd5bf070dda3735a2. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:07:24Z), 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/NL3M12412447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576963880253bc3cf473bed32faca7d18442c8db129307559ad26e1af9b170ca. 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/NLRD52413809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d7ecbd48dc14dd7b5873025d593efa23d8038731e2198c18965f176ac40e0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLCK42235669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b898994edc17c8eff5d86a0157edbcfbf8a74a491412d0c68cfdd616b8581. 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/NLCK42212066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c1756b4926e3cf22657cc18df6a887f75a8302edf6f81c0c10dd721291ad1c. 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/NLCK42237236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a99840c9ed06d3ddff459271003f87ac18dd150765ac6d31215a13d930ea59f. 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/GB8KE2055367.