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 0x5ff6c571492a6f83388b356843e2a1d82bd42b8638a0e54d6bc6c3d232519cba. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c40320c3-e56b-43f6-8e41-cc0ebea29d6c.json and https://artists.proofprofile.net/proofs/artist/c40320c3-e56b-43f6-8e41-cc0ebea29d6c.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 0xaa649163b3aa37ac4e8033ec576f645db3bd73663b1410f563c9134b529aaa5c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM20956070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b28089d867d6c4f5d120e6927adbe6938b83e8df91d80a56e77020fcb2bbef. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM20956071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676b0c2b241c538d4f1be1bab90f5928f13f0b8f7e970ab71734e5f12ab1fbea. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM20956072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710995ea99b48bb9d2e057c6c9b6c202c66c95b78135aebabd3aa1dd076fc7f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM20956073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e4d9340db895cbcdac334890981042fb71008750ed03b424182653e95542bf. 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/USHM20956074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b95db3a859c7666d8e2629851d4ca49bb91c4e583ecc09a6c1dce36ceed9db. 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/USHM20956075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0240322d9c0e8788944ad304dea26a138248dc16e586f0725730885dd9f219bc. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USHM20956076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2388e9052864bb96abb87c602e9397fd4370193998da433d822f2f4723243f7b. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USHM20956077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b6fad3decd647aeda3aadee91b61ccda1fe06f4f2f8f90568fe622a3d0aa3f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM20956078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd083d4bc2fc1116c38eb8b2f3e586cb63d0bd6c073194e768d87b34983d3a53. 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/GBKQU1312195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7199a953be7c9554b51a1f550b5ccd8e08adc511cde880fc143836f636b8976d. 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/GBKQU1312196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37286a0f11dcb8c48f797ce87b90f24d25144f35f10e610e29018f060a8b78c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA3P0400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1980faa3ae66a5cad3b843bf09b23b223ccd568a5db8447b0ba38d98a3f6e454. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USA3P0700094.
Tizzy Tixbown Riddim - Modeselektor Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd235880b8ae0dbc56d6b35e29c88f1102e4559115ae92d54711f63aad63ce8. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USA3P0700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad9ba0a4fadb0c303519e33e8b9456d0f4368e0029c6c6c95bff13ed29e0cc. 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/GBKQU1312366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd79c25b34d9754c53cdf14f7dd4c1ba75dc9a78a161c8c38762876024b417a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USZUT0200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b34727aaba398c659ad9eb0a1b2b244a48e2c3666c5005f9906795e8170d5. 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/ATR981124182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a32747ec861c8a894ea782f69113fe253f4f0cd70a0c9c426fb78b6c068157. 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/ATR981124186.