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 0xcfe9d1c2b62d1a7e248347e2d8521f2f9fe02e411ba2483189182ba42d0b0992. 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/a7e95737-2d46-4ec1-b8fb-2d495b627e6f.json and https://artists.proofprofile.net/proofs/artist/a7e95737-2d46-4ec1-b8fb-2d495b627e6f.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 0x7a3f9442e075834bfe51eb5cfb6a39ca6b6d2ad3fa174d7ee60dee8a69640a84. 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/CH2011719149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4498d988ebbd988b6b1ab26cafd8b623b50660d90f430e0c7fd5b5860fb3b47. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CH2011719156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307df862ba6af10a6d071ddef44d2be4365add4996b8b9869837ac9d82e77356. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH2011719159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed7bbb5fce64d708bc6fdeb7a5a7648464c3af0f19804b67d20e85d6ab8fdc. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CH2011719162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042dfce1690126e60c734be3b82637703bf4949ac53db47d032a13eee2da9d19. 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/CH2011920067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edfacd2168cecc3311efa5bc081474c3815a0a0ec10eb4ee4587c16d9cefe6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/CH2011920071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422a12c8f8df53af00f71d7b263245b1a3e820ebd7ae6cdc214b5bd5cbdc2b6. 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/CH2011920074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e0213708932a3a3b05c2252c2d2fd3f4f91d9848f7a22a8f02bebb7769410. 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/CH2011920075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7ec97041e51417744d1eb52b69fd936d7dbd2995f760643cbba2b75498b9eb. 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/CH2011920076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddb92d0df57f619a934a65545aab8ee525a6bc25aa2a490bf6fa99199a90d8a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CH2011920065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e384140b72edd16b3e97078875ab528b4f34fce690508a82a93d96a9809648. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CHF502100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67852f9c1f34fa88dae3f6c9e83f0a8a3fbfe0041a845a031f2ce5116eef4428. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CHF502100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5341f272eb188721b5f441e2a0b3fd75dbcba25be92fc1036440ae29233617c7. 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/CHF502100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a469e6e1f5e646812c861d0c22326785b102aa9c24be69e62669d92f5f2f635. 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/CHF502100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfdf6361f132c833101908e504cf102700dc586e37252f76bee8ee7434ad77d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CHF502100017.
Was d Zuekunft bringt (What The Future Holds)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44179fbd2e7dc1bb4768da06cc08aa43b275d29b84eda4bf81775eda235018c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CHF502200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea798d7aae591ced4e1231b1efb7bada99f7d8f9654b79d11c8b2bad1d9a0bb8. 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/CHF502200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa627f3a50d55f39d60ea6a891b6589c88ddead0d11c4195cbdf35307f0bda2a7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CHF502300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b8d8b046c38f055bb1ca889f6dcb597540330d2edeef2c23a8dddaae2c34ca. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CHF502500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968150d0d5010ef0f0c03affc76f22a388a5855b14f5ddbe28c6ca0fcb9cfe0. 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/CHF502500044.