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 0x2016a6e48bec608ad521a98dfb950afd8a94b48dd972b81f482e1564f6aef9e5. 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/1840a896-5396-47ab-88fa-72a43ab2d1e8.json and https://artists.proofprofile.net/proofs/artist/1840a896-5396-47ab-88fa-72a43ab2d1e8.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 0xfc05c2506f1a52f583dd329abd019b9b575357b915d0b859324760845cf81412. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE37O1300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174aeade570431c2834ff324f560ddc1b2ecf65275c434c99b7295f008bae85a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DETB31509031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b1a1208d26de1e5c676333c39356b3bcee3d47aff3ef96b1e5d1aba63e8ce. 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/ES70G1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e62330eb67941bd1b3ab2f0871a2d40836553c273a10b14e099eb36118932. 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/ES70G1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bfebbcf29cf86dc30f5f05e8ea010f2dfc8f6dc5ef39e69e1b46c62938f514. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLCK41037513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb5dbd23d2ad1b55ca4f2462527b07cb7523cd60a210017812a09b7de482cfa. 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/NLCK41037514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95b1e8b478d7d088f0b08d202150c663c7f6ec50973fa65d344a0255ffcc39e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLCK41037516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433d5a934e39e114de03ee346703d65c26217e331da024cd11e8b84cbf8b01fb. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/NLM792310006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856b672697cf849874dfc0736b237843e1adeb5343fa12c094d4d7c4b59dee2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NLM792310007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665fecd010a5e660167d5f191b81283e29f06d2584f1a7b452001c557d6eb509. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NLM792310011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60b55d8d45fdcf1368a6f3401942eee4a4cdc736863cb2993d9396ad4b301b5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE37O2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ea42026b5093b89454b65e9b5ba183332dcc05c91929bbc08e6c5d0c39e01c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/SE37O2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290abb6b1e0b95ad1f31fb2ab0d20f2f9f579d4f3bd2a409bb5615d1aabfcc18. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE37O2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326afa26311742fa53c3b208dea601c9f5d4ffa66d17d01fc17495b1b5bead74. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE37O2500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f2e3aad2726a40eeba9970f68b4c9478de475c8b4fcea0b58af33ac474bc00. 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/DEG931992254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f03662e98074bb42385298053a0e89b20cef11c906299a2621a45f3c8f1a0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBJX33416013.
Sven Väth - The Sound of the 20th Season (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b673247b11ccd80de0255de6af9f27deb35923f6de864caf2a4e8edbf9abb. 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/DEQ201901946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2067cdbc97270e91cfe1904d1ca62dafecb113bfa9dad0e5403d6ca012bfb880. 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/SE37O2202101.