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 0x5ee87cbcbb14497929aaf48399792c01e8a95adbca277eb1914628a6c28e98ce. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39e812c5-d725-4a06-a0ed-5bca20f23e93.json and https://artists.proofprofile.net/proofs/artist/39e812c5-d725-4a06-a0ed-5bca20f23e93.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 0x1b95fadf96707892141321878ffe811392cd84986d262b4dd7f4f7e8d6516081. 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/UYM121701126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134040aadc21cbdee3d9d5d60c8913eaf14afdfc766d9b51cc0ace27ab9f3c8b. 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/QMBZ91336128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42933e31005c7f9a08d3569ff1974ab9d8c4ff30b368a588131a063ffdae2ab3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMBZ91336130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f8b2ce1eaaefa1b486711ce41c16269c707ab1437a1118004a8230a92a8362. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMBZ91336135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2ed7dd668eac00e8547dd545103c6bbf83b44cbae87c69dd4250678ffeee0. 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/QMBZ91336136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc21cc5ffa8f7a2d0c3b57ba712af72deab985462ac8224f209c154cf258af80. 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/QMBZ91336137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9bfb63d4dd2e4108490be32cc0c3a1b4cd3dffaa6ddffa572edaed48ec79ef. 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/QMBZ91336114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf865a3234e0486e6efcfe44177795d8e1be2907ebdb0bcd6f706bf4d28538d82. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMBZ91336115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9b492b4b9d78875a7ad696ab148c14366b1a60a8fb88db19743ace18837bde. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMBZ91336116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c591d07f01d21a22a4ec328c86a8c37e1f5d0139cb78180fd6b758b1e309f8a. 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/QMBZ91336117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536a38773ffb05c8c32d6cbc4b17de0370bf607fada06b6d6b7eefab4f9fda22. 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/QMBZ91336118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8bb34cd9d18bd240cd536285949b555895620ff1ebb5a5af64db371e713d2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ91336119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b4e379fd6ab593be21bbfabc725d3f9dc522d6e49e960823d4540dbd479eb1. 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/QMBZ91336120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ad31b723a8e83d072ec7d8a18ea902616cc7df4c7f3b3a629b50a957fa3a3. 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/QMBZ91336121.
Maza Lew Fattoruso Nolé - Vivo en Boris 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a147727279f189c669461e03c0ae3c4212110c067c3f00f2798654ac923437. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM4TW2286428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6012745eea3d3b6c77bbddde35f183156bf41eb587847809446d9b7fc30fe0. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM4TW2286524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e27cb4ad3c1a5bf8bb1d9f7762d8108f8eecca0a2806b480c4c3b0a7e3e61d. 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/QM4TX2239463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570971a46a4a0cb9035ed21c13c8c8bef985fb962aa63f778ce712be7f74e1d1. 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/QM4TX2239465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2951e15e94df414d735a73c09659d015c2d0366e5a839bf5dee7fadbbcc48. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM4TX2239467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee1aaf8b63f49c07c97c2d9981efb7bb1e305f53ca94c5b6791a06d76bb27f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TX2239468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b8fc91c4b42a7a9ddb4c924eeaed9991d3f41530b93284271457d79f3efd61. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM4TX2239475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37daa4f996b9e629b9fe2e0c0fdb4b9a1ad66a621d6074578ba7ba796377e58. 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/QM4TX2239476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ee34b535f7ea49a93c7e616dc76d34ee79fecb26aa705b5a752f81898aaad9. 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/UYB262400175.