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 0x6ade17a30ea4e147638204f29df0b06b69e0403d1a17ae53ccd570f0a2f571e5. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b2a6549-462b-4680-8f63-3fe1cda75e7f.json and https://artists.proofprofile.net/proofs/artist/9b2a6549-462b-4680-8f63-3fe1cda75e7f.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 0xdf8a0b9b70fd1a8639addb48db3931e87fc874bf524b618d712accb2ec9f5bd5. 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/ATN261505201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1364870aaaef748506b75f7d34f165a25ca6ae8c8788a76d4cab99c61ff920. 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/ATN261505203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6d2f99ac4ef6a50ad819ce89cd8e29b4c69ce4b95c86745247c3db666b0ca. 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/ATN261505207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f832db4f3eb31118f7ded4c5dabb9e0c56d73ae39843661b0f817c5bdbcafe. 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/ATN261505208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8219691a8748255328e9abf256b48dcb31bc38a8213d39a89b79725e09a2d1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ATN261505202.
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 0xc2729c01db0e17cc8f57ce1596d7eb8c51d1a5fa8524f5fbeded27c05f2d4cfb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ATN261505204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb55582722afe52eef20844b5f3bfba3cc3176264cd5d733dcbe4e7da6f4741. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ATN261505205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fb15e86d6f8092327d06054fdb0003a70df6682f93836d63fe3640385c0b9d. 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/ATN261505209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd5fea03cbdb605f6f503e75fe8ed0670a29c0b89808256787855c039337730. 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/ATN261201601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6972791efe5cc96fc3d7f770d169e6e42959f11d868b74f9db405640fcaea37. 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/ATN261201602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cad046ebd030f1dcf60ae6fbe5e0a59fa45e95328a615eebae684ef51dd00a. 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/ATN261201603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aed0d301e0f728cca42ee9a6a6aaffc1af6fc06b8a2c8cb4322a138de125d78. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ATN261201604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b36f4a8f0294dfd8950804866b456745c278f087f5c3e7d097694f81b2142a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ATN261201606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9154a63272d0d9102a58319c3223e9e8fee908486fff0e8922a1487ebb933151. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATN261201610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60a84073e4bdf347c37c7642e8148c2e58e4142e523c2a2c7eb4b36c73e4e0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ATN261201607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f801d7d2aa5bd07ad2439f760850a94473e8896f97a4ed4923857e4097242. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATN261201605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038019edbf2e6d16ebc1da0a6c3848a994415655515482c043a9a077286b4b48. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ATN261201608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0b2133379fe364abc616a99375b60b42d64eb5d87d788b8a95a67b9d5b06c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ATN261201609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b0c05914d0b1cb9d2e1347f1d0ea66ef9de91dbd902c4471460f43a7ac261f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ATN261201611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b34367980c6fbe032d18d3823edd3edcd2e03fc4a9afe045518801428613c3. 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/ATN261000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf39a7953b87e7780cf0d0304b1d1983e8f4639ddee5c93387e798ea3414de60. 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/ATN261000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e2c155c3fb7819418a368eec72221b8f4eeadb3318796b603e44687e19c836. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ATN261000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b23bce1b67815fe1190b1f04aaaa136825e1ce4b784c16445594af2e1e4c6e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ATN261000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1352830feb48401837b1d870459a20247d3e9c6a1a6e1b71143a2307595cd7df. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ATN261000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04ce13dd50197258abf8d9b55d1bea50e5a7e152f4957ab11d6718298324f78. 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/ATN261000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9216d599b336bd9bce34a765b6e750c051542e07ec0d40bcf75a1887e9e762. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ATN261000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22f8b3df2bfb44ce526e5df92eaa00dcb90a1ffadb7000c8f47a1799979600. 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/ATN261000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac977946b69e66099cb1caf4158cac7b30f1c2f9299a30eb96b81ce9fa86acf. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ATN261000209.