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 0xf43aa783a36f775a56119ce21a11713745d2a95e0881d3a47b126e5e2f2287b4. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ae1bda0-a92b-4685-9c5d-1b26d1aa7b68.json and https://artists.proofprofile.net/proofs/artist/0ae1bda0-a92b-4685-9c5d-1b26d1aa7b68.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 0x7caea2555628df6ccc5b8ff3b4a01a63768900d6edf6b50903b39a8cc76aee09. 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/GX8KD2345733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9021097022693e4e6b02cd3ae471f241ac08f56b837e6b1628147fea26870436. 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/GX8KD2331486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96076f72ae18c6dbeb0c7d1ad021978cacf792d872185743eec3000f9b2111ad. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GX8KD2371151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45059a866166b2babc2a5cf500d392bb06f3245e2b362e42fb509077dcf0fade. 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/GX8KD2321450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10693ce40ac168e477ca3ad31b66722d896a910dd6051e15fa830c4190439f12. 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/GX8KD2308247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4d7e0a4d1e72394054989859d294d9893bb179c2857500268768d9bb1266fc. 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/GX8KD2392669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7dfd73f5c789c937e65925db6f8146c07d98c37b59bfd56acb05fa385e50fc. 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/GX8KD2382103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914c4f61af38c7bf5180b26d0778e9849103339dcbcbbc71283c778f0b0811c9. 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/GX8KD2346691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53723c67451158f900a5d190daaced13619ce3e87f3c41c9274555aac01b6342. 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/GX8KD2373060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e19d3b42e3864f73df0dbefc31ae28278a047d9d9e431e63caf5d7c9ab562c3. 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/GX8KD2353751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a51acff021ee50412b52c6946ca920a1c170d81d69888785f48e25067cb6af. 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/GX4R52470350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de51a8dd9f72c5f77e3b054d3129f2ea0f4822a08a9233ef3e6ef48e4c76f18. 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/GX4R52410233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f20ed626c2759751bf88580b5486b55f852dff152a3df02e054c1e2314cf29. 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/GX4R52413291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bca32471cbb944e42f8dae9fe5712da349c8ac09c7abdf300c78c33a4778a6. 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/GX4R52424124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaf68a47df075cbde537ab17df4efb226d2090c08bdb48a37a97bc9def30ad2. 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/GX4R52402552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff99711d962029edea6407dd8afb10924229338a8712e159a55d5915080e7346. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX89G2258166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94505f1a18b58aedbb89b899a781b19aed2ffc10dcbb8de9d4663f4427044733. 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/GX89G2258168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb2971524f49249881b13622938bbf66286d2ff95eadb95f66d08f638c6441b. 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/GX89G2258170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a427cfc2b17ab39c22ebf1f4c615b19d5c62da9a3071937e4463c14c4fdcaa. 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/GX89G2258172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24a7c59649c70ca33b0d7998c66ca9f5c3d21da9fcedc8746fdb3ec09be1819. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GX89G2258174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef14591bef1145cc3e20aa6bb8d2e5ac3435e59ad02a8a9c77e172be50f3288. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX89G2258181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb67356200e695081922c3707c031d387121d64200d0129e1409d4b0d9aff07. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GX5MX2174996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4aeef88923b5031d5313606f6cfcce149e28b0c8845e1785151b0c24be5514. 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/GX5MX2175005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab596a56ec1f0cfd4e0fb4abd54eaf96663c084666973c6d8ba69a9ed19a348. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX5MX2175006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e9e8d5657a57d5c9c72e747468fb09027d38995524591bdbf9b75a3002d882. 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/GX5MX2175007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947da16e56e004a6b8636583aa9e110465908c7a82ac0f30eb38eba47be9e09. 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/GBSMU8472326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6489af00c02b4cc9f6148cc7a664671e7987a5abb6efbe75890af31783900bac. 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/GBSMU7878750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702dee001dc35953883292a7d1b85573cc5a1e3d1d12f01ce2d6679401c28c65. 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/GBSMU7878751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda2d3b22f016efac9bc426e7ac33a3a07f6760632351d8e8abb4b93bb1d158. 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/GBSMU7878752.