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 0xbb9f1abd6527f2e00ef9adca2e2b3287a0ad8a79e50e20cf0a855b73a6d48e1e. 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/1c41b889-7c8b-4ee4-9078-b3da2f566f4f.json and https://artists.proofprofile.net/proofs/artist/1c41b889-7c8b-4ee4-9078-b3da2f566f4f.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 0x88be56232162324e2d04ee2aca902f1cbca543f69a01de09aa1d068a209d460b. 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/QZGLS2086154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9d0bd179d080de5cbf7c230ba2cba933366d0d23862aebdfe8bc87817af0d4. 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/QZMZ92055350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aefa79467c5d24c10d49461f242665f9a7ebf258f946c22e6c75bf0b3ce5f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCTQS2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b9cd8d08147fd5f4bc251737e476e1c12ff84c65411af95664710431c30087. 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/BCTQS2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5d1d4c0909f6d34a62ba473f0903ba60df5e783f3a1b9516263f3396b44668. 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/BCTQS2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaee1e6b55532a92d8818f871763de238fa0beb30a20fb7c404d9da0d58696a7. 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/BXZYA2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb0ddc75fa26a589eb397d5a2be480af2f664e5693d4d09cd2d19bceb67eda6. 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/BCTQS2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14fa3819bc801cc2f66cddb0ad6694456c090840e42b70bb0a232f60d01f1fb. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BCTQS2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0793ae8aee7b54784313520b1ece23352fea1a7d48f59238d505e84b00b6cd82. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BCTQS2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345404cde92ff60cd1caf3db65ff716d4fb742909b69d1bb1c55f6f2be023380. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:08Z), 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/BCTQS2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36c987bf76c979d5a0e5cfbdea3d011322187e7e36ade5a2d25194738a50847. 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/BCTQS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c524879aa410ee3569f6ac0dae03d7dfcc35fe6798bea0acb0ae76c351ed3a1. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNJZ2359838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3ea60d46ad247ced6c9062fe1bfcf8c2b511af8e2ce4bb4ca01fed4a4fbe78. 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/BCTQS2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5479ae8e0cb8f8782f644898350018538c57525c04c56ebe0d09be096763ab04. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/BCTQS2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddce9aaa1716e7ba6c1ee9344a51aab42ce47a098951d85be1b0c13bc8e1fd4. 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/BCTQS2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9071ea6b0e8e7697024e86b1212d28e7ae90a5534312b1613eb306d5e3d3a8b1. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BCTQS2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305421b594406c9b62041793ca9e0528c8b9e8148c7395d288e4cdd74725cba2. 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/BCTQS2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b820c4122d084ff22546d9ccaa704a41995ca1a763139c7745f57b2a918370. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BCTQS2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2219b31957a781f696de3d3fb7af8d04f65d70370372f03a06d1bb449d8e1a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BCTQS2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076838e0270162b9d1cd3a5581b21eda73fd23a02c83aed787627ec72290e0fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BCTQS2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a345eab5badbe11f201eea2e65f71ae78d3851f9f7fd8681ecc8522547c523. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BCTQS2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ef690d9714280c4c38547ae5f44422ec142c93a7653ce0e05831c087e426ca. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/BCTQS2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530af006ea8b3e1a1cad1ac2092bc211e7d99a53816b0998af0ef0d43e20ad9e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BCTQS2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838667a88bb6edb120bf4981693820710c76b28a4e97ea6edd5c80ed91c2ccf7. 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/BCTQS2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6db6c38ae8cf65ae104109f3892b6e643d47ad12d69eb9918a9e7d13c47fc. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BCTQS2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c52627b32e16a93de312816f88deab45c3bf041bfd0a976278bd9010bb11b8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BCTQS2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27a3063787d85032e240c84514afb81f5d02d952f85748476d038f69444eb41. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC32K2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b57da01d0c27b61391631b5bc5ebceab5591b95db7b308d1f65763f55fb09d. 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/BXIV82093364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d326f18346a7d392a3cc7ef7bfd428b7a14b9f10e02ff4e895051b0257948db. 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/BXIV82319115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf31c4a41497ba3df2a8f2f93764bed3bb0c9ec4904cb314e1f5d77378a0b273. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCIGI2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e873c69b6b07139187d8e7ba7dddb5a1a16e59153aba547c2e7bd163b1432a3. 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/BCMNK2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25376ab16c073f16d847196e161982f7f5f4ecaa687f577f50ca7e8ea4d5aab1. 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/BXPOB2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41baeb1a75758215d12b177e9012668bf042fcf429ce60eea5500dd8e9dfa533. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC6P42400007.