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 0xb1a449484979412db7caadc82bf4c918f87f4347b2a5e4f4413ec83978a660c3. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f02c71f3-7d10-4bcb-8382-bbb8683c95d0.json and https://artists.proofprofile.net/proofs/artist/f02c71f3-7d10-4bcb-8382-bbb8683c95d0.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 0xc39850bc1ec29bd3b808c6b8a2172420e77b96feb328515c1ff0b1ecc7ce475d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLFP2354774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27417cef99dc5d7f70542c06aa01e5821ef810b02ca8366c6911a7900e5a74. 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/QZNJV2461427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea95c049b243b8ccbd10089ec5d37f6b7eb377297002ed5f09143a4f9a3e14ca. 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/SE6XY2319193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa412141c897aebba5632d7ae64b5cfa4f77437f1239febbd5491ca5db6c6a82b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE6QE2362448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11c21c4a5c00a45d57bdc9ca7a437ca9b4febfaf41fd8c2ba9513e115c4f54e. 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/QM4TW2152576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183aa0b51fd453660af501454d432f2e23dc736faa075b3afe80b10efa800ec. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZW9K2480984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63195fb722081a34a8f5331ae4488ced117b487c5b31aeea775282253e9f7f1. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/GBMA22097064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed673a269e91fdeaaa784e6da87da8e7d0d887a67c1170f38f86306b8b752f7. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBMA22097065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e098f10071542bc83e85c34c2619e8cc36be158cac89f8c3a44260a31cbbe. 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/GBMA22097067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8020326ecaeaf0413efc5d94e94d131baf9d470737a978145ac0ba0dd3893e. 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/GBMA22097068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48ec4f4b1503f323532881e4c1a8d65d1b4ff9487fc5dd18ee7378cebb7a78. 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/GBMA22097069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291bcbc25d7fd201faf0607a637ef521c5091d02191a7f894bfb14964e682d0a. 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/GBMA22097071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad78c9fb772f297675f2e16c0f9fbd135927130fa1fb6ac2c0d0c4c27f79c03. 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/GBMA22097073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb98bd2cbc46242504c0590401cea92f8a52b9fa0559be56ac49cd5ff86d56e0. 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/GBMA22097075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebe5f477aeb29c06be332e2aad28ac5eecaf02724a5c08987c480570cb9ceb. 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/GBMA22097076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd4b9e05f1a616478a1808e91cb9426a1f3c45c0dc00a4b225f6088b8a43f38. 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/QZNJV2597589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d04b14907d8d2cc766c4bfa1f0049812c8b6d724725dac6a23630337a0195f7. 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/US7VG2563945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7189cebb7051d1fba10e070a88187240081bf4e7eac58ffe0cd10ab672ff5285. 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/QM6MZ2415135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e6cdded7bd42ca35908c6cacdf515a7bd2e66c2f2592aba7400360bf9ccc96. 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/QMFMF2341479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bca93a06f38927a25db2afe48e65591214ba1eeacf1aa17defd4bdd86ee12e9. 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/ES75E2305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e1dd11aef70ce63a6f781803c93156462d61bc60a7363109b2ebab75389a96. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES75E2302868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf459029cf6a8a1a9edc76c83a5f9ba4252da33976b72adcaae17fd304976438. 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/ES75E2302056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab4d25c59a147c03528b802617c3eed9f33c0950dba8c352ffc9b0cf5ff84a. 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/ES75E2301698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221ac066dffe09b34e9079d275e6ced203d06a0167e0f2f2a7ec14f8b21e8c0. 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/GBLFP2038692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3149fcf3ca0a8ef941e5cb134ff798aba49155dc24efda8c559fccd6c74671f. 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/QM6MZ1914078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a689b290a5971d2a1651a01d0587ddab5f8b1ad655e8d20fb227e9a88b6d91. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLFP2046554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ca2486764ee0168166cdd632be7e285b71a6d1a4b9b795e5d09d226265d5ab. 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/GBLFP2046553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd9af44211f0311e58ad6228c6ca0ced742d82d29081e588bf9d9e83e13aefe. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBLFP2046552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0adfbf42dcec3d943dbf81e3d8aa7b932d0ed24d7e211b559a6553319e1185d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP2046479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b94cc741a28034a37d7af6c133f2c7f390f3d91619d53de66d9b58658a695df. 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/QM4TW2498638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edd99ca1a64a3c2cc2098e8de5c354d184529eba3ccd3cfe3187e25587005a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM4TW2452148.