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 0xd14ba7eec0dda1d08e0b94b161c8e9177fb26bc3e326eb47134479bdcdb02749. 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/eeee9885-41b7-4ea5-902f-7fa52c17749e.json and https://artists.proofprofile.net/proofs/artist/eeee9885-41b7-4ea5-902f-7fa52c17749e.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 0xbce03aaab18d7eab28bb1aa90b062ccce68594865bbfa38b435969154b583d66. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/SGW502547648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a614e7269b7c15c90e963b41c06312d81290bccb79c4c8fe2dd71429eaf7f9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AEA3A2501506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0465d8cad35bea7a54dd15d25e836ad2d46ae08d22c8dcfba4a5bdac2bd0a46e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AEA3A2553178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b18a20227e3129a4c08217fd1bb5e12fcadc6e41ca733800f65509404d928. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/AEA3A2581606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde7fd4cf7fffa8b91b56e6f86b0c77155b26d9cec1377dd89b2a17318b6472. 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/AEA3A2513156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417813ea89e5c66462026807685cdd042b059174ab86f27f99581812d85e0e56. 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/AEA3A2127331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe49c90fd4e3378550e571fce78f5dd1cdce0d1512e78461cab628b385c525f. 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/AEA3A2155036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6cad4262f1ea00dfe223d39bdbd2b72379b4467e9a02abddc65c44504725d4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/AEA3A2147118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139255c10abdd11072f96a03a2fa3c2514f7254a8657c6866acc467bc113b630. 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/AEA3A2180481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5adf540f07df1b52e708094cf6ff99efb2dba46bb44718e6ce1b643b4ccb9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXBAV2100578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d9a642d4b5e1982f035dadcc163c6851e9caa6fdc66f72cdd5317ddb09d3bd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXBAV2194337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b02810b6eaefc25cf4daed22c7dc424952cdef56e53e8de32778af81f81d714. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXBAV2190262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce711f21b96d9a5b28b4d6917d1150517267e3893652f89a96c257e20d0acf8c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXBAV2130900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c58513acc97046bde2ef8cd488a164c6fbde799c557830236156cde052dd434. 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/GXBAV2153729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ad84965b52293b3a23ddcb650f88e452ccd4dee23628370f5d4f3b74efa441. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GXBAV2025826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96172225d0acd1cd234619288a2fdcd4bc5d1df7b5fe0e9be29ee16597e0978e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXBAV2005249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a67f114a2b84bdfb558e39fe12efd07470686874553d882d0577f4810a9f31. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GXBAV2022224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9463dffd28059479478fc17bd007e6690031807212677e3ef8399f350f17063. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/GXBAV2046850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a9486247138a2d8f7f53f3cf595a506ecd87d6f8a16fa414c9b5a3cdc1b501. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXBAV2044310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0409a7ffe68d9641cbec7979ea7e64224c5c626b27205094f0ce194faeeb86. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT5M32597309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb2958ca15a7e884c3a3ad73e5f3a3848f52c431e862cc13c50e79d823015fe. 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/QT5M32529382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8305e38b0d44473ab1364652e8a40e033d2d4f89276a555651b208c36ca27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT5M42508375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2c2d3695f3ca19a5fe6c13eb1593bee7fb2e10333609944a7223e93e171e44. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT5M52507287.