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 0x4d191ce2d81463751db5a47ab50733b70d16610c432a02e11a96c5572c98de93. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a698ddda-26f4-4682-8763-d11d151c9689.json and https://artists.proofprofile.net/proofs/artist/a698ddda-26f4-4682-8763-d11d151c9689.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 0xe8c49da5bc8f8b2fac4e6290f190a7f0347e51491ff2d2b8923fbe09b3c2a1f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR0331007491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe703f216cd259093f5ecf2669bba08359e3a7408a88fb416c006a8c2a2f39776. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TR0331007493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed15742b7ec355613f2dc5e0c1630fe05b0515e6346ea3c7dde72bcdf9e7083f. 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/TR0331510134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac80030ab2f4819c4d82f9b484251fbfa1e45882dc755e8d7e08357ddb4deaed. 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/TR0331510135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9470f7666bd19cf0289300c158030d171d66751af297808549ce2063c1c54b77. 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/TR0331510138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab461c2115d46c0fad16436d919145d5ee2222547a75d9aa6d1553c0ef776cd. 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/TR0331510139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fe6ae9e6edb20164061e0452a013551aeff49cf4e81772d62699570b07ac56. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:57:15Z), 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/TR0331510140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5caf057f361c1e164b6a4461187517210600e6b32cee3c4cda095781244ef21. 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/TR0331510141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cba7b8138b64185e3cf15727281e9649f2a33441544c06819e364299752402e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TR0331510142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105e7b46e840c9ffbfbc76d63fedd4e2167ca3a93b092379e795cb568ca31c53. 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/TR0331510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a81bdeccfbd88a85e4b184c71995f10a020bbd7fb59c59133e96d092f1abac. 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/TR0331510151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44895a274b32bd72a3d2bdddceb589ff6a3abf6af135b504097aa3c9b9e02b71. 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/TR0331510152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa715280959c3c05e25f8c8a00cc58afab095626538ae70793d523ee21a460728. 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/TR0331510153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee430d5b937851d3376bc6814ce14a13a59394ebedb1fcc43a381d5f32d344d. 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/TR0331510155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd77302769778a53e51265dea1bec8df9d631157de45d4692c5e48fe0967cb. 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/TR0331510158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b0c8d559454878eec12ab9ea253415d80a2973aa63aa12bc15af126da8d21d. 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/TR0331510159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9829a711150bd5674be1d6d145736847547f9b3b616cb3e3cfa938cd51a162d0. 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/TR0331510160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a51406755b90b648f9c225dff708c83325b93814b9ddf6821b55418c33f548. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:52:56Z), 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/TR0331510162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0761cb3e5e00b0c0bf7f2a47ca2faa123fa11b1930eb33ef770b5c6aecfc0b. 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/TR0331510163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dfa4105121e00e8f21eb98460376745bf11c7b931947f05200786a1ea2cfbb. 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/TR0331510164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1973d27eb27fa460fc06ddaa3dd12aac38db71230273123bf57c7d9e1978c8b. 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/TR0331510165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd373169273a365296220bc8f6ea537f483f10e22d148a9efe12e48743512fc91. 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/TR0331510166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c3927d9f013c0495d05936900bb8c883629b19b5d58796e33cb56b432de011. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TR0331510136.
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 0x3747098a6200ba047c0106a495e9dfb83be5318a1f6689649b2452bcf9085b81. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TR0331510137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0138d5265917287deaa1edd3b6dbc6b5ba8cf9636602304908e473b3003c69. 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/TR0331510144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6b4deca1da8383afa5c2705cf22962e50345bab386f44378503c0f3382cf33. 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/TR0331510145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ebdd9cf4cba18fbc900a559837bc73e1f4c79f96439b8266f974f6277a5ba. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR0331510146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9c326e8ead05b950cca2708845754cd085fdf497442351681e094fff444ee5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR0331510147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e08fa42b764ecbd49c4f68778c9adc0e02dc3f1dd33addca02c12fd3fc10ef1. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TR0331510148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7319881f140b687d3cf1115db4b21a78b833b1f82e8d25f01e651474e2c2e670. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TR0331510149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78757529c4fd2e1987454c190ad303f0ecd047f3b1401cf10ac00aeccb9310a0. 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/TR0331510150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb163f2329ad29b242151e3164ac18041544cd8ff4f1d4a578a52f3ca43734cbd. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TR0331510154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c300fc3ce053f528953b4a153772611694b213e149e4386e098513fe35c577. 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/TR0331510156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d18fbc35fe76c679e3603b4ab3d9e74c8b23185fdf84b6dcfa3f89ea6d0ddf0. 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/TR0331510161.
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