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 0x3c85d54752d24b52c10ba9cf53697a170ae5602d83047a50445dbb16eb7a13ce. 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/a4e5859d-03fa-43e4-aaa9-8d06d50ab802.json and https://artists.proofprofile.net/proofs/artist/a4e5859d-03fa-43e4-aaa9-8d06d50ab802.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 0xc226dde7a145927e11ed126288258cca9db9781bfc8aa34c70e1891104b5d51f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBSMU6642719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd07df2a201cbca0f9a00d245d48e09e2931fa43debbbbda6ea762970eac7c1. 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/QZGWX2190685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55963d00c6c8b469f4ef71679c9ed33577f001f7ccbda9a79cf5962afbcbf85. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZGWX2189503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0c6809a063ebd81fee9ee01e41665524dd961d6d9052dd5e83d99ecd84f21. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZGWX2240216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0983b09527dbe70a133c31c4f4c3de5b07d826b7ac736761b38d7eb6c7759. 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/QZN882153057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f24ac733b0a534053ad2b22384c1d46280a0cebd81e0c7474905749f90b0fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882153059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b4f06ca69108e48df859c776ad8a5fce7ee1be280c40bad8941f3e6be58cf. 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/QZN882186657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2239b2a9422e15d12b4b92d0219a769d41880d5e676d725e5b92ed083f9888f6. 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/QZN882234175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43efefa07d895ad16a98cd92f50b848fbf5f520bf755ddd54e7582f3dcac7c08. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZN882247669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224334cf44d528f2ddebd57a5f1f9d029d0aa195c5fb9e1ae9f09d2a2ff3ad4d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZN882258076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbdbb05bea884e936ba6abfb1d076ab5199cc925500e632c0e78120266d5ef7. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZWDW2204185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40005834d421ff420017b80427995d9538338e6e8f7880cfd409666b704693cc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZN882358441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01eb366f910e81a3192759c9b46b1aee6b3035a1cb9b76780d1ec8c3a72c907. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZN882395263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa1fc7a1c41630d401132b36aab0b5cdb8af35d90a4eba89a41564237bc76ec. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/QZWDW2309013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc15e3e2bb1ddaf4628cde3f0fe1ae4643e3a2b55012a2009361020f1f7b218. 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/CA5KR2349807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeac7bf57a097df7bfae73987801463cf300a050c34dc602e7001d07969943e. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZWDW2365760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c990ed1be7a40a3768b7493a1b73a8829b54cf698a0853c0ea4493cd89de95. 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/QZYFZ2344425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6114d27d83afbba3030b9d4278fc08b17817945fab946fea5e873a01eab8ebc4. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZYFZ2344426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3882d67e86b1b1ad6e544a08182d935ab734fc9c24f2c8f17ff7dac656ddfda. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZYFZ2344428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe663095ce7cd7655c879b36563ab0def1665b53dd88e792cba87c8592b3868ea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ662317173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958cf2e746c73b7bcd100467f7cc9770c0925ac126fcebead3057ad7bf63290. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ662434691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd912ccf42ee2dea8b81bbd824d2e9d3696bc5f75a8b9644df4124b0c32d0ee4e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZZ662434693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81956591edc6dcf1ca10d1fd7b0cfc23612f43351a805245820314acaed21425. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZZ662443481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8bead46a54ae34cd509f6b21104a4d04e19f87954b249e0ac267a3fada7b7e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ662476834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3ea601a7649e2691c1baf3f4c4df734797647fadd0167ca7ad95222be9cb68. 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/QZYFZ2428849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302014e4bd334f58c188d159f4807c8aac9328d8b655adc24be1f4b0fc25547. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZYFZ2446565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739849985a0b5c3a4bc1df5b1a5cf0e2dfefc01a0ff9e37b2a0a5069a69bed4d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZYFZ2464853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d00b66652c808d89ca35f6b60c77c456b30dbe6b25d8064cc8c832349dcd4e. 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/QZN882422767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81956591edc6dcf1ca10d1fd7b0cfc23612f43351a805245820314acaed21425. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZZ662443481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3ea601a7649e2691c1baf3f4c4df734797647fadd0167ca7ad95222be9cb68. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZYFZ2428849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302014e4bd334f58c188d159f4807c8aac9328d8b655adc24be1f4b0fc25547. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZYFZ2446565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b60b527effbff55c16e5f0678b98716c8f6b2850a18f95f733033b030e51ae. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZYFZ2446547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958cf2e746c73b7bcd100467f7cc9770c0925ac126fcebead3057ad7bf63290. 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/QZZ662434691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff58f26fd4b2bf340da39834327e3496eeddbf8f9277380d94e354e2de751db. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZN882536788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0624f0cc7f509644cdb8991aa188f4595bd64fe23ca576e088619ca686eaa. 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/QZN882536789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf671999b13dfe19b0881c72c2a29bae109b1a60369c90c2b9a1b194c969945. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZN882597978.