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 0x2d24f6700de98c8aefc1c285e1493a786fb05e79323749e9881e992aff2bfd4f. 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/9e59c2e4-05cf-49c5-91d6-6a51dfbf9ef1.json and https://artists.proofprofile.net/proofs/artist/9e59c2e4-05cf-49c5-91d6-6a51dfbf9ef1.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 0x1494d1a7e086c5254ff8940043a81ab381f20b5b361f71b378e2562aaf6278b1. 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/QMN3N1200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a165f91b3a2682493669a286ada288f1313508b791b6b567e6ccd77366ff74. 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/QMN3N1200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea758098dfe6d709f91af9d7fb04039bb57177ee0b4b711e0d0eb8cb99870e6. 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/QMN3N1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e42a30611b2c120e1e079c042cb8b88a078625c6646bda3b2e07011c5bcfb3. 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/QMN3N1200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd7437c5c12ab76b4170100aca175123d115583bbf22d61df766c01f7ef1752. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMN3N1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb704e5186d5f2c9feaf423bf447d7d9a62ce8c5cd268a180684bcf5847cc567. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QMN3N1200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df74eb44a76b940e47e4df7eb3a51c0d04800fb759f0fc887ffa6a7eba3625. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAUN91500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60abfe944a19ea69b8f2d14d731977de77603cce91aeeb9ae41ce14c46393cc. 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/CAUN91500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3ddbcf1643b9207467b76185c91af169b25ca75736e72b46a606b5549232bc. 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/CAUN91500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90de1335f21dfbd7a04c0a206682ed80a38b8c0cac237576f0f109f7108aeb0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CAUN91500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b815b79a6495fdf0ae47f343fdfc075c11d37e188466123a4f06d2a65db2699. 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/CAUN91500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad195791ddaf6a089023d6df8cefb8c24128c03d0d5fc91f83a8a0ee3a6da708. 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/CAHL41706002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf6f08481f7efe91ddf49137a7f5920922b9c8a1a2f073d2798be49e180a0f. 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/CAHL41706007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487870066e85ca064c0b2aa1f9761ab476a8e20c60a3ac0708b24ca523f26d1. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/CAHL41706008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6edf806d15275838eca9d9576c12fb8d7cacc5feda982a7cd0d9e92df36edd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CANVU2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a22526a78b3f100aca7ad4d04763c4628cd889a52598202e7e69d9a1f1ea92. 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/CANVU2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65ba3e8811b640fa60ea595b29bdb4518815ffabe0b6a23f19d22ebba6ba624. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CANVU2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695223e015246e18b100668cea6d7adaf87946f6414dd12ff3dfc7f2f40d1184. 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/CANVU2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd4809607f994c8a528fc91efda18b6efac443d05f965ad7179455d9a5c8993. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CANVU2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eaf25ef0dcec6a9d0b65810f6121b710766a52c5dde4fd86c9d6076fbf0987. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CANVU2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df609b7d4079cb4fc10ae71c00f858970ba019460196e8edc185b3743bbefb8. 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/CANVU2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1035354acc7e3d735a9f01e8306eef9daa87bb782309872e7819f9cb08bf8e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CANVU2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3933a3d2bd3b8f0d8a7056ebd2cb07f1a8d1fd4e5e551e7249e45fdb7c0a1e05. 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/QZPLR2207096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aea68ce785e1b9a4768d35b15702699908147d5abbe0816f8fe0b89af21a876. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZPLR2207097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa038b7413cd6dd5c92cf8ebfe23f214589f54ab6e8115f9f17cb0c4bd85a8db0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTAV2358587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf653153d3d6196e379700791f3a5772836ed899e219095d8795230b6e8a51b. 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/QM99V2410302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce4deef271e4a7e2ae6b9ed2d5e6c96ca3758907e8a418db62d36bd273206f0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM99V2410303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423fecfc96a7005865d2f905467fdc7ae7379897344b133b3c9526ffb01ce088. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM99V2410305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9904ce677f294099e9135ecef9504b5c469403091f0f753fc59eaeb023260d3d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM99V2410306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16f6c48013d5c74bc7dfe3c5f4b7810370916e0d7eccb90f6d90db8c99f2fe1. 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/QMN3N1300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979804805e97fa6ff32975f62b31693731549c756fa1438f883c346d1b0b4f24. 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/USYBL2201977.