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 0xb36e7b7620c6dceebb8bcbfca361fb46849c0cb0c8a57585df34e842e69ac302. 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/4a43d5ab-230e-496d-96da-bdb6fc21dd80.json and https://artists.proofprofile.net/proofs/artist/4a43d5ab-230e-496d-96da-bdb6fc21dd80.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 0x5b6f5bf9f96acd63ad37ec5702c5fef1621f6e972c3c6d97636603d945b9a878. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BRCGL1100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d06ed05896d6ac3305c09a0169fdc28b7de05d0bef6d536bc4945ddd6f45a7d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRCGL1100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1447219a4298cf456e2b5a1dfcc2cade5aa01efe8dfcec25a45f5c2765e8d57. 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/BRCGL1100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d3a4f50cd699f20f1d47c5c2f9856d45ca282a99730b5557882862e7da171. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/BRCGL1100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7e292a58ae415ed66732ae97129f9bb13a6ac0a7ec802de4219369a326fdea. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BRCGL1100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4795645f2aaae0dd32d5fe7f21a9aa89a97b2a4971cdea110e4fa3df8ad5e7b1. 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/BRCGL1100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf359a1a8701cdfe21181624a2663a9308a8dbe5cb407a3944884e1d25d03850. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/BRCGL1100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c338442ff3eede0a0a08ddfb82d50d5d13be607f089a831a27842a1f6434e18. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/BRCGL1100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1795821ad89f99961527c87a40100a12c48d7427666a49c15c3dab8345be7829. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRCGL1100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bf1a04093dc847360c8dc1d7db020de08c9bde161f7694e2b66f6bd09926b3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHZ62066933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6668308e3b17fa426f91e2a988d2712c24f1b8f01f35a37f4d94f491cca7bb2f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZHZ62066938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785099624bb29d185fe7c3f55eabb8bfa32003c2e37c96666f1e6c9528a72226. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRCGL0800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a223317c8c115dcae3919415645f06baf8aaa36cd5a8c247917fa28cfa5eb0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BRCGL0800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ced2c334f3a7a8d15ceeffb2bb770ae8eedd5dc629bae712cda991f7c2d3f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BRSQE0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb054852f0498059a67c1a4121a1c6c9111e93ed56a37de7e92887e9721973a. 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/BRSQE0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1656c131a69c7f2e8f985f15662ab95b9ed8694c5a1ddc5b5d2317c2a001859. 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/BRCGL0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a7b6e8955ff68677d4077ac3ecaacab4148e16ad4f3f7ffa212ecdf2e69574. 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/BRCGL0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7445555ff275a411ca2e2c1b9ca1abd75ea344471dd03bf6da7aff92cb9c00fa. 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/BRCGL0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a77afe2e37be40f013d5be8feb12a156b8effd9ba545d3f2725d074011556ec. 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/BRCGL0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc169572b7a507a187de7ac861ad2ecea02794851e8857f9e2cfd7dec0d820. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRCGL0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944520b7286c6a620a26b94f9df12eca68009b882e8bd6e1d456f945cac04237. 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/BRCGL0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05ce43c281c2fe557671474a90149d751bdfb00d73156a731da35e405974e74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRCGL0800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67bdc0ba954b65a6784ccef4febdf1b0eb8f71aa6a46dddcac025a1217c5e5d. 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/BRCGL1300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc633c6f9d01af9292a598db5356e75a4678ef2d2fc2236aeb38a752127b55638. 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/BRCGL1300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993d6b16e93c6690efebbb75004b52b426f84f663d543c7798626a4e5cf72e5b. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/BRCGL1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb24fdd345234f93e933e2e9d12a46865533a291d8a960659af07da3f850b71a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BRCGL1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f054ac03e48e62cd29def0178d80c58106601c7203aa46d8118f8e502fee1. 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/BRCGL1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8a0187f5529ca046be7589e3d1c4943332cbfe5bd9c0bccd848aaf99f8c57. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/BRCGL1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0dbde9d8190418b13fc9ad833192ec4d260bcafb5fbff41b095dd199e1567a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRCGL1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18843b146cabff83340c2b3fd156078821225529e5001198c61f162c6518c46d. 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/BRCGL1500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d49ba2c1e14a5d6eb5896dcfd1b23fe614c563eeaf5fca652a7620845d2187. 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/BRCGL1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee02fcacbabf241e6a39ecf66d14cacb5514af167652ebd0e991e06140a268. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/BRCGL1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1acd215b650aa65078c81b039a8d3849984f6aefdd3dee5c1aad942d713e9f. 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/QZGLM2124937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756cf6838bc5bc6b4a6170ee9e748b1339f69ef54d806ebacc75d565c9b6e48. 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/QZGLM2124938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaae90aaeba7186a782f7bb4c95de19414e0b26b2c33d32853c04ac322aa3a7. 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/BRCGL2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45295e76110b69b17a73970ea04b5170f105450516e6403fd48ae01a1db4d766. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRCGL2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bac7a10eced70f087117e5c45ae2858b3f878ce62039a80c155a604a0c4b30. 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/BRCGL2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58590d8f8b99e462a643f48639c69e88ca2f887af9ba3c6b9108c3a1eb2089c4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BRCGL2400027.