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 0x5bd061fe789c2a945a99c163a52c2b130abcec85b00b210998135b74e6427371. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/344a060a-ba6c-40c6-bc44-8c9c50f76d63.json and https://artists.proofprofile.net/proofs/artist/344a060a-ba6c-40c6-bc44-8c9c50f76d63.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 0xc9643cc74a40b7efb155a0f79e5fb3aa3da81c7695fe26f55cf9ab0b5eb4349b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBSMU2055947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0df80102543e881c0c98105d78f8ba3572f749ca389eb576c890f9161218d5. 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/GBSMU2055952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90af019da4d85852a0692cb6a5a533745d8dbf07299a757ddf08351b0c4a45. 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/GBSMU2862879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6bce12a55648e3fa13ca545ba4c73470dec2faa8b6964c0f528d7db6f19907. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBSMU2862881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0690e098d9337aba38c620b2634cb28fe2c43f8126df303d2f1249d769c5d839. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:21:38Z), 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/GBSMU2862882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd432295f69fe03a751590a1bf0e95d0c0311db043c7a0d80ef38b0309a188. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBSMU2862884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b11ed745e6ea6c786f71d340b74c257fda82942da800f302760545d2c4a6b0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBSMU2862887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfac48c3a4e7a97aaa6a10acba241291e80cd1f541db691d330b1a39f72ca75d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:57Z), 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/GBSMU2862890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130cc4f82a7ec90f855a86c2f42565d10dddf9529fd87565b4a3e98959bd62ad. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBSMU5658764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ec3a6598b5d945f401ca83793b8a88bcb16776d47c09fa004b7f5c226ed0d5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBSMU5658766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895e049b7ec50b3dbceba13c7c56461c07880ef1135277e59704a142e8380bf. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBSMU5658767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b23403b90e1ccfdfb372ffb48857e24c4f25c50ae536b209fda2f7e7a05acc6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBSMU5658771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30fb52e833ae07d56c554c4d42aef5124b6159ccd67d27a2056e3bb1262be3e. 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/GBSMU6211945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8c6f9488f43ee76eb098ccdcbc7f29edc2eac5c6fdfb8c1787549e4cc03237. 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/CZCL52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b4b7d2b72208d4daa123374ab8e075e30ad239911f2a6f3e6ded3a80dcf70. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZCL52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3912e38bc58b1571f1c35f1251e1081cdfa94818472d0681172abf7de1e187b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZCL52200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d27ab05c7c1c7aa38749ecb2afa0e059d4097ef97a1ac9b85ec51b30d349f4b. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/CZCL52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e5062f4f08483860a1118c320c25bdcf06336e64289fef312758f7e760ff8. 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/CZCL52200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba2f9031ca6bc43ecb5996c418984871d4a95aad59d0b14a33a7afda8e1acc. 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/CZCL52200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53404cdbbaf91a4f6ecd2d3760618bb80c4e9ea7be9e8cd15c600fd6bcd3610f. 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/CZCL52200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c1d3ee25109a5c6c6c8dd65efb9fd19d6efcc78cc1cbe3373f9601a34f0a77. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:04Z), 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/CZCL52200005.
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 0xf24164925c04dd2b0fc1e0935016a36aa30acd56f5b53ec71ced0b622be1f88d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CZCL52200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fcd95729ad34c62e43654940b41dd5eab6728eb2e2060c2520483b12f2aa87. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CZCL52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362ed47970e9548a76589a6654bcad15fdc0d13032d17dd31cf361f0e0396325. 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/CZCL52200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd397d9785359a97e35e054acdc7d70ba93d8acc7b09006803650fe60c5ad855. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZCL52200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4386b54bc422f01a2b4c1566b11abd462a44e62c330cc7deb6fa561de2633ecd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CZCL52200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a7f836fd43532742b5d44268b0e32a62044c795e5aa1bd0614ee6ba37b16e9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CZCL52200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6907f5c0b8e87531aa179d419456668fcd5edc2ad7906779583d8bedb02b7d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CZCL52200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408892f0c4ee959c4114fea026ec254087e2305bf080e6bf0260e8e29ad0b729. 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/CZCL52200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446912e9ebaec3c712e631f93d7cd616c2285005baa7cef3f0b1f556fd491711. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZCL52200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b6473aab7eddb41be473d23960b73417978d9cb433385d4527a08697c6934. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWV2198137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa813a7acee40211572d20473b84b57ee9e72224281ec0a0acb7833464acd5f99. 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/QZNWV2198142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde5c1fcaa2a9d402ae2f98b0bb0fa4af00000fc3493820a7ea5e8a16c1bce40. 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/QZK6K2376836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be1b07c9a5bcafed4b2d6831b87d55576b8337e087b7d2ed5d666923bc47271. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2198556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c3c93ea9b8eb32b41d1f935ce493ef00edcbd4b696d6f66c4d731d85f699a1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR59R2197265.