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 0xa2135ea4768eebf8d9d7093d4e2d2e26d79ea0966eb1f2368269f549b7f4c730. 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/aa3475c3-ab10-4e38-8d14-0d1c8b65b372.json and https://artists.proofprofile.net/proofs/artist/aa3475c3-ab10-4e38-8d14-0d1c8b65b372.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 0xe016d9abe18bc8a0db41dcec3356ab5cc27849600f2040a7ef2de36e6d9abf9c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZJG52138047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc815c20c07d0001072d3d5f8b20b09ddd30cb4a1474152d02c0a8fbdebb0d. 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/QZJG52132615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429632d901f0e0e33b0bd0a82f154b208fa1be6b5a556ccc2a5471db0558b384. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:26:07Z), 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/QZJG52199947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa38a674eb0a7c655a5b4864ca501baef48999ec87c0d1138c5b7dc85eab19b. 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/QZNMU2199937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d192327a7c77503ec8fbc2bb57aa76da2fac362effaeaaccc06af81db8c6d6. 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/QZNMX2156041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cdffadebb614c43886c3098826afb4d68f23ec53e15d1e6fd276ff7d86549. 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/QZNMX2172338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb069c970f16777e33095f298057b07e79454f0f5d91dfee77fedec93b24e89. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNMX2199903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2677fa188819dd69ed34c6d5feb294ba145a68937e73c4ce61b93bd205e953ed. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:30:08Z), 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/QZNMY2188630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958675003e051212dc4a448bc9a6184f6f397b8aafde5c612fa1dc2fd0882d48. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:25:03Z), 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/GBKPL2175212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b6a8c3ce4f11aed268e25d73f3ab2197b8c98d7c42814710a636f336dbe96. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GBKPL2177499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39de548eaf26b7f534a5cb59ba9ea2c3e46cf40c6f324f1dacb0a272ebab64a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:20Z), 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/GBKPL2278171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6f521a7d4908cc09069edc5720f304513cbae48b5c5fb97e174816107c8e90. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZL382269085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73995ccc2929e9242c7fa11f9150e6c550bbc3a43b9782e342c90a21a6141f87. 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/QZL382269090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de84a68dc6f9457d11fafa78c9c38df26285bce3e9848d686b0a4f04d35a5e0. 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/QZL382269091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b0cde6238c6bfa4e97a0e064f2404353579fb137066cb6789b5ac27e2b4ae. 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/QZL382269092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866376016de122cf2038384b1ee3417a8fd5a66ae4b5b214cd228ac9cddd67ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZL382269093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890916b4d7cf56fb8eb28de86d8ffdcd437d1bfaa4a755901d3a4cce42c0a54. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZL382269094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c138c056b70986d6cd08d7aeb3277e9297ff3733a99380683de8cd33735fc5b. 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/QZMWW2219438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6fc2ad178a652ba8ecf20bcefb551e9d8a9314a00bac534b679c782607b736. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNB82206499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630f1fa74f4952d32d36bb894d01590290d11b782c31db5b21b4bfa2a7cedb9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTRX2339039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639d0678cd7831b0234f4092bc74f8e42369b9d698d6538655016c3571977c36. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ8A2394707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bdf0c71a31a848c3cb8a50559237a249d3cc68c3e130fee6fc53327415053f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:04:47Z), 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/QZZEC2321555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805915a99eb4f5145d03f219e940f9553757f354abfaf6da54353538cbda80cf. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTRX2566162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78df7195887d293592c779c8d618e664362ea103cd68d3bb87a9db311a9483. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTRX2566142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78df7195887d293592c779c8d618e664362ea103cd68d3bb87a9db311a9483. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTRX2566142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805915a99eb4f5145d03f219e940f9553757f354abfaf6da54353538cbda80cf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:56:56Z), 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/QZTRX2566162.