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 0x8e800e41e0fa714f8a96d5b9f1e942b40a519abddb38e993bd89b9d00fb1c302. 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/e2c978c5-ae51-4272-a37d-4ea3094c795b.json and https://artists.proofprofile.net/proofs/artist/e2c978c5-ae51-4272-a37d-4ea3094c795b.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 0x7c601345b0e8edd2a18e2be82ff116bb623e261ee5fca8eb8bc31c780f06a787. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:30Z), 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/QZDA42516379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9a3c3e612f5998d5c6ef1a108328c6de7e9123e57a2577aa61f72f183b755b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZDA42516384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7188cd6e75f3903a5b227e94d69154a8ac19bbce60e3ce4ae7d304490edeaf63. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:02Z), 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/QZDA42516381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d0c9fc619682b5eedc0dbc9712e3a5fe0f5335793e2fe15a2b781ff9eb385. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZDA42516387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2389e05b73b0cdd38b70ef22238e899e64f729f818531b6f745aeb0e37b26b57. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:23Z), 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/QZDA42532983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b15c55fd52bfebbaace661726dbaa7d427b66c11a1201c1f2b30c2c11bab90. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZDA42516386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2beeeeb13908b4c1c2fb780db18a74b63fc607c7163a2edb4e20eac353c2af7. 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/QZDA42516382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17b579f6c7559da348d7fd50807e54745cb6e109df54dc948ce2f093c95741d. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZDA42520190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e16ca681650a8f051d08191ca1aa3c263b59d8495a899e2d13c453f17cc683. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZDA42526741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea2ecc272e88373424ce66af4fac3aca037ac50275e854ce7281e237430702. 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/QZDA42516388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c5d53a6a754214c362bc53f253dbb63183485ab1e8431868da94e42f7c34f8. 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/QZDA42516383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a2c598c68db38a78600e9c838a3d68b188e05a6a6ef2fe80c1cf1a1be1381. 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/QZDA42516385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83c54de755ec0bcaec592df53611a66145563f380666beaed2f7fe163454b7f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:58:50Z), 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/QZDA42516389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e232e8ca3ab506e407f13ebd87ba50b6bfaff817045ada305e41ec42330c63. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:22:01Z), 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/QZDA42516391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa547d8b82d2ea47871d7fa8754b40c039cee1f337e628e177206f503b807520. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:56Z), 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/QZDA42531110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221688e4aacd14b621fa626ee3ac0f2f29a86c10f399e2eaa9b935b8ba7ffb7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:18:45Z), 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/QZDA42526742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae9995dade7c48cb7a00e596b8c3c33f77295524e7c0f28dd0510f848f3a41. 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/QZDA42516390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8984e99205a407ed08ee17b0c6517170c9994ec31bfdd590b3a3fd48cd3e3020. 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/QZDA42524322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161173a2864e15b9bd01cb14f8eaff590d57ffe26c8a25b5d1e8e6bde7d8f07. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:34Z), 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/QZDA42516392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165c1cece75136440732067a094679cfe0c79df7c4eadc2967487c4edfe4fe85. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:24Z), 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/QZDA42529007.