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 0xa70d425b043127a1f5a0a8419ad86bd66bbabddfbed1cb72d518a16f729ce5d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f8ba0b5-b7c6-4eed-a922-eabc713cd2da.json and https://artists.proofprofile.net/proofs/artist/0f8ba0b5-b7c6-4eed-a922-eabc713cd2da.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 0x15f4ae179903f46b7970e82393f9e3a7c0fac467c16f069f1964a2c12e726916. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNWW2202680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa892bbaa98ea00cca48be6a1735caeac938f38429994e8af6ded533d16177487. 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/TCAFI2159471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf800106a0c2d2a7fcaaf500d718f269667aed92aaa9432d6b962dec52c8f7dec. 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/TCAFI2159481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf565212eaf5e026ec3fe8d13c43101fadcab47b8b593c108fdaae0950b20bc62. 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/TCAFI2159495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a3ac373b0f66bde3cfd15113fc6ea9abcf679de63a28a8eed8b63005f19097. 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/TCAFI2159502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a092d40f13b993018ffac0018c1ccfe895ddd6beeba7d22b2bf85afe4d19996. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFI2159532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3568918680ffa7a6dfe27a3631b660fab569a11fab3bc3d8a1b2060998e8354d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAFI2159544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f87385dffeea06a51001ef235699c300b4d67132e10f27e980cd51fdae7df4. 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/TCAFI2159551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c739388771054bf32ffd55918e1ad08dbc68c6377fc3635dac7bd08b58b2d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFI2159583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafd9b2a758e20537c5424a7210e8c820fa308a4f69932338cf08bdc8d1be2bc. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWZ2139441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f213c5c7a8b7bf0e535c1e75313621abb28fb2343ab03174dcde45fdb5b00f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:16Z), 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/QZNWZ2139442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5e2f7ecb9824d435ea4f7a409e65d0e9b82420be24616f72953fb6ab0a521. 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/QZNWZ2139445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b3476f602c8ac4c90b96dcd93de49dd293a26c38027eb0b24d57019c3eb8b0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWZ2139446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09eade5abb883564bbb0ca392a3638964959b9006ab01489dee36c353d76115. 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/NL4DU2000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb697a881abadffd7e79b553af7b645bb4519c1fd13a1fff8bb8112c6e89ee34. 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/NL4DU2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c771cf064f4596cc40ce84c2f1904958e9d304bb255208f580240bb44b0d3. 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/NL4DU2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f91a0226480cbf54a530238b7277e8055b32f9f58707de1cc92e4e0a5d44555. 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/GBLLT2204120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eb494a614cf295777140848f3cf9fc9ef443f127423655cc85c4bb5636fc3d. 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/NL4DU2000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c050d95a2f5492921c3fdd50f23f3285a61f4374b37718b4b1e5abafefc1f48. 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/NL4DU2000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9100453d42dec46974918f2e917035e1769b2165bd863b1c810c9adcb6ffbe. 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/NL4DU2000472.
SLENTER CITY VOL 1: GEEN VRETEN IS GEEN VREDE (HOSTED BY MOCABZ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d4245ae323e035fc396c5b38563f3974521d084dfb281a365f64d5a3f7f72. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NL4DU2000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f65595cb73d0dbf214e0e7f7f9b6e8ceb8b378979d4e42f4e9ab312ca03b4. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NL4DU2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3deb44a053f199b999d80f09deb8572d47c2780d6d170a815a04fc4babd1a6. 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/NL4DU2000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa252385765a278f6e8a218b5fb03a69b3ad8c945673ddd08f1e8be988c362a8d. 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/NL4DU2000136.
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 0x0a43a86adaeb0d68ddb8dc1241603d266b1f3229313c02ea4498c0e72c73586a. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/NL4DU2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c90717dd238f4976956c578801819c40247abffbd91eef08c7ec6248b8e810f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NL4DU2000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb1d05650fd91f5116fc34af6c470b3ed6f979db1b1eab856c72dc04e4d950. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NL4DU2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286dbf2065cef2b6904aecb0181f9bdbd1f0d00d4dcf9dde4acd05d1e17350d9. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/NL4DU2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1cec76008dc4004bf2d1eb3dcc2848796af9dfd56bd563c10828ae465b271c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NL4DU2000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67354804e62cfff27dbb93e844834f75d6392209988e684ddcfba1810c62f15b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NL4DU2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6660f021942c5bbba13fb25420325b81bd2641af0ea14c5b4dddf9666d8407c8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NL4DU2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579fc59b5a32798c5e6c6c72a5d971cf5d104653e415eddb8a67c7f647ec82c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NL4DU2000328.