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 0x441aff6c5f317d32679ea5fe9d4318bc435b921913fddeedb265eb82ea9facd2. 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/67f7a085-5f9b-438e-b4f1-6498211c97fa.json and https://artists.proofprofile.net/proofs/artist/67f7a085-5f9b-438e-b4f1-6498211c97fa.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 0x98fdd79e6ff333646f2e500e77150d3026a00c02c6c9c6681bd11d2404d44c45. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN42143020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e70353c1a9079ef4f08e64e290aaa84bc569a40cb75d7b352dc58df7829d5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42197782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82f83296e0e39fe49b55d4e27a68901152df5419a2ee08521fa7a5aba08a3a. 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/QZHN52155098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beb28bb6f92c8ae9fa140b2d8c842692dc732696cee257bd5fc833350ac17c6. 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/QZTB32289934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a944122005d3e87c7556d3c969e79728e61b743925eb2e89c9649c89c20a70. 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/QZFYX2384007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2083a9d8a9b23a8f97d03c61765f8f154ac750a4e3e7255d9cda49a8989a7d. 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/QZES52315473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feccfddacef79cf7dc7d0463c22cf73bc4e6865ce6c692a3687b6430c044e78. 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/QZNWV2395504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cae0c2809971a246cacb2f8bff7577528e5fdd837b5304da6a0b53cb15c105. 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/QZTB22334722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4513c2472e874c05a1a885a07710d538c2ce98e3e09df2333e438c664fee6d. 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/QZWFL2318187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b439a6e489e7cebd88498a27b76f53949bef2b15728e109e0f1544bbb8a6316. 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/QZNWQ2487915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cd0f6475f87c64190407faa41e057eb8d39f50bde4f10def8bbcd1d53bbabe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTBD2450193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907056391dae21dcab7e767e4c01782f9fae3146b69d2fe85450e352b2636530. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZWFQ2452957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae53ee31059a97130fbc49dd3ef8d066108db2889de39c02438821843aa2c11. 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/QZWFX2454347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f4a96684b5805348098156449fad6901afc9b76240fde187c9c894fc3d94e2. 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/QZTAU2552882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c24500d9020956b353538788d75823a35783c486ebd16f5ce4ea0d61e366678. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ782558150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff369a679fac6bd2f7c7ca089a05ac35a21dcae4f43017e50e77661ab6f6258. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7V2508847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e022a1b18688fb58cc49785b57224507fd0647d9f2d10f2acd689ec714a2a. 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/QT6EE2588195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c49bdb36314dcbfa2bd2620c705ef05e8069a0b3af2e3b8b8fa889191bb525. 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/PLF242210558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca3433558d17b208592c922c2a762e720444f5649c008ee567533bae834739c. 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/PLF242209614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18415a0d3381539ccbabc94a965fb4cdda049a779b2ca58c977bab633878504. 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/PLF242208822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6dc11ffecc8912f0ef3a856bfbf3c7a29163c5967eae3fe5a2660482622857. 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/PLF242107595.
Co by było gdyby (feat. Sadoch, Bonus RPK)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9283ce840a712e8a58893aa24a5148e837766e5cc7b64bf3b256c38941229a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF241906632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d01dd16c3f629a8088b9d70d2347877dd9659821ffe09f41e37c7f483183e00. 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/PLF241704199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ad9b8aa7d01844a44ee67d49d3d4204f2d86d87af24d1691a22d10a4d6ed74. 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/PLF241704209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ab2da7fbddc456460e6f3604358024fcd3938c41dbc037c3624a4165a5fbb7. 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/PLR902300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a6eb0dee028b9e203419efb66e3254dd6f1de31bdeeebf65ba323d999f5b1f. 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/PLF242209847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a84cb6f61ea4008e84aea9b2be04f8fa1116c412412f8f637f7146ed42253. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/PLF241704595.
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