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 0x53d2c3d0f34161f9a267d6a0651df51d3222fe73c26068c1910a03629f1c9bba. 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/172a444e-11e5-4936-bc5e-b0c83ab26482.json and https://artists.proofprofile.net/proofs/artist/172a444e-11e5-4936-bc5e-b0c83ab26482.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 0x9b283c0fe55187916391714d804cb19e33b4531974883b363e8f8c93462b430e. 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/ZAA012300013.
Imbanje (feat. Zan'Ten, Phoenix & Papi SA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ab53aa2236750cda0b07ee4e813e28b77a94fbaebee25bbb6504cd3481effc. 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/ZAA012200258.
Ningalali Emakhaya (feat. Zan'Ten & Ta Skippa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20658f49dc97df118838e5e48a24e7ff91fa8b2d79ec20c0d6b3574ad18d3fb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAA012200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3684322a767db90e5aef4256f7e83d9f2ba3b0b4ad84f55c839e403a38651e. 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/ZAA012200246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d91765bacffd9c5e252087f8c359acfafc41cdbc98e12c2860006334897929. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAA012200251.
CEND (feat. Zan'Ten, Papi Sánchez & Ta Skippa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a5df94d3712f81d7ce217ccd5238a62f6161262922fdebaa086b787e3c9af4. 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/ZAA012200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39de53d337eeea25ff867eb8ec35f9ee165a155159114fd3e877d3152af4fdb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ZAA012300291.
Kilimanjaro (feat. Justin99, Mema_Percent & Mr JazziQ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd777790a6dd1e1320bdc9119a7bd27a19c8913d98603f6860c049bbe85ffd28c. 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/ZAA012300016.
Nazoke(Akana zol) (feat. Jandas, Zan'Ten & Sgija'Disciples)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19edf4d3eff6216ebf8fd6f347b7224f233b1db569fb19d858886bf1370af881. 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/ZAA012200516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20658f49dc97df118838e5e48a24e7ff91fa8b2d79ec20c0d6b3574ad18d3fb4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAA012200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d91765bacffd9c5e252087f8c359acfafc41cdbc98e12c2860006334897929. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAA012200251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a233a43135f20bb0e8068873e518c2cbc65d8e4a7606fd593e205f20f56b8c. 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/ZAC012300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eab954462d52f3320867c307addfca2f017548fe44df5b7dbddc8f46a68aff0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAC012300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ccfcde09ebac8ddc943f65ef18698e769fe47782648cb13f023977ed19a26d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAA012200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1223d7eef781d56d1463232656a318cf8c0c7760e4d0e1d220daae0943b27709. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAA012200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1223d7eef781d56d1463232656a318cf8c0c7760e4d0e1d220daae0943b27709. 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/ZAA012200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330b419ca0e5dc8436fc040c07266b06dd78c06159a4d0de55a832cf3f8f89e3. 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/ZAC012201074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61682bbebb02845228beb2dae946c676068dff71a0ebb9e5fe79defb27a40cdf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAC012300332.
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 0xfd45be29d24dd78f9999aa8ec939dece3cbf86dfbc4452d7d409a70b7962ab0c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZAA012200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534d33f53f436174561f5697fa4fa6344243767cd0366232e2c4ba949c83d567. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZFZ42329088.