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 0xb8feacc9070185852a37da7cb252c03ab48adabb2dada64b8a8d2a33a25dfe15. 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/372dac6f-c840-42c8-a5c1-7ede3bbf97cc.json and https://artists.proofprofile.net/proofs/artist/372dac6f-c840-42c8-a5c1-7ede3bbf97cc.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 0xdd57d27d39b9414c33d2fb495ff78c5a76a96d673d9796c0b5c160f61f735a26. 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/GBKQU1880123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd348eb0d575ec4655b43c6a538f16827977196a59cec17f04d2fc59e000180d3. 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/GBKQU1899459.
Losing Myself (Simple Jack & Black Soup Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b853c4b32298cccb910bf63ff92102aeaaa436fb21a430a89896a2f436ee4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEUE12086077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba164c14bdb9eb2925b0535de95f2c35b0df8d4c096f3531899d5067242ffc62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXHBP1900925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9336b24e73fd8f8740ff7582ada3bd42f376a8fc3cc8ea364b691a2a584194ae. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BCVO92300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff0e7a8a834a2c37036e29cd2353182a23a3a37e7dd8bb110bdf31042f66109. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USA2P2345319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873d8f08bfdca0a8aa604626348cc7f300f540baab816a3b16f57e26f6b10c42. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:10Z), 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/NLRD52319558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a278dbb45d17915439b95d72d5419648e7f873481f70c8ebee3b99b9bdb2ee2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLRD52303892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6ed47d6409c099ec71bee58bacdb0f45084641732e661b4624af2485b04e32. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:50Z), 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/NLRD52303896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca52653c21a77a2b71ebf5d810b1a76e2f8a07382b47f360b0c7de678e115c5d. 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/NLRD52357584.
Dang3r, Kova & NewGapy - Down (Black Hertz Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2d650255f2178c3ff12ba4d9da7153a1e9fd96bbf2b37c06b180158140409. 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/BXHBP1900463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9174f5acdf5bffce6e33abde39b89e6931cdd5239ffbd859839cdc2d4667bb. 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/TCADP1875835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7866cda712f3a6df560205a1280b7636c76179a207c9707eab070964ba82a4f9. 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/USLZJ1953232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcb09275502a91347d7abdb3ed20d26d67a9744e0f9026d5071a1c706eda88f. 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/TCACY1705749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c35fb37eb1575d9233a21e35c2feb054eb028c1ce57843137bd0301812c6e2. 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/QZHN82422382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5d187da6a255c42dd9bde10cfa45cbc093bc8ea39d58fc5eaa26361b54a79. 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/GBKQU2147354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1ec87c3ff7b55ac3d88a4b127eaad99dedcb59469aa754619e88ac184c12c4. 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/BCVO92300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b73bba0124f5c42e40d873efda482a118085967b5cc87e76b541f9780c3c1cf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEGA21802583.
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