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 0x284908af16d7fdb5ec9b967abbd3a1c252df680372a533838c620162409fb6ab. 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/413c2f39-8a30-4181-983f-b7853153058a.json and https://artists.proofprofile.net/proofs/artist/413c2f39-8a30-4181-983f-b7853153058a.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 0x8e6c511de2b005f7db84184945be92244fb119689784bc200ce8040c27eaa451. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/UST8K1536898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ddfb8a69104780e1caf073c328ec5ccb2034203f4ba0259b5376632823cb14. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:44Z), 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/UST8K1536901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e836a13334d7aadae63da33dec3750bc920216db3200ab87298ac0b9ecadadd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UST8K1536906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b8d1f37a6437c4000c50c6c32b83f0019c35f972a93861146a980b2316de0a. 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/QMPKX1515290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673910c22c35191acbbeef6c54b3cbbb5de0f69ea139f9549b351226ad4e2453. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/QM4DW1645075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfc8c97ad98e5262fe848a98556b51fa093a36feaf73394498755de81f50eb6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QM4DW1727042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf0ac41910c5eef615db68f7b833c5a16754894ee0d3e8b764aaaf28208db2f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZCE61828244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dbafeb986fee2ad3271b3d0d5bef040cc0d783365590a4f50ed85106e111d6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA51823305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4cbc40963b35478d564faa2ad45e2239718a02b5b8064eac11fb75bc4546e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA62093495.
Score (Rags to Riches) [feat. Dane Amar & Anjubie]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deddf578f00ff2fadf6491abc1b97df322f6c0ebb0298b78d9222e561aff7dc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:14Z), 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/QZHN72149186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c0c6a0eda90b0903a735f2e946a422e846ed66d8b262f2912c7ad71ddc4ffe. 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/QZTAU2144777.
Blame (feat. Linda La Juicy & Maddison Milewski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c60a7b584d3d3bd0382f86dcf5eb1850970836986de7a88216be83e3ecbbc7. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USLD91739085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e830fdd11529f5920bcd957569490660d8c5dffb93fa89be0c4a2a67dc4a94. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZK6P2335431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0bde20e4a1e3f607d0966e65ce84222f08a14dc78f124c58fafd1dfe0c033. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:37Z), 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/QZK6P2327055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406e3773674ce6a224149bbd4cd6c6bd73d58d2141ed9a47927b613c1477c6e3. 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/QZK6P2327054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55853fdd56d4defffa3ff9621a515c4d57ac4b3444d044f2ecdaba63cf961a5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBA2398449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc162340f5bffebb9bc848150116faaa933174f5f5ba6f477c9b7e6125f8fc6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EX2503422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666dc0fac9bdb73075402e6b0ee8780c7ac4848c1fd0ab828e7ece226bf18e5d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EX2503423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbb8d77126edb560be2f5b49bb7bf694636c843cf2494504a3625247237e1d3. 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/QZK6F2200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da9f97fad73a311dc7b92f035bc4219f27bbaf4c4861a71503d2587b08b7fa3. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZTGW2100401.
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