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 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 0xa59ae64762df6c7a8212974e8ec052f8f5bdd2a49fb47da23db06787da00bdf5. 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/ba2be075-9280-421c-9ba6-732980f6205c.json and https://artists.proofprofile.net/proofs/artist/ba2be075-9280-421c-9ba6-732980f6205c.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 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 0xc0706551408328b05d9be9b86c2b175f0ce65ce9b9c1935381c2020c177833c2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITBHZ1500724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd861d8b640bb5027da1c911ea3849dda0034e239050588e4ee5fbdca83262bc. 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/ITBHZ1500725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e40c5a9b330ae60626def71966128704325e7af38530d4e855b33b35d6dcfb0. 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/ITBHZ1500726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b25ded19c1cd5e8f0cd03c141464a3f98e4ea1b16fe87b200d534dc300c58f7. 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/NLCK42233655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9371fce0b954963b67b0a0c9b940c80cd06240368bbf8abb5ff9e859dff72987. 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/NLCK42233656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477f249e0537416e8971167c3e2eb74c210f3ddb190fce0ab2dcbc702c94ecf6. 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/NLCK42233657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10987e10156f3a5170dc7cf9e8a9bba8152af0a1f93cde31c50781c6142ac63. 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/NLCK42233658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c54833276985fc0320a974855f79dabc9821602b86d26c14b59ee58a2813d7d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/UAAR22100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1836d5cdf60ded3087726243e9021c8d317ecd9b2359f87bcc9ce11bc09ca1. 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/UAAR22100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edd121fef82d4413e19241a0de49aa764a0d710d9bc4d2a98851898e9fade47. 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/GBKQU2090147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b314bf0c6e19753dcf9aa5da7894a3be03b59b1a941f445f9d5441f98a8f7a. 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/GBKQU2090148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326738a20a3ac5d68e4d9e69d8478fbf6ac2fc7038639fbacca1e2ba2811f65f. 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/GBKQU2090149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16115d00eca6de9d43b3313886cbe2505f64e252d6604cd4f812a682e9cccad3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UK6GD1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfe14928e6c44a46de83aaac62577348db3e481f6f64f8ecb5dc8e1c9a0d0fd. 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/UK6GD1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62852f74947048c35b401f78bd9d632c839c84682964f0e354dc74a9863a7f8. 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/DEH741819645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8c1088bb23aab691d15dbc4dfeee31acba4b066e68104105e4f0c98b7e0be8. 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/DEH741819646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07e4a14412d3e127d22acda9680d5c5bb2c27f541e014e11a253e3e24571235. 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/DEH741819647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f4eb83cc08cfd30a302e341b1689fa985eb716ff5286efcfc7c170c2b4705d. 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/DEK601820104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa3ee29537c2fa2549b5a0cbc00cd91e88a59d756987fdb58c32e21800685c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEK601820105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e52cebb96de13031bd9510325c48bbdff8bdee741c7327b3ae95010f90c130. 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/DEK601820106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52bc66b9da482ad6d2b43859a3ebadc53bb3d9b076747c06444811ec646a89. 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/NLCK41037370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0935db97ef7aaa8f1401c2e8fb97a0548ef20cec537a3ba79a6a9cf88867c5b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UABI11400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d28d2cf8ab94d62ca89398ab2241fdadb5dbb9b10b44b8e693989b886c296f. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/UABI11400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc113b566b168bbf11c07f5ac33ece2350b565ccd022f07f5a4d622c3ff4a2a43. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLCK41037427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f8e6697926d5517ce639253b34180cbcf1d8f8f69f0462efeab42e8e600a39. 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/NLCK41037428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc379f09b12bccc9242cbe014b21c023b1cf26bb46dcf78bf17a3e89d50bf1f. 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/GB2BM1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b327eed2c4db0c4767040c82b4f80149ead6117aeb1c3899fb1c868bcd237. 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/DEH741308579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb69cb765602456d87d4dd33b42d185f70862b89e6c42b1ecde8cb27e1600236. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEH741308580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf1a424bf5abb7fe073b10623fb3959c4c1d13c1774764b1a7ec147cf6e85e3. 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/DEH741308581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bcfad9e97a7a94bb59964951b02c13e9668f18bc6c44f71c029e45c105e1a8. 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/GBTEZ1300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf781ca0cf92e4a93325fb1b2aa7f55d14a2e85e2e035ae0b67631e16b47f7a. 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/GBTEZ1300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d5acc726bdb5a76b2c52c5501159d9c1a1e338bc56cac8ed6bc590b8b5c912. 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/GBTEZ1300629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b6fa474cda69f44661c2aaff2cd87d5db836ae525df6e1d9279bc579dff64d. 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/GBTEZ1300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a05d41f16cce0cd6ea6149a14d131e306de9e8ff724dc250cf4a426d87e814. 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/NLEW31000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebe8ce608a09fe379fe62b919ce9aebc4b01bb0b4c04a1c635ec9a15382c630. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLEW31000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936e66b5501eb692ca1d06b8b521daffe397e81951cae5ba430be32ad14b9f69. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEDH70900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba2298b94266b1673f1928fbb69a0484d3f7b60fb1129e3d31906c1d31d62b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEDH70900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4029e3f5a26817c0a3ffd31fbd8a2c1eb09b4224445d42889f21a956920efc5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEDH70900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bca005a4d9c0491764e45c6ffce9bcdd9a503aa3163a8e1b3813fc6d56f578. 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/DEDH70900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054dab0eec8731f15f9010ec610840f02820fb17384cfde39ba13c1333bac8e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLV62207670.