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 0x9626d55747003af2d2ca295fd9418537ab6daa7ee5a76d9dda8fdd7dfe01bbc0. 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/9d4933f7-c189-40d0-8668-0830ed46b0ef.json and https://artists.proofprofile.net/proofs/artist/9d4933f7-c189-40d0-8668-0830ed46b0ef.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 0x110a399ad4f5fa01c93b5dd6a6f3df4d5f393b8627642a4540fc3b352189526a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBGEY2000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9366366447b2fe377a481254f8e95774913aca5b97ca9db60e0ffbdcbe0ceb. 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/GBGEY2000096.
Free Today (Isolation Session Version for John Kennedy's X-Posure - Radio X)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4e2bc088dd4bafd7b2f64348d2948e080eb7e4b36b467e24bb40b21add14ce. 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/GBGEY2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46031a5abd829980c3ff18885af99df292f84ef4600579fbc08b5bff9a7687f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBGEY2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db0e1f6228819837055b77936cc4908476074417baf0baea791613366c031df. 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/GBGEY2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a311e7eb035f26b93a495cdff261d8b14f4fc1f95e2f4ba73aaf867f7e994b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBGEY2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f4b64556334f1220b06dbab98084565bcd0c46e0b517b20f8319a1ca3a38b. 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/GBGEY2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4a6d4e7458a4a55f7223fc8e1328f6b8cb74dd0917953b39326c6c24c3c084. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBGEY2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf356770e15b74bee44bfc5b281125f1dd2a7a0df5e2b8f7ee302e2f01f910334. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBGEY2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefb4973e6ffdb820a94bcdd5fc84f153d397a2d142c0d5801db87fd7ff66482. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/GBGEY2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f4b64556334f1220b06dbab98084565bcd0c46e0b517b20f8319a1ca3a38b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBGEY2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd760b4b795350df87d5573ad8b7c8a2af16c041777ef54771ed9e738fa7db3e1. 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/GBGEY2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113ebbe63b492a92450da8ce08c2c628dd40ffc062119e2c11b13fcae1ba8907. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBGEY2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2645daeb8059a7d7f17d9b2207fae9c8806d5edeaceb44552259bdf1a9e029. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBGEY2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50009109a1982ab3e6a8a7019ebe94a2396c790842488a61d3df6bf612812a4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBGEY2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1173928759d24b86933b1db520f0817d2192b5c3c961b2138686eee1356be17. 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/GBGEY2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b38ef5e3558f6801ea6e07c4951ba81bfe1a0c055808f5a9c0693c64e20f7b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBGEY2400024.
Hachi's Theme (Shutters Studio Residency)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094454231b2e723db6e529b10e570a01af8712991aef8ce52acbc04a3509158a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRIDO2513623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a8ae1defd9c3a8972aa1207edba1edeb0311045105d24cfc96c458b302a7f9. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMB622200903.