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 0x195d6f4350d0c1845b2e327f72ae19d9a3cfbae4d321e014ab7d35f40c8b6464. 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/35801adb-323f-45e6-9e60-3a1fa0127516.json and https://artists.proofprofile.net/proofs/artist/35801adb-323f-45e6-9e60-3a1fa0127516.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Grito de la Madre Tierra (Andres Bless, Maure Om, Nejma Nefertiti, Gizelxanath Rodriguez, Amus)
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 0xfabad509e78cc3201a38ecdbfae00922ad6a4a8630933174af9cd5fa3287ea19. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEQ022118245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247f38b2ee67f9c326a1e552b5334a3b02980be68eb8ea7815d65a8ab9065278. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQ022118246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a632d07313899e9f07ba2849d0c845950375f040c3586580906d30286dc0c7. 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/DEQ022118247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be28b00c9afcf6953b4c4e9442fa88ebbb87e71b69906fef406c9a63c7a5309. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/DEQ022118248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aad5d78707401d8965ce6c88ba32a16f6f992c8c5baca597ae3f8b1f9d549ef. 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/DEQ022118249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b968fd862fc8ecd904afd88bee9effda83c6ff0fe1d613e67255fa36ae70fb. 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/DEQ022118250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79063dca2389bf5a3861293f1ba3519bd186dae53fe89c46c6a52c5354e49d0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEQ022118251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564dc958cf097e71f7482e4fb4ebd3663f70ab022ca4bda4b523f646cfc13f09. 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/DEQ022118252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac90325b7b5e8d3b215742e0127a5dc44e6e7dbfd94d42c6eb24a8643a4c42e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEQ022118253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da000b891b2e28f99b062d0c55982b5fe3f02fc84295e94cd7d9c396328f347. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X42554496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a18879e3674fa8e6ec71f99fc885bc9280461a267b869a52cfdc7ccbc5e21f3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR2X42554495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb9cee4d12bdfddde01b69cfbfd11a80591e91d134d934a4aa65d4d5234a743. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X42554493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a37f6736362dec12e408d0ea49d4119e7320cd2b092ad934cce0a2af1040a63. 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/QZK6G2360784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b10fc4bfdfa79932280d55203f80ad83f8654b40de2d8e72d6c4cb77460c5b. 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/QZK6N2442695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bab1d790b8196022cbe0729a8d24cc0f7b03ed895e44d7bc446bc113baee87. 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/QZTAW2218309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b1575554f05b3dd28ad9327dfda73168e46d53d84f124f5ddd79a72b836b8f. 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/QZHNA2382739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a11668c2654dc944113c914c8e2ff1b0d7a8e205072963e20e9b69ee2dfcb2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BEM442300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d27e7afaca31a2ed5f62326fb7c48635e2e5bc0e4d6c2130a02ae7c9915d76. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR78R2000080.
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