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 0x785ee0f48b31ad2f88594b0e78e53b15533f36638521d349458e0d2be9e31ba5. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dec1c727-75cb-4f5a-b31c-2be1028920ed.json and https://artists.proofprofile.net/proofs/artist/dec1c727-75cb-4f5a-b31c-2be1028920ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Obras-primas da música clássica brasileira
Pereira, Villa-Lobos, Reis & Others: Works for Guitar
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 0x3a0edd14a1ea2b2620c281f0c81b009777e2a22a22abfac19a486749eaad792f. 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/HKI191944301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cddb09ede3365571b9e943073d6847dcf9663fc8e45850788ea011f5865f974. 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/HKI191944303.
Jorge do fusa (Arr. P. Bellinati for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623d955c74c3288e0c331d30e991e79594fe64d88a0eacbbac1d2231bcd66b92. 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/HKI191944304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7927be58b651cc593af44c26b5ff5935361dcc04f4a03dddba8234791eff982. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:19Z), 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/HKI191944305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb966c99a0f7eba5254f050081b82dee407418dda5f10b4bdfe78cd98334447. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI191944306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe183b7a20479054aaf5839e947816608c243d6cfa745d0d515e69984c0725. 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/HKI191944307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26fe96822f6e13a0434556ec16f74df01c344b24fa1dbf251bf8f3d48435e6e. 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/HKI191944308.
Suite populaire brésilienne (Excerpts): V. Chorinho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c9e1c001f7f8fbe5378f253674f6afe36d1886b8aa0ab25d19d8225b1ce353. 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/HKI191944311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795257001090630fe9277e22168d045af60a93c2d31c1df7656755625f2176e4. 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/HKI191944314.
Sons de carrilhões (Arr. I. Paschoito for guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36645f96a64d48d44742b6dd66a38909f94816073476f3405be0ab1c702dae73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI191944315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a33d41f7875000c70d5d6a18eb7a69875a888630529fa84858a3523af1cc0. 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/HKI191944316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d79574041b6902f3afc2fff771aff22b96b1f8fcbf134545a95029efad3aa. 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/HKI191944318.
3 Concert Studies for Guitar: No. 2, Toccata em ritmo de samba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63da89f99c59abcd136494381eab7b321cfc8800383c183063759b5b5cfcc6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI191944302.
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 0x740d2f1cc967ed984d384c46a9266dd9c0b4ede2c712c3eedad268c5cc4934e8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKI191944309.
Suite populaire brésilienne (Excerpts): I. Mazurka-Choro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d8e809d150b9155af529cb5a3346a5ab339ce7cf4b36b4c1727859989bf778. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKI191944310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906d04d1856222f524429c4c03231f7af8772449e22b020e263ee5b27440876. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI191944312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5dcf4a745f39e7cfa2bf95d5b3d7e43f79c1fecdfed04fea570a6dc052ef55. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HKI191944313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c357e3488b47e2b478c19e503e4ec54dc2e0c723b0841dfa09d1c21243c4a36. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HKI191944317.
Villa-Lobos: 12 Etudes, W235: No. 9 in F-Sharp Minor, Très peu animé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5ac42705c20a11784659c7aa43809887784cb9dc3d7d63722516876e6af9e1. 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/FROV62412004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb47851a8487953aa9393f097ceaf22fd334f129829c525c84bee7abaa2c44. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FROV62412006.
12 Etudes, W235: No. 2 in A Major, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a8d1de8fd2fafca6cabde7e0d6c27ab8cd51585af2af254bb1fae03647088e. 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/FROV62412010.
12 Etudes, W235: No. 4 in G Major, Un peu modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dbd5b883d7052a8d0b9cee16d7cbd15f62a77abdb3268cfa01cc8585c35f34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FROV62412012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478dcaed40a0d012fe1d3fd3f2ab65ad0311a5b85407e7f39aee25ca68d66925. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FROV62412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592c12082a7884938fc40cb9a0c55552a04a076f2b9e5a557842165d70e1aa2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FROV62412003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7a31d17ace4e2dea407a742a43d63a015021d1441270b9224fd2abbb6f9e1. 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/FROV62412008.
12 Etudes, W235: No. 3 in D Major, Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813da956409d06490dfdda7b15c88a8da4745c3e19f140a054b287248cc2704. 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/FROV62412011.