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 0x0024ba7b8ed5a4b192a324d2914aa574e4ce534419d7ebc0b0a78d484273d1ee. 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/672953a7-a5a7-45ec-802a-e436a7188adb.json and https://artists.proofprofile.net/proofs/artist/672953a7-a5a7-45ec-802a-e436a7188adb.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 0x9f07e7628028fb505ee4c6c48ced23cfd2733e5e9a68c32564ea3cf1e9ea97fe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ051800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec14b396b3a00fbdbd3e4ce60126669c54d61ec5f3957180611c4ca9b1c6def. 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/FRZ051800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cf4be78382ec6128c4b2dea77bb6be5a47aa5d9a2629952aebc99278c29c5c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ051800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260a51aedd320848c262fb4c6953636a886c88f800dde51c797eaabd141ac91d. 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/FRZ051800293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef712c04fa22e19884bee1b014d02b6d610ba3fbef7d944045e3581c5438c3ad. 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/FRZ051800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9087a50f6e1640a9ee0ca37d787b42cd39c1c77a8fcacee55db1af7489f91a4a. 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/FRZ051800295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41044617b457f16429cd2b4f0e06fca43516d82cfb6a8611fb7c37d90e09a26c. 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/FRZ051800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d25180b98c11b77ff7f4a6993aded0229e9140750666c52909d65cb9f77c2. 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/FRZ051800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52450c08ef632d017e0ee00b7bf17be54c57b5c315df1707f2755fc63e039a77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ051800298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557b79dbe8b4cb37ab654e4392e3abf2e0304404df4213e85b914397277f88fa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ051800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b4994ab3c5c28b9b9bad9349f7b1c8113bd3e09281233e81ab2d349280d7d. 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/FRZ051800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3efa9e1e939195aa1191bee9887387430e7912ccad21749e1cf44a96b8f5fc4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ051800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1174503ee59f5fe772230e238f8b33dfe434b8c402542915fa3fd36790020e6f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRU622260401.
Bachianas Brasileiras: No. 5, Aria for Cello and Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58238e2082ac3a5ef784549c534aabe84fd6b68b6570737ce3c924d5bf8f3e47. 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/FRU622260403.
Sicilienne (Transcribed for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e87b13805122962a31399133e3bfa11a3ab1f05443dfee5a502d03e00447a9. 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/FRU622260406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cd3552549afa16e8ebeadc74a5d27894cff5c25cb304b420d6a3e722b0cf8f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRU622260407.
Les Folies d'Espagne (Transcribed for Cello & Harpsichord)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bcd823167bffe1fe0fdfbfa43f21f95cedd44fa32b59b293a96e94acdab680. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRU622260408.
Détail pour violoncelle baroque et clavecin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca4df28dc88c7c08701397a02c957cc98a93f447c47a7f932fc9fc555ee02e. 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/FRU622260410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3d214a93c1bbbf0b416eaf873a1552c25a1acc93718f28ca7975821b9734b. 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/FRU622260411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef712c04fa22e19884bee1b014d02b6d610ba3fbef7d944045e3581c5438c3ad. 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/FRZ051800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337c5ea67a010495e82ff5cee07d3f65ab94921498b0d1c9f8543a93b25a789a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ051400339.