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 0x2fc6d1974cd9ff8011b89b3506012947cde96758eb88b1bfea058731d2031f54. 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/e65cac9c-3eaa-4592-9541-7cd7a2729ac0.json and https://artists.proofprofile.net/proofs/artist/e65cac9c-3eaa-4592-9541-7cd7a2729ac0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oboe Sonata in D Major, Op. 166: I. Andantino
Saint-Saens, C.: Oboe Sonata in D Major / Poulenc, F.: Oboe Sonata / Britten, B.: 6 Metamorphoses After Ovid / Schumann, R.: 3 Romanzen
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 0x0ad5dfa933b94c7048350e1a95436488189f0145da8bf02f54dfdbc99abae485. 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/USASX0623501.
Oboe Sonata in D Major, Op. 166: II. Ad libitum - Allegretto - Ad libitum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9196a7dce5ed4e100fd184db975b5687a61791463db9bf98a6aa3970c01b9da9. 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/USASX0623502.
Oboe Sonata, FP 185: I. Elegie: Paisiblement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3587f3d847587f17bbe892a9099fd3f2bcac85f2ba34ad877a28440033299e90. 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/USASX0623504.
Oboe Sonata, FP 185: III. Deploration: Tres calme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb3800e60f7aa043eedcaa80e3c906aa59176701dd7d6d1395d1ad2e455af19. 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/USASX0623506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec91f88469041958ccbb9a1d56b750dc2d454905a2887c19a6c204f118ca965. 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/USASX0623513.
3 Romanzen, Op. 94: III. Finale: Nicht schnell with retardandi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4019a89a7bb48d41ada42a84b77966d0ae8c6029275c43678b077b298df523a. 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/USASX0623515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd45792b0e43d7523104b399766898da13d9fd9427b3396a06f0863e9211949. 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/USGDZ0601002.
Oboe Sonata in D Major, Op. 166: III. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc60e0262de7611acfea2703f90827d3fb6f929e05a4b3854d8bfd38f8e29db. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USASX0623503.
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
Oboe Sonata, FP 185: II. Scherzo: Tres anime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b3552c1130d767c0bb9c7122e6d92ec1ce79a3f1b11c70b32ef0894b2a3ba. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USASX0623505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bfcd8fd7a5045d4f49d7e276c1cf466e0f1f3f000fcf633168ca2ebb58c984. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USASX0623514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b48c143043a1549c9cf7a0bcea705f648b881a916ae55e24713eb3d2e45a66. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USASX0623519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301acdb64d14882898ec2e05aa75105c2cc80ca7c9b9eefbbc556c476d750f42. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USGDZ0601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ccbb6825c039dc9cc237c3c40dd25799f1f036eb32180d3b511768499f6847. 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/USGDZ0601003.