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 0xb153875e2c351ba93d6ddb00ee3f26d06810b10db1bd7e381a05fbaf7e97fa4f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/273f0e9a-0eb0-4eae-b63a-c92fcbe538c5.json and https://artists.proofprofile.net/proofs/artist/273f0e9a-0eb0-4eae-b63a-c92fcbe538c5.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 0x688728e6dfda8b19eec2b971e0a1771102dfc36f0708aa4af53dab837ac6929d. 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/ES71G2030441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a1aec84bda0004ebcb1d75b232ac1be7cb76f2c4393d2ab56e7251ab31788. 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/QZHZ51959065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a1aec84bda0004ebcb1d75b232ac1be7cb76f2c4393d2ab56e7251ab31788. 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/QZHZ51959065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff995b6f22d4bec8f9f603f1e807eb5aa965df0b55ee3d954de9eabce9f66282. 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/TCADA1790445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688728e6dfda8b19eec2b971e0a1771102dfc36f0708aa4af53dab837ac6929d. 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/ES71G2030441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbf8d86f9a637eebfb4828e126d9ef2446d31e9cebd2d20135762d8977d5d3f. 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/TCADR1859553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409b41a1647de1da5384a799a0b44e19f8879d9c6628118ea96b2beda79d1ccf. 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/QZHZ51951425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5162018d5ec2cdde61a49f9ca4ad757f78963c2741cfbc2ec9814021dcce2f. 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/TCAGU2315457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272bbfda9e2ff423b4c01fa740fdcb724f7323898090de674a4944b778b8e430. 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/TCAFG2017278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cef1ffec3a16471eded0ecb82893ae865541baa61da5e1063bfcd0176a7b1a. 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/ES71G1508090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9666e26cc88ac71113cc40ad0b915826733be609421103c412f8ccdb9665f18. 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/ES71G1508091.
TERRITORIO: APACHE VOL.2 - CHAMPION SOUND
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eb675f32c6fa108709ca034a410413b8aa64837e3712d961cd24b99f9c69b6. 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/QZW9K2467848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688728e6dfda8b19eec2b971e0a1771102dfc36f0708aa4af53dab837ac6929d. 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/ES71G2030441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70714eff3e0013f117bffb5e5ca0a97cf1c858dabfce2ca03d4a08a50f0cb4a3. 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/ART0G1201668.