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 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 0x7cbbb170ac1e8be87632f1f366ea2059c94f0a7735d862c354064241c8023afd. 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/ed04cd5b-640f-41a7-a8e7-53a47dbb388e.json and https://artists.proofprofile.net/proofs/artist/ed04cd5b-640f-41a7-a8e7-53a47dbb388e.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 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 0x7cf851d61397c48d74be64f6c900d4b43c630bafa4adea3a161c63a1690c8605. 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/QZGXC2300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e53d8884b76f9a7de5b68e6b238ccc7f8a00991cec8242fb8b45efc58a6b7c. 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/QZGXC2300758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41576a4a3a6c6dda0c1d2f9bdef71803a2ccfbb4c2e41c447e594d4ce57046ce. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USDHM2019122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903a770061e877018a433013048f235914c4d2b1aeef1646381713943e0a9d1f. 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/QZGXC2000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb1a583192f7329e2c29e545d8715bb26c24f85ebe631a3423d66c8d9f94376. 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/QZGXC2000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e53d8884b76f9a7de5b68e6b238ccc7f8a00991cec8242fb8b45efc58a6b7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGXC2300758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf851d61397c48d74be64f6c900d4b43c630bafa4adea3a161c63a1690c8605. 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/QZGXC2300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319aaf487ad15396714ddf24357baca74d2ee6dc10f1e28def92fecd0e34832c. 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/QZGXC2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab86eeef720943db01f60761da0e87e580cafe0c29e9c23725a466a0af58ce1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZGXC2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1913668e2dd709de292261b8e230a7cc212fcf54b837b7f0a574857b35620f57. 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/QZGXC2400356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024955efa3ef7896ed6b0654f6f6dee9d92dcd25cc48244d56fa51d018664c60. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZGXC2200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2046c52514ca3dcf1190520f1eaeee9415c961632828db69ba558efbc30bc48. 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/QZGXC2200132.
Declaring Glory (The Earth Sings its Refrain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd55e9f0159c86d155441a945daff87860b2a7e8c20f106fea7397561eaffe. 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/QZGXC2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603857e53e458324c5dbb74ee21cec0f04a3cdcd6e9cec23256d600071b827d7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZGXC2200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92839e8ca8ead2a83b281dd602afe6c3454abd3065e77eccf024b43a8a2859ed. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZGXC2200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd470cd36d3d5fb7b93292023850ac5b762d09661e46311ecf7797f761cf7f90. 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/QZGXC2300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebc02900019c71b9325245be9d4f591aa498cab7f92c669e2eeeea5b26c3a23. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZGXC2301139.