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 0x17f151125296c889705a02882574e8c1bf32252c24f7ee491d89ba34ac29d8f9. 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/d53fadef-a4b6-41c1-bac3-33d6656d583b.json and https://artists.proofprofile.net/proofs/artist/d53fadef-a4b6-41c1-bac3-33d6656d583b.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 0x59604eb499a1d48f4f5d0011580a8d9f8d926ea368baf12abad49b6ca43de4e7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DKAZ71708602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2e3a190911e2b54681d37324b900cbfa47e5c4ee729866300cbd2a2b5979b0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DKAZ71940601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4beb4332b45ae1d2ec9d6412397d7fa6f75f523927247413e1ea66f185f48d4. 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/DKAZ71940602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d40ca094a3a80256da854dec444f4e7a35dadff2259fe17bad77eda694da55. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DKAZ71723504.
Presents Sha Plays Getz & Pessoa Sings Gilberto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1dee622ddeda2b5ef66f67992f7d200154ab7a3f8cdf066cb76ac5cbd6804e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DKAZ72531603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc279509ce1153c89c0371ad7b2432416a4c890d3653bdcc6fe63406b3181293f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DKAZ72531604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a64983e910a1af12f924d84e1887f9e2e58d0b6d895f84cb5577cfae94d16dc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DKAZ72531607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86375d852f2638ca6fb4fbe95df146e4d0d930d9165f28ffa5e2c5ffa3d04ba. 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/DKAZ71921509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9709e2e807c12186ae8ddb5e2be89775b1fe0a2b11fde74fc2cf1dd83b48af. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DKAZ72328011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186518d3a8ae2804f4282501fd9d53afaacd8272105ec84f38ccbeec75973938. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DKAZ72327910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2e3a190911e2b54681d37324b900cbfa47e5c4ee729866300cbd2a2b5979b0. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DKAZ71940601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea9a06914214a0147b640db3089f955bdc4ba4a44b7c98d86484d2da4c9b8b. 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/DKAZ72331601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7e4c219308760804771e9d734b932e1cd507d55a97f2a7549115eb6e11d43. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKAZ72218801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a277bd94e863573cde48ab0903f954582b976c5e6eb7e858c5eea42608b78b2. 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/DKAZ72218804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cb2e885da32191168517b2a848c3ef4e262b945d90b08c0c0740dc09878f8e. 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/DKAZ72040603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59604eb499a1d48f4f5d0011580a8d9f8d926ea368baf12abad49b6ca43de4e7. 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/DKAZ71708602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83771623d5959432a9f862f3b64c1d25a3a057122673e8075d710480feba113f. 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/DKAZ72229601.