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 0x758dff3f6f56669bda278b753592d0c639c49fbf8294009bf11c1b1dd60a013c. 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/f9383f86-ebdb-4db3-8e8a-803e13d4bbb1.json and https://artists.proofprofile.net/proofs/artist/f9383f86-ebdb-4db3-8e8a-803e13d4bbb1.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 0x492549106b31306ac9f28c34f1170e193675a4620909f27980210b88b370d69f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRVSN0300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6763bb1bfce3440693d15d2e584ca5bef6ab0e39149e3db3fd2090a5ca895cf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USJER1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c5ff91163456127a4bd40ac4398185dfa900a6b85529d4ea1d87fc0eca41b8. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USJER1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda843f0dd8f0ac40d714d5d3323d22628bba7eee50bc9fc62f74edf9c9fddfd. 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/USJER1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8dfd572a7139be68400954992694a1689967d4a0c3444fa0955511616fc47. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USJER1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c6fe007aeda703cc18a1ad6bae9c57cb23cf7e8d5bf16bc7d6c79351887b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USJER1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6f2581b22d1277cdaf8b93392b4c3f8fcc243321d75fecba49b401cfd3364e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USJER1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59cc779c6c1a6ed26c3c319ba143973978d128416b7a95770b9b3bccd43f1c. 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/USJER1100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf244485c4db60b126fa3ff7c987f908ecddb719d05f3ffa2922911988a6db8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US4W40610167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c595c398f5931b0590ebba6abd1c776da3a0f9020d0bddaee2e4e360697229. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJ2P0800435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019fba799b554edd7137c084807a192b15af8051a2316e264964f08989b5639. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USJ2P0800437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d7c28b91cf9a447a394cd84e3a641f3b092f6c3081a57fbd59d90c364cca7b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USJ2P0800440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3a764f39988e18688420731cf9f2daec1e8a8ec4bf7758dfa9280b19cfcef9. 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/BX1CS2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1994119e356b461b47e93803c40d253bff1f80963ae558a8ba14112be2ea9b33. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRSL50300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00b104348a12cbc2a3960cce11d73cfd60bf0e5785def72f051c0fd53b8f49c. 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/USWH19501124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd7e0451952a82ae7b1ee13ed4cac1d2f0bf88cbbfaa6ec8ba021aee320a45. 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/BRU0C1700014.
Christmas in Rhythm & Bossa - Franco & Guests
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaea289963e4397a8309a9d3bb2bfbac5add41f0bcfc2e6a3b154797bc976d9. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA370699531.