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 0x478f255332ea31636f37611bd39dd4cb22674a1589ac997b6bf662add0b73637. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/054b4cfc-18ad-455a-a956-7f4c19003c21.json and https://artists.proofprofile.net/proofs/artist/054b4cfc-18ad-455a-a956-7f4c19003c21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Angola, Soundtrack 2: Hypnosis, Distortions & Other Sonic Innovations 1969-1978 (Analog Africa No. 15)
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 0x47b60aa9b326fc2acc05716f9c50b03989a1c153230687dae4a846b9f1062353. 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/DENR91375001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b2400b75145b59353e2cba47e56a8383d23c715aed012fd7136c296b085c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DENR91375002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb3be4685c66693dd1b17929830e6dc9756585c937f2b4b32c40ddceffcc325. 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/DENR91375003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1ba0e8d7d7cac0388209da58b56ed21b267ca466614e873154812fa9c84a0c. 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/DENR91375004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87854460f5741547c62bae5123caec04c0081a235e2a9967bc146ddb41ed182b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DENR91375005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479d2b9b8d0d392837c3371d3490f9b10add02237531149f23966cab72cc4bb. 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/DENR91375006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc867092d6845e6a4046dea2141c7aeaa83e638e8c4edba2f319e9a8cb28d0736. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DENR91375007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69227d2c5edb297e46a1fd9d178a25cc8b4a0ff3caae942ac01617bf51d9eee2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DENR91375009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619ddbb753248ccedcefb3eb5513954188fe9ea30b39a45e2051388d5ffe352f. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/DENR91375010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9051b708e0944d0dfb5ae4ef7a629f74f323f5a35910f2c6c89333f25f9293fc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DENR91375011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f301bea46965e49559ccb3306f619f73cd17e85987b44b87fdc9ed10c7b138. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DENR91375012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc0054dc7a734bbbbb372cd942563c1b8bfc6d49b47453a216685c02b824899. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DENR91375013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cef3a6ff858f6be52a6e26003ef7a0b5101e1f77d277bf1d21c1adcf1359f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DENR91375014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2e59b02fcdd84acc5ae40f49c4d9deac1a0390e175ac253eb428cc0b53c034. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DENR91375015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc960329ceeb92551885ca1e6fb8846184a20dc0bc0a67e2e884a8d671ecc727e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DENR91375016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e62cffa849bfb4a435220d3426eaf26fd3e7cb540b285b5ee3c6d69d29b842. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DENR91375017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd700fdfc0d61457ce410403d829edaace092920d342d65b19d2ce551a8a226. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DENR91375018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541c3a82de02083cd10baf4074d4e62fbed916e81f451ad8ac5c88452ad621fd. 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/DENR91375019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f4a76161e377f77a5b64eb3063be9727f116f12587b9bcaa1419cbce95dde. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DENR91375020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e620c53f7bcb85f31712ae49b1e1f9d64921c80dc9d94598e520982e21b8d0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DENR91375021.