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 0x531eabaff669e596cb6fb6dea99c0f036631f0ed615b0c60928618d6d40e26bf. 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/df0b2b57-2fbc-4f19-bfa6-d4404d2c3201.json and https://artists.proofprofile.net/proofs/artist/df0b2b57-2fbc-4f19-bfa6-d4404d2c3201.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 0x17a5e8cfa8c0587dca75f9721e5c5147376b7d7d6bf949eb8107606e1f2df97d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USDY42494081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9cb599b9256a6511d4c7f40e5da571b74ae558a2c796d6659fe396a9173ff6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USDY42494083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f7ceec80e09ec4abb0de0c0c0a4faade9fb4af3e1aa4a1a61da790b216390. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USDY42494084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2d99b25abc582f2437375d9ce23d735dbd354aa70de6c54387e1327e2bc3c1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USDY42494086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2626ed70d85c4cd21525edd72b81a4c793b83d57009290d4e2e3fae18ee3b381. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USDY42494088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11113ce7da058d1616b3b322aac938a360b5f37110a66598fc3559451dd80e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USDY42494089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb2751cda875a5f0fc670217ec79cf2dc09dd8edf688ccddbfb28ab993d379. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY42494090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2be54175af86a422fc881918472d84d13d561187aa5e22112b1e06e9dd7aa0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42494091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b5105ae4835ec74df93c754cf15822453382e0b1028c08b8ded3abc5ecaa06. 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/USDY42494092.
Rain and White Noise For Study (Loopable)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf255c415bc78eefb205e14e0ea26cce0ace6a75623b3b1a2e3ffb61b71dd1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USDY42494093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06dd390ebd9ea145458319d8a1096fefdc117ddda1f86037bcf20890e94b3af. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDY42494095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f7598580980a357427cc02e7c098fb3d9b773910408543f5ed2c7897507f4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USDY42494100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe54078224cbafbafa0effea030aa76fdbf76b53d07539047773b458dd034b1. 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/USDY42494101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59892a2ae5f248301666b749ec424f3ba43d5dacf167d2575f241960896b147b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USDY42494103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d74c1cb87cc3b7b76649231626867db24a2e70325df58662655244ea9cd9b4f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USDY42494108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24921ee38bb640e0ed67efa2138b89bb9baa2261db309c673da39d0b8244430. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY42494113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d758ab877a749ce8829d3b3921ef00e71a15cb83465da1ec860f6ca824ac687. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY42494118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc859517371c2c7437de8091475d9a04e9bbde7f3ad850cbcc133374feede07dd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY42494119.