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 0x861f9ac05885d0030ea3cdcfec8a308dd792e52a35fe47c3b321116eb94fb28b. 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/0aafed29-a416-40df-8414-a963079ddaba.json and https://artists.proofprofile.net/proofs/artist/0aafed29-a416-40df-8414-a963079ddaba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I've Been Working On The Railroad/Folsom Prison Blues
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 0xe63bd49bf10d8790e100eed486e6b5d528dabf368478af89557762f6333cf245. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0718253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c264e040fc4c02c435a9c8b29c8c967a53d5118b2b421676e105c40fcc6ead. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USCGH0718255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fa3f7a98e542b9d182155961b2e2895f00776e4066d2d2be26a734e1ed1175. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH0718256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f8341040b860af5a188f3543b8ebda999f6680343ab31120f23beaeeffab2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USCGH0718258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c335bea873e3fc849171238f1feffefe6a8ba0feda88049a9be7e96ef40c5c9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USCGH0718264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeaf7d6d8b876cf96ccbb86d1f0a48d3d5e7fd9b2f0e5ede93b82cd765b212f. 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/USCGH0718265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c92b275dcc47eecc7a56d361399f4cee78979b86e5498f2003003ae10f7826. 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/USCGH0718757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274574a3bdbb816a56fef3bb5e20a49bfce8315e74e293c80d8cf0766a75856. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USCGH0718760.
Down To The River To Pray/Swing Low, Sweet Chariot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc573f8fad35df327bfee9e9757431053257b95b4235a2ccc575aac0e659f2e7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USCGH0718762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3d8e40e9706aa8a5c818e74bc35bb59671d6fbc86b01a151ecb314676825a8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0718763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd43f9e07d70e32f94080ed98e4643958548a5cefd72ba278cc48525797486. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/USCGH0718771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb31c7879b739ae5d290f4e735faafa57f79a330a8b896e963c9262f0b34f8d0. 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/USCGH0718773.