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 0x77ab68d1f60c253b1c44e15a51f038203bf7988594d9f55da05640b319eeec8c. 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/5967ffd4-09e5-4743-b9c1-b546d52a49c3.json and https://artists.proofprofile.net/proofs/artist/5967ffd4-09e5-4743-b9c1-b546d52a49c3.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 0x1bf637c3b144870a85c5c955a2249f3a93d6680dddf83efacd018aca06627848. 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/USHM21424947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20e86f0dd519e948b939b71a71f00bd22d191bc29f15f8fbd3ca205b0a32cd2. 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/USHM21424948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b784a11d4211214aba4d2791af1b5a8ed6542c32dbaa39982729e45537ffbe. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:37:13Z), 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/USHM21424949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac2e3fddda84ec44d00267b957e5ac1eaf6ecd99decaf65cdf924a278615062. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM21424950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c0303f1ef1af2d16da87bcb60eebafbb2b1e6e5dd40d6b49592b61ae6f515. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:23Z), 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/USHM21424952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94423397d6864d73fb0eaf8e7f800d5a2b5b96d5b37ac0cbc354806a72373a28. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADF1781741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750dda686c9bfa986e29e1a0d6ee212be94a5424b0532cf75e912edc1a11110. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADF1781745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8d7f200e50459ca86ef171d5aef84075f3acc77f7b5dd3ad7d17f16aa62fd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCADF1781754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95f82cc05cb5d1124f97d1924d6bdd9e2f92a2a36bf5174f7475726b7c9a083. 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/TCADF1781760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba35c5687ac03224e24b8cde0209f9930ad3b6abb59874bd56047fec6e04929. 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/TCADF1781763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eefadd2204e45f8feb41670d532f18504fa3e5b8b6587780773b883dd4d3da. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCADF1781766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ebdd3789e21d70702078deeca9f4dd4f502e14647510508ddaf7a330abef7c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:46Z), 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/TCADF1781768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e85bd974cca12c0a4bc913b52badb27ad5d1342378d67180945b56a45538cd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCADF1781770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87c4e1e93a5553d34890819a6e6c4de273e4e0d15515856383ffb8aea2a0c92. 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/USDY42112148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5ce2fc6a55ff4974a4a326ec36b49672e9d82c974650b33d360793448e3797. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM22131171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e92dbf4b2da05d22f541ad4009383acbd834c0f1fbc95dc9e509bab2eba8e3d. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USHM22131172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d5b8c8a4855c8214382d5ed0abb9572aea6720c725f58b517eb13cd508d9a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:56Z), 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/USHM22131174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd808fcd674521cd1963d5c9458de8444cbe5c76e601d50e9a6b902ffcb2f9754. 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/USHM22131175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd551af7914fb2388ba7e7d9c85385fdd5a5cb900b1c0fd019651660892118fc2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USHM22131176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54fb5aae278420e96cdea0087053d8d63669e1061362946bfae6b0b266c6bdf. 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/USHM22131177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e85b041d80e6d42ef233abc46d92b475a6fd8e18f93690793026770ab08cfe. 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/USHM22131178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140b95a101291676975c06728aa1b6bf82effa2e1ac8e49f01efee54e31a71f. 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/USHM22131179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2774d352b64cb6d0e4886b536c971ec8b5cc9b89ce814cdb25da2b14905f4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4R2382545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd447f6207ba09a025baee48406b64edd1db1ce27b5b7ec75f87b57aab82812. 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/USL4R2382546.
I Never Went To College (And Neither Did You)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf194669209a55866ad81fe7eb4484d25ab22baad6fb111326d90c4eaa9d61d1a. 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/TCACO1659102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93360e20c57d0eb1a73b64ddddf8ca119b704bc28ead51a27345256e80eaad1e. 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/TCACO1659103.