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 0x6bacc610f27e04e5097784787e55f333fe8bbb712785c86b6c75816d21bdc35e. 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/9701f8e9-c09b-42c6-8b6c-e4b62171e0bf.json and https://artists.proofprofile.net/proofs/artist/9701f8e9-c09b-42c6-8b6c-e4b62171e0bf.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 0xff27536e2e828132c3eea8e6715132b4ee5e135dc0ecfb07420445d372a934a7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH1213533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cd367aa98e036ba21712d369421475970c744ec00845db7f5a69f916839f71. 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/TCACL1614469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b90552b0d1f6bc941e8a7fd9abded75587caf4dbcb535450d4de5e12b874bb. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCACL1614472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8887e1f92804d7dae416e4d73faeb6567bd90ea935117bbb39f1665b17a8a83. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCACL1614473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79ee612f1ffae00af726a5ff82bf92ad1db21eb33f1c4aee3a909f55c621122. 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/USV9E1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc01c03888379c38752d6717d14428edba21bd800b7c25d8d1323c8e0c6b650. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USV9E1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd11f5576d6c247f3450a07df55e626076184f3cfca8da6abc5d19e91c8fd209. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USV9E1600032.
Pressing Strings (Live & Unplugged At Red Bridge Studios)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d9009f2492312c5d48d25291ae26c1f08577d9528b1420c2648c0b73b24136. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES72098822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68759dfd5f8960e33023e1ef2a44e5305fb8ec72dd47446510398517a404537. 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/USHM91823840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b2fe5e7c243b738ed9d58cb7f413fb5f499cdafc51b70c680b228dc16108f0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES72098826.
Standing Outside a Broken Phone Booth With Money in My Hand
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99c3b7a82a24a1778d371aaa3c7e6859884d9d5901fb8651be02230b6c2a2f5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAFJ2135485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fda9029fb2a4474f4d889e5896670e94f5fbacd730636b81186eff2d21c0c47. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QM6N22341388.
Lose Your Blues (Merry Christmas to you)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe419510878c8ab5af76604c7ab28e535a21588f096ece7e5a0e8198f100ec6e1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAIO2409139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210bd2c4784d95978cd40444b8bdbaf686d67354dff5fe78879712dbd126458. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIP2409650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27284e3c0ce3773442d51056817aa873d6d6bcfaa820ec69f223b3e0fe70cacd. 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/TCAIO2409740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5472cb35f4df077b62f9da006cc5f52f49229296e4ea13763e9958834352709. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TCAIO2409789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d878255874fdacba08a90d331b926bca7a6901f6d087b084ce054c6d9e69cf. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAJD2449833.