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 0xc25a207cbe6b20372d99af79149e9a504422f33df8676f395729e44cceb7a1b2. 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/339d0b98-ad96-4d2d-ad39-cc7dd023e829.json and https://artists.proofprofile.net/proofs/artist/339d0b98-ad96-4d2d-ad39-cc7dd023e829.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 0x77afbf6914a0724438917d709ac9a3d6703ccf58709a03c61d9de8126c66d534. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US3DF2403798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee00f34398ed392358a4c1505dbc09b8ac64a58c25cc7b12753a8f8a369c433. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3DF2403891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c5fc3055c286eccb38ff32fbbecfeed174f062a6b0271e55dfa04a1e319d6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US3DF2435093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddfb5d31165de22d905f83288965290f7386820829a9d81bc874546b26e0f2e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US3DF2435094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cabac943c9ed59d6b2cc478a35be3a546a3c26e348306b89be08a3981f60b7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2435095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf9ea30a1b31d13baf71e7087d2816453ab0fc224936ae11ef30eb374b3774d. 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/US3DF2435096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbaaa96b15d2de46f4ec621c30f0c1e7f906799c38ecc4452ae78984834785e. 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/US3DF2435098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e95baedf01c1472860b6936cf28647edb4bca7016bdceb92e22b73c658ee85. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US3DF2435099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509d4a52ab31c9e08a54f5da0e57b98beff0c83b9b84178e93f2cb23c0f3dac. 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/US3DF2435100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51409e4242fcf55807f09563346ec62be280b02316e2755115c423b9ed8d91a3. 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/US3DF2471060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754c810c4555717840bff16e521a66aa9e56df319bd1783aa95e28fafe328f16. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US3DF2471062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582da4fa51856cad4c5af9443dc2734d949c7dc0be371aa2242c7461b7eaccb9. 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/US3DF2471064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d849f92f17ebd6aa7036d778d2545c330f0e64dfa0844904145136ec2706c22. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2471065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd55d4a8edeaedb3a8077e01190be507cec884065adbc62fd9c12a90512350b3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2471067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5011eef9217e1365f787768f231e99d3f52bf1fdec8694bb2858214c7356cbd2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US3DF2473877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afaf2c60ab869a5c66a475d69f00cb27a193d52a13dec5181872d75720c84ec. 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/US3DF2473878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ad130c4caa86d19b4449804ae2f18eab3db9036709ac51c68095818233b1b3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US3DF2473879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97967298d0e34ed952f9dd8db6c8c9232b254a74c70300d8f745e7220661895. 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/US3DF2473881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb22231facad3e417d1f9c8abf18169b9f0263377c711619582a9b15ae22c6e7. 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/US3DF2473882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f040690cebe341bce2678b47a022d22038357139daa6952f7420f5588f87363. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2473883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ede3ffffc000cfe7a357e04392e89a0116c21a97e10f8c9af392cbb6ad3dd. 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/USANG2473540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc907c04f6dc190ba266767ec9c9bb5d17c08ca87b599519dc12c5e4680c4c864. 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/USANG2478078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5336b06c7204cf3193e66b978966a3ee400a884e6a954104bb283d8baee103. 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/USANG2478079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d351ccf20fb463daa5a894049a694fac32ddaef29140b6c9f6ee1ebac6fa9df. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USANG2478080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58510f90dcda89c1e6a2709edc3f36e4e3fc52e492a8f794d4fa9d62acacbf6. 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/USANG2478081.
saving the mistletoe for someone special
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f81abea6add1af92f718e278cded4543453246646a4c1840075d30597c038a. 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/USANG2478083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf92df9b1e724e7f50a7f8f69fef7471788410c1504f931f56a538fbcbc19af. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USANG2478087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580ffeab5b8bdcfb1615726fe4027d08db3bf6f8db60cdb8c92be54b8eead2be. 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/US3DF2505145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69518cb12955cf839dc8fd6dd36c31c164cca41dde0244cb47b591c8a82fc83. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/US3DF2505123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdd09a5fc4fb854292ffe04fb8d692653605a56d30cdd62aa86aabbeaae696e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/US3DF2505124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb593d0de978e1b0a1749a319ca83fa9d5d9092b0432700b6eff5f5ce49ca353. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3DF2505125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6929d5b94c15d484576af661b3c2fb31f3680c7bc2454d817689c00b3a9ae8ba. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/US3DF2505126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c061cca9138933ad59537f7e47a1d1bc67401725fd05452ee5e215885c2a152. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US3DF2505127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e8706a82e6d6dac716c6e038180aa46c2f67a1262965e2a22fae5c2c49fd6f. 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/US3DF2505128.