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 0x7ba8c41d9f941a4dd55e70c37ccc0a697852cd594c9d3b2c9842bd7d6d2818d9. 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/ae96bbf8-7c89-4b29-812d-06fea3f2d4f3.json and https://artists.proofprofile.net/proofs/artist/ae96bbf8-7c89-4b29-812d-06fea3f2d4f3.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 0x158bd52b31b380d1822d19bffab11b1ffc41f480cfcae8032b071595fc7aaf44. 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/QZFYX2104150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85e39e115d8f65d013ccf1edda4bce143c6cdd0935be8cf0c24563f91fd3090. 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/FRX452138324.
Perspective - 2021 Extended Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a20c7ee2c7ba118d68832db23280b2aefebf825db43ecd22927dc14b5d0d5e4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX452138325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9b5c95b1a4c99aaa9c8b376a3af9da3f9cf8a58e9b9c170246160ba8cf734f. 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/QZHNA2033602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981979e89dc5c72aae66f771aacf6f9baec927646bb772a579852517cabbe28e. 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/QZHNA2033603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed3c5a972594378ec3215605eee029b0ff8dd7476da0b83689dd3071f61371. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRX452164987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47fec90d89f60348f09fdfa7b963bcdb7649285d011ed1b34ea44f1dbbbe5df. 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/FRX452167292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085db0d77c64f3839d471add98c0ca5d0463abfcc21004ce40359b3c309700f6. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHNA2033598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55226490e7c2101b8cb48436fd727d8b9338a0c4d73334f6959afc8ecb6d7663. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFYX2104147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eb580a2f450a9136d07a6d33dc6443334d9af81aebfb7d0bb0434807a1cf62. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRS182117234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5871b11cdefbf8f872f531f91c42ac3cee7cbd696c8445fb65075f4fafd93d. 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/FRS182126757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d3351ed564736781c80dbb3e09889085315e27bb4475ea9394fc0cd836b6fd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRS182126760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33915bcb4ab4ea5cdc4601a3ff832fb7bcc48461cfebe881d8a621b3d68db01. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR10S2211800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed43e6ba41c84c399020d8ae032053665e06b5df5153e1dcaffb427219b6369. 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/FR2X42201117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7034157d27871181d39fb2cb46ae28267e0aec6ec5b51636f700ee970ca245d. 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/FR2X42201119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222d37086b4ad62db13a46175242f50413c66f5ca0fdec51348e7458041ada53. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/FR2X42201122.
Somebody To Love - Extended Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e7fc21b2a95b9a3d6589cbe792c7db71d62fa3a5ccba5a7a4d0f9ee6c809d. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/FR2X42260315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68436198bec196ef8943012dd6198812f1f5b3fd2cf1a78d291dc81a820f319d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRX452291888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4f8729e691a4bcf1a83861b9324e13ebe16ad9e8826c28988aa027a7febfae. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/FRX452291892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a6710fc2c6d4eaf6d66b71d1ad55fc767d1f36ea847cbde1e26d4c1aa7f0e. 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/DGA062200545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bba044893cf3bc60e0e6e4aa81a01019034529a6e2da17bcea552e0f91088b. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/DGA082227595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12375baea2f29a39e2c9905c59cbfeda7854e22bfda0c0b708f01ba35476fc22. 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/DGA082227596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c849c83cb2d9fd58314a3900d3b9250aed9d0fdb8160c7b7762d0612a6187f. 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/FRX202348175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c05074d89322acd07837415ac4f27debb16ce88d1c5d4f2faec9e235e02d6c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRX202348182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5282490269dc2abb400ff57358684822fcb25e1b67850c0aab09e169291be5ae. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/FRX202348189.