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 0x15df95e63105cd769dd37f5e5acb06b0bfcb4b2625153b5b7a9dd09d555254e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63c6f6f0-77fd-44be-b83b-6d0418e74889.json and https://artists.proofprofile.net/proofs/artist/63c6f6f0-77fd-44be-b83b-6d0418e74889.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 0xc44f7fe1842f222dec491410666f533eb74e53e33aae575ef06652541293c03d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR43D1803068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae200ac819e15571e6b5e3d6b4f87b1e6c8b0ca604df8022c54f5d7fc27cd9fb. 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/FR43D1803069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ad6a2f6506486891cc76ef49bb8a488488a6238c8c98cc1d8f35ba88c46fd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR43D1803072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7efd7d628f3993684674d8afe9af7595c34f33901c1d8968c905ca1afb3ab3. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/FRX452383264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1562523f6ad3e2e4a413973bce4d8d9e2d265891a6e7b9a43dc33d162968528b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRX452383267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aeb74d691915c4ccee059149378b83cf8c9502eeeb7567f5d60c922a6c15f4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FRX872581100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132e8fb022371ffd3bffeeb8646814ed33a8868cf3383b77ef0563849c114b7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FRX872581101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb572bdf5acfa7683a54865bd485ee29e822405f263c4775efcbccbf98c57cfc3. 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/FRX872581102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9ece016dc1d8ba48c56d140d7ea13ad6e04b7516b5345a4d8e109cb51b82df. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/FRX872581103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce9730154c767ce1a341fbd5fed7e4649bbdbbe321923ef4a10eed83ad598f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FRX872581104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ccfce0a97e194d00406749f0ff2d0695d421c062d9c409e4810f86567e67f. 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/FRX872581105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2928fc90c6471d15fe0a43691b9df053cee75dd42b8a2aea44a20f09e60bd31b. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QMFME2463772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae54ba118bdfdd1e41d48954d0d29881c1fd127e4fecf8b66e29f31bfd5213b9. 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/QMFME2463773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bc84138b13fcf7690018c9bdd3020471de384616894d359e065fa9813b3295. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMFME2487806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647aa1cebc4d68e7f2bed73d9174b74a8bd15c26a7a21544fbd0b2054895f1b8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QMFME2487805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858c27161835fd62ca646c69ae53cf084498667146cf25d92390a5adb09b6bb4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMFME2487807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc782d61f8c8d8f94a667919fb2069887e5045fa27c7a9e92639ffc4ecd5cd004. 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/QMFME2487808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c0cd8a14912bacd4ba2161202d71c761a4262808ea0f3b1dae1b673df842a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM6MZ2521106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac1201d8e81a8f708f377f52e9bf6667d20d09b0ced66f8f71bd18ce6ff15ca. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6MZ2521107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cd72aa50f2254975e6a3f9aeee562ef5499a37b5d87ba2dc746a26231b4a62. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6MZ2521108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ccdfb04779044ce5400d9e549dcf43ca6625a8e0df0ea57f002437fe750ad. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM6MZ2521109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48914793a1231cfdfc7676ca08afb54aa06321a631d08305a4f0cbd8a85f1b56. 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/QM6MZ2521110.