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 0xa6f35e88151f09a9a4fe460449811616de7b4f956e2b688a0f641f803236a409. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5360aedf-b302-4d9d-8a73-854514547290.json and https://artists.proofprofile.net/proofs/artist/5360aedf-b302-4d9d-8a73-854514547290.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 0x6bb7a56075bbd2229b2176857c6d62de0ae66c324b1a6aaa8a9373f7089496b1. 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/JPX492000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe3ffe3bd7f93b0df41f1614b286efb9390ec02faa8b3de58b2ba8815bfc78b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPX492000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc996312ab969d7df11e928aa9397027b4bbcfd4b4a9626acab007e6a73f18383. 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/JPX492000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f49cb6abd55c5dbd064c89c7204d22b7d603133b8853525721dbaf5bf6114b5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPE871903743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5876ca627cbd4e30df7109080948d76629126b371788eee43f1aec4525db0502. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPE871903744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0165c408bc2952957b6dd6cb3e5bf5fcf7347a683e8206f9ac0ae420e0b2c66. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCJPP2160395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc341cbf17d352ed7bd3c030d457e9d39a1e23e949e508b9e663a3f8527cbe. 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/JP92A2105212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6198f543d974e4352e7b3948b5c7637f3128e018288d9e09bd2fda7125fa229d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JP92A2204114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e7c72364ac405faaf42ca90df1df0a780878c72f0bab2c3233586bffe04aee. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JP92A2208395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a7f0ba1e2bb8c3b4125710590a40701b076c4d5c3978001a2d915cab0b491. 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/JP92A2314104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad4766f567c72cd848c6b81626deb3e93040d40715659020126132cd4a23564. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92A2321211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8995db3a29d4300ee17053548a2647d6a9cdd98d7956e76d87e26d4f5754ebc6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JP92A2434253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5590c6783d832ed7d6026a12d8717525d19f97b5d9fa1bbd5bc65c43aaddcd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JP92A2435655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf6d05d357a6467c9e9d0ce98a84db91ed46fad897c4018d34cb3f10b6d22c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/JP92N2514891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b0f6346aa2eaa4ef541af226d72d080f66125c78cb795f4044b38cbd34ed33. 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/JP92N2258410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd191807ebb3bd8c35afd880e0cd1f884abb8aff3b08af93901bde7192a1ce3c. 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/JP92N2511646.