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 0xcc3f7e13ccb6f04591dacdc67dab776ec15683f85c21cbdfba6c96ad4086f74f. 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/67dccefb-a147-44f2-98ac-d72a5f660fb0.json and https://artists.proofprofile.net/proofs/artist/67dccefb-a147-44f2-98ac-d72a5f660fb0.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 0xc2e867e753dc4b4fdd42fda4af91c0caa9960e86713c46f12d025db11e194d4c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM3DF2212624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798eebbf0daf7812a6992c16786d1b89710168ab61267f757431e2f526dace5a. 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/QM3DF2258260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247d5402fcf40a6bd200c1f23e0368bc4c71e84e0d8e80faf77da1a82e1e6039. 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/QM3DF2258256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12832050c1fe7657d79167797d1ee2a676c6f7cdafa5b5b6be1864db780e7f54. 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/QM3DF2261263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd4d786719d1867a620b72ec11799773a990bb4501eaeba8436f7ff6f3a49bc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:26Z), 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/QM3DF2271876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e848e8bc7aa611121e35e16f9f90c76d71f538ab7ec560084dec7e8c7b4c7e. 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/QM3DF2273255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4a0421e345ab8af832585caca037e46f815b9855b3e139d4e95a01dd56a769. 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/QM3DF2281654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6530f87d9b20d94e12a12a0b6cbc515041604013362d8a2eb740dd4f199a73e5. 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/QM3DF2281655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f654d2624184863db5ca1210613b3351fef6a47650fd8a15c5cc072b31fca6. 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/QMANG2214133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a479047c4b207aaf642bfab8e970318908a43375651e1ecccbc7b37e629b26f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMANG2214134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c9d51f604e518999d1762d3cb23ed6a0db91129d10452c14988db0a19bb638. 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/QMANG2215441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da13d46f647a8a9fb1bdf5760e02d9b81dda4ffdac8210696a4e2018694cf0e. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QMANG2224350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6b3d7171354850cd14c26e378e005912fd36bf39bece950beada0b9e4d443. 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/QMANG2243480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df65924c0760b516a8471979ea8d030a5c6dba9df7d7526409eebb134b739a6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMANG2243426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aed84bfae1aabf22e610efbfa2c0ce6b46e9b7de96cec7f0a7aac6b76c601cd. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:07Z), 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/US3DF2441820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8185df544c599d9acff1501c18444a1dd49d2840518c5c380fb18e7149be81. 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/US3DF2441283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe453497bf727e35fe9d7025718ffc584deec9a52614308de337a0bbfa097de73. 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/USANG2482508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d86a97764bd6e638208d037229bc12ed7615518fd9f6291b2a8f6c2f7a94aec. 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/USANG2482524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c2f34ec72e43c6f21a258d5fe56660ccd47ce5c4e7902ab84070658e1b63ff. 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/US3DF2513759.