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 0xda6a5ed17f7dbdf6ad27619db955114fab05e20d9482270a8e7dd9062f3c08a6. 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/9779dbde-275f-4604-8ac2-8c760a312d54.json and https://artists.proofprofile.net/proofs/artist/9779dbde-275f-4604-8ac2-8c760a312d54.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 0xa917749844ce5f8c1f102d3745cb872b89c881f2adeff6a7e113c095291cc7c6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USDA12208550.
I’ll Be Home For Christmas (feat. Ella Jane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c55f770b6078fcc48428b8aa1ae0d07073a1026a8040bddbde3ea7e2475322. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USAT22220027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290e8ee9a3c077ae3ae62cf90c1b8be92c046cd905d1e1773b2d6b301c8dc12. 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/QM6P42308705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498b66e071883cb3244e2aac2792f79cce8bd7b3f403e91e51a70603bae6519. 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/QM6P42377454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498b66e071883cb3244e2aac2792f79cce8bd7b3f403e91e51a70603bae6519. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P42377454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f08a7be42d3df548d78f3f70b2d4d0fb1478403d3f0c17830ccdbeaef7412f. 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/QM7282383044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ffa8da59e3f78fdd8049d574dcb12f9c6cdf58957709adb5cccf420a03ac34. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM7282382954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa037f73c436591403e7251bd80015f5cdc5b0638dc246349a0d8da7115d64. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM99V2313603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4e284af406f2d8f2d6bcb32ea10204e898f7a29af46e70e6d6b18f2f22aa8d. 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/QM4TW2491195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49dcac46d8c6929ce90bfd402fe15c9f5f1d820f2bae0a7a5ba6cd6e2d2d3be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7282382994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f08a7be42d3df548d78f3f70b2d4d0fb1478403d3f0c17830ccdbeaef7412f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM7282383044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbf458e03dfe2aa87933275034e4813250a5a97fa408016d270be4ca01518c2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMDA72458089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc059d2489959dcbcb5c3e9ffb0026bab575aa139382edcb26fd3be69142af1e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62482788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97274dd5d31f3c25619eb5c0d097dcb65e99e178bf296f750862b5bd315f220. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMBZ92466522.