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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b5484f13b1af9f69d24f26f6ef446264ddd61bf26810fc35764b3e621df24. 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/0178260f-812c-44b9-99b2-f33cb3dbd2ba.json and https://artists.proofprofile.net/proofs/artist/0178260f-812c-44b9-99b2-f33cb3dbd2ba.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699300b21aa3b4774299331d65f7fd49d02447d5c2c4ee50b1c1bd6af567bf84. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMA22019183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f1187cdb2715b907a729f4298de6c0237f284ba430246055d9c016f4536dc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMA22019184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c04d1325f10faf9c270ff48095cba35d83cf0de64a9c5db6a25ae64b94b0e28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMA22019187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45be02ff092f3638c3ac9b50e45351870da96d5c2c9b295caec7af74aa7f148. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN51975708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb110003b702bfcf1a7c4ca30ee2d7ef7d13bdb69c14efabef2f53e8ccda2e271. 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/QZHN51975711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f019bdfbf85af40e4f750794cda212a5f9822e53c69cf7cfcf0c5006fa73eda. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN51975713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b09eb8793f35bca4d99e69a74a8b14401aeca211cda77f143808bf35ae81c0b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:44:58Z), 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/QZHN51975712.
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 0xb3a0bb5a70a082eddd420f24ed62ff670be9d240cd198ba8bb46e5ed8c2b929c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHN51975709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc512bde9becf5a52c0d5e37e5417502f74c7f51f81fa460280ab46f7d533503f. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZHN51975710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0be7b67ef431a6b662de28b55149918ac0052e4799872504a27f852b569a36. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN51975714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943af4e56c3dcbac060aa713b689f7333cc42f055ae85ce7877e110079bbb07. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFP2474696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c98beff07af51526bec8c8030b4c3607bcb3d3076b226fccd0e8c0bef7b10d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2196320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96edee3763efac44597f5c7411ec78fdbddc0bea63170aa0664314cba25ff287. 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/QZNWW2007328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62ea99a0cdfda449910d9088f57917fdac6e0d80112eb1470de57cd11c61451. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEQ2038630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b15e861bd567e977c3d2aedc708492e7ce55e23dddeacbfbc5f8d4b4991a7e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6M2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2df92d830f1f95bcf6f0374e384ac45181f361dc8f587ea65c8b8c397ce0dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES82005590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0bd3e41274426cf46974bbf70a4ace1a6e3668e6b8b3b41cfaf4fb9802888b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2098666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cbf4f374d736b597c86ac1505e339047d360de12e0babac62a9be2536ec5d5. 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/QZFZ71924311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078691a1122f0edc0eeded68b13780f0e5d2621477497b229d62a974b7e7635. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES51912689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1995e39cbee84102c370006472e03e40e143daddd1fa69371ac0753a1b845232. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA51918970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a07377b5b227829198c343473de8b37188768f43c9b7715610de4a601e69ec. 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/GBLFP2313994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee1c92d74156a2dfbacfe5afb96480831a80ca879fb14407664edcfb161a32. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBMA21848526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1625503d82d410cbfdb59afea158b76e7f8bebae2b8dd9b306a24e2ccd9de4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAFF2062002.