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 0xb0ba8ecd988f28551daf6713a03678dfe9ed6f89399b3b9113a21e21076ff27b. 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/62fe39ca-8258-4c17-8717-a5c5c5c8676b.json and https://artists.proofprofile.net/proofs/artist/62fe39ca-8258-4c17-8717-a5c5c5c8676b.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 0xa136e030274c6bcb6c80144c1900845e193c3e76fafb0a2179e68627ab4c8f8d. 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/QZNWV2461981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5000f2e798dae4460510b4f3baabf0654a5da1efcc63dd883da626d6873e721. 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/QZWFH2448347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143394a424707027300a5b8e1cf8fba3205133f12783e01bdfcac374984f19c6. 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/QZWFH2448342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03fa6533f98f6db5ccec3d7bb75b0b45fd9aa564618f5512b370277f5c7dd52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWV2458975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8be9ff5877cebafed2fe8f34d3bd5cc8368a28a6fa25897bb28d7c0edc6984. 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/QZNWU2457502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b89d1b8b861d0329e361346e56d6a1e4190d4d82bbfbbd2fe753a68261f29. 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/QZNWU2457493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85cc553579d217ee90558ff71db0118ad8723e6bf808bc19e0a0c1a0186b79d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN72403728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1452d695dd233b8e93815919057d282d85b7983585d2a7cf18fbc829cec0f6ba. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHN72402411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7511c565e14a2f0f5d35556c9fc11d5b021c002836e7988b0b72517e1bd34c0. 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/QZWFF2328467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1c5070ed02712df73a6be2035d0aea9e157ccab10b4c95125cddd77d342707. 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/QZES92476926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e4ff7cddac63aab02979da0707d62df1bbc6694678a030159a268f4d85892. 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/QZWFF2328466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ad35149315e44324cb9e999472e70eeed426dccf7a522e5db95e58ca7efd5. 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/QZDA52455262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3dc0fbdcff0c149412c34d884f65efefad92282845ba9a65f2dc69da1fc96c. 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/QZWFF2328465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c28ec99df98e9cf4262ad3c3b77450c8b25a2c2cc71cea9cad9c593f620a3. 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/QZDA52455261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5987d7c58f77fdda8608a7437f2d09199a780740b42d0efa5daf1fec3e5c0266. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA52454609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772b8c45daa99cedd620f2cfe2d505b840aab7a48b10755bf0c0c8fb0d40dee0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZWFF2328464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8f2f186dad7207375a3709bd9533bb7da9fdf5e625afd22592217062aed0a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZWFP2356252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b0d632401666617666bebeb65d4c5951f614a7aba29578c36f036c1c0102b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFP2356251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cc913ea81b5522ee481bc22828a34a6d9cdd904ca060091de46255ed12bfbc. 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/QZWFP2356249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be5b2f8e39c6a9f8724ca6f6390cc1d8a075671b48d6d7dc79a2ab2981a3434. 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/QZWFP2355491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb102b5b83fa5c5f777d0a60223fc04e5e435a5e11601b04c6b3a442249da08e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFF2328068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66542da2ac2a71614c3ef573041afc4daed98641d7c4df495c5232d21485be45. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZTAS2350589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b324bfbae034502f5dbd5416faca1d630e613f9eea90eba7afb718991d3297c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFF2328463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f10244f6af70c193aab2241f36ad6f9c3dff3a2c796fa68045a76901b7b76c. 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/QZTAS2350586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beaee597308c469f53e8c09e070f0b1e8810fc6e3a90ee4bb870508700d26f1. 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/QZTAS2350576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4449cba6a6bc3f35a193f689456226e947a3955f4caebe59c3b6a2e4a5135b9. 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/QZTAS2350575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd0216386f5d870d13f687b6e4fd06e264d3728f49ba1730b97bc43365a68d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTAS2350573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d67807716fca9e1b7934b6f21db9c0ac1c0afe10d6fd6216bbf3597cf79e1b. 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/QZTAS2350570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3dacdc7ccafc0347687f7d34ccbbbfd9b95f6a9187bb70a433d27607bdefbb. 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/QZTAS2350568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745c486de8ee7cfb5514f52d5858c7b2011b85004a9dda271d65c2a007a86ba9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMEN2303354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8292db4d7826540e14f8b07869f055c7f2f8127d1d739bea18f4fb8e61fa2e3. 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/QZK6P2399651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a5eca7c4be25a7c81fb691f11b78fdb559c799566881214b94b97f7be8a0e. 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/QZHN42377915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7307bcfe1e8753b07b9f2ac1082e8adae8e8bf8f0638b81a42c927cd6f16fc16. 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/QZHN42377347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe657b74aa2106f48c85247bdb3293eb42cc47e9041e322392325d4819c939c31. 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/QZDA62395677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b021a0b59df48d2cc1ab4f419beb8eb86cef5b54695dba42a55620f6aae23d. 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/QZDA62398489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb48c2cbe1f4000435f4a9e8acd481cb10a40d9a7ce1aa83a61636e979f88dcb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA62398475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1e752c929f1429a1ee58aaad4c63ab65cb5e01c8f6315ba7d9e783f5fdc9bc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDA62398470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca934434742704478295dde0128c5fa003c0c20705e5e76f05f87f54062cf8d7. 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/QZDA62395824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a33433258a18451318fdebf7af7205b1b6863c9bbaeef91c21bfc1303fac16. 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/QZDA52354080.