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 0x3f7e1823297dddaa4683fe9bcaa231b67891ae26985e19f7703485bdcf99e94f. 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/6067bf7d-7433-4a7e-8cc9-74de007f1d07.json and https://artists.proofprofile.net/proofs/artist/6067bf7d-7433-4a7e-8cc9-74de007f1d07.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 0x77063711ca42847fa997c22210c9eaf2380391d5d2f9611e50f7bf2fadc8a796. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZRP42148998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b1266864d0ea683074000ca5524123a2ca227d82f220c53172cd603ece93f6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZRP42149000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5150c9bfed685ecc506cb6d604ccbbeb5ed5f722da4370362c0323ef2a179d2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZRP42149008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351f2deb99b66031722e8c12192a77a9387d6e4c9675b1004f0185b48b04e90. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES62326890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471432b104db5c6e3e17298e7bdcbf10d1957f979779998f574c81ebd31e32a2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ62484190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350f65b3e213aeb2df40f01b50d921f9d867d94e40b368f8a35fda0beb41e1f1. 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/QZFZ62484191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a22d11b8c32afc4e249c4fbebc67d3bd13a4a0a81883f1839e0246d6d07958. 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/QZFZ62484194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1df48843914d74a5cf110fa97a9bf141b4122aa589925bcf59e96ee7d4606. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ62484196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3ebf2bf1d95118fc28f532bcec676215d2c8ed2f312f9ed53eaa8fde74acb2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62484197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47959e2baa859afe33334e2a658252f6075ed57e788c352979bd2212e5594590. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZK6M2416783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c830bf16dbdf8abd6c5985100ce15c2a200fffc99a41bc8b95fb9922617831. 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/QZK6M2416784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480ca6c5c8ee7f78597bc919b673c59d02a54e3f0fbfbbc09421974cd4725cc8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6M2416785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586116fb160747264bc25af8aef5468bd2fd91e19d535603c3ff2fef3bc9934. 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/QZK6M2416788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9a05dfffdecec9b68801f88852190d50c871691f09f954d5c041fe49cd7b31. 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/QZK6M2416789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c6daaedbb8a008e993ae82800035b96655b7b3036461c889a5138184c119ec. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTAT2410813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ccecee84c008d78b71681c2dba92a491c4d29e168b13d07b0cc3d1de227743. 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/QZWFK2465692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3730bfe46cc9afeac932c90a602b84bcc0889b678585346d2ffcd172adbf541. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZZ792471286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7b1e748aa0c0d673dbab69c84f107931cc13eeb31addcdf79a7bd4ae74d3b6. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZDA42537788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d660fd93576f8415fbb36f442c32fda39fffbdafbd0394418cc4dbfd334cc2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7Q2404210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5449a42d2a1c3b8f2791194360779aa388ec618f345a25016274ddef70e59784. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFYZ2524195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7094670e5241626735ae39d4cc63f45e02f0490b9d4081e048b3571987fdcfe9. 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/QZTB72595681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39739baa72461ee5970a22c6d1d1d279ca9f8483e14e64d453d07411484de59f. 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/QZRP42548658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4185202a3fb1331dccc5f6726907a8f5e52ccb5eb5ff848adb61b45d8183c7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB72595682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa043705d95024bc1688f6b48585ef5d9ec9d746588dc1e2e6dc386ab523cf42. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB72595683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e734c1ce2879b195be2276d0b2a1a7ad7dc17fdd5ae8bd0c75f219de0c630. 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/QZTB72595684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfdc035c3c32cb29839bac781f122c5d26daa84f8dd97d4cc600085e2c59db. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTB72595685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec57deb2195fbae390a11267169103fae0538b0d006b45fbd2d0434e5453f984. 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/QZTB72595686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfcf6bd0ebb062f2e6bf0899c4bf29695c424c43727a91639f7a66f3e77c66a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTB72595687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915f1dd37a385bb88ccb4bf39488dd5f9c6996323dd522b6f4dd9c3445ad7365. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTB52563990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1877bdba44e7a430ae595a306556ec3c2f7257a00d1a18e3c0c78489a4ac3848. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTB72595688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4883b16aa54311afe84aa8aa9be0b17a21578f352873d82e9977b47440623bde. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZTB72595689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d810d358be9817c709587fb7f85a20bba1986f899a4d0b20a301a9091e4bfc4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB72595690.