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 0x9dba4a5575dad7352cccb5b8c920dbb1c6c245727c433762e900f313e0cb16c1. 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/40d35d81-c9d8-470a-8bbc-9248e2c4fb6c.json and https://artists.proofprofile.net/proofs/artist/40d35d81-c9d8-470a-8bbc-9248e2c4fb6c.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 0xd06efbb55583db9da49c686a3f4e219ab788d37c6725f17e1b16a141c6cbaf3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152301536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217b792b0bb46e784a0ad81f2c8a797bad19f36af8759a627a1ef67cfe884a8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXF152200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e0c47a0b8584b1750fbd865538213f4d9c706a5b17dc7cc71340b75bd9d8f3. 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/MXF152200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1eea2afc213be932ea60280525ff273b316cf6df18e2acde2dd690c798ac56. 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/MXF152300414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a458db1e080045fe252ab7140fa5f3eb9b2169379816a9bc85550643ae03e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152201036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036cbf92dd22e7b3622cbf49a7c37122bdbf681802947bd107ebd768b4bac6c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4602a4892fd89399c764b3fde252f8e41631642c2b2ad3109967f630ca3285. 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/MXF152300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a11fd25e741e39f8c957bedf854530fc5b45552de1aa936a5394a163feee2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2434581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac2c2f0225529fa795616fce04d9384c307240073a4dad912fc66ccdce2eaa9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2417775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b46aaede47cd31875aef9b7e18aaabab97111376e017d7690175a97f9bced. 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/QZNJZ2435867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6a48df6e31fcf1b665b95bbd9668333746789e354141dffabae11bcf455fcc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2492806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6b085b54f66d5050d6e627f3c9d015ccb57b5d0fe5df7062f60c7440a7f90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2428286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b66085ac2ef0d90b9b56afff3c6e5543655cdee8e2962407cfb9629af115dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a458db1e080045fe252ab7140fa5f3eb9b2169379816a9bc85550643ae03e2. 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/MXF152201036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e0c47a0b8584b1750fbd865538213f4d9c706a5b17dc7cc71340b75bd9d8f3. 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/MXF152200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217b792b0bb46e784a0ad81f2c8a797bad19f36af8759a627a1ef67cfe884a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1646c278a2c6f10fee2bcad7dd8cf03b2ac3b5ab4a4e67888b32866a27579473. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJZ2111323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d99fc32a4c14295ec531b93b9465c837c4a18bb171185a85433d8865f1b29d. 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/MXB872100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248f09ebde18ff9066ebdaae4f0cc1eed22a19cc7894620c2f00fe635b4d4b49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM92177755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9354d29993ac907bc6c4c26cfa23acbe2d269e9a5edcba08e13768d539e70500. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM82185742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e598764863713c2103a73f8baa46b257623ba81088eb493cfb8bc6fb6cfca8c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM82136980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1df80bd4957c6bd76c5da4481551c485a560557177f9be9d43a321ea7d02dd0. 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/USCGJ2198836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c1496f4a321ece474086cd713cefdde36274e093e186f7ec4aa7f6954f8b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2157602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a9061f2900f7dcf61999fb0eb9dd8f248d7016414a331d420856450f7b8f76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH2164640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc417fcf967a1d02977c0f283f3b8d04461a5dde53807225c178d14b74f972b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM92040464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d4cb693b50929e079c128ebda8c5bdf6a9ed3684a4e6f656b5e10fcd00cae. 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/USHM22033639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f85ccf8cf0106c3b94f4f058728cade1618853c3ec8c5237259b2367548bd8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2094495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924ba2008c850c764e2a47206a08cbfd424432842505ece50c6562f0c444b627. 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/QZGLM1960013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fc844ebbeb6b00e580234c965eadec1b954ab8661b6bb8e826dd2f5754972c. 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/US7VG1927647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363bee78d593531d758518ff3ced649c58a9a06cb955f2b03810b6917e2f5f50. 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/QZ5AB2029876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1118db2f0ed129285e857ab483b0930f52daf0ab534ac6cd1e6379d83c795114. 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/QZ5AB1881048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43decfb7ba81c9569ccfb9aca78bdf567ff057dc13adf655410e284fddebfcb0. 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/QZ5AB1646786.