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 0x9106cf32030aa0342f48c65eba1899df945989b16365c238e27d4dfc2b3b7810. 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/2f2a2c0f-0f43-464f-aa56-31553f4518cd.json and https://artists.proofprofile.net/proofs/artist/2f2a2c0f-0f43-464f-aa56-31553f4518cd.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 0x7d84fbf7bb0482dbd237f8ef4a9ae980885c7d9fe9633a8339e980246e7b3f4e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US6620500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5015fddcc93e2ac15059efae946b56e09dcc1c82aa91491697e81dd6aba0f936. 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/US6620500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e13c53431fe34d88c2b0dc2589d027dacdc2fd84e07add6c9c8c0094150b00. 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/US6620500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce55e012831a0235b14fc9456bc55a508da175c33bf071d876aa2760ebe5fce. 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/US6620500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd466bc267e32b7e1f4de9f59122b541fa0edac7fe882230530c91afce8133a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US6620500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ad65735adabf66a9a191542b4589a347be6fcbde42c15a9436c1b5305e5c22. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US6620500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d40e16aab2aed929032f5f88a6f2564fc23e5ff7385f64dbf5cd515d3e0d647. 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/USVIC0116701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075481ca8bc0b7ddbb4bbefbe401e7b9d13d2a6b36a817706ab7943288ae873b. 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/USVIC0116702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6718488adf50164fb6e88d762902fab0579387936d564e39825c58b56861c7cb. 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/USVIC0116703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76f71da5103526e291bb0f2718a6cba382a385bff6ded3f00a2c40031c2d33d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USVIC0116704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd296810ebbea35377c7ff626e5c6f0e36bb46cf4fae9ba43595af04cf1a89c6f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USVIC0116705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afae232cfaa817046fcfc9ccc77a915c64fb676c8edfd279fce46e372a0234f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USVIC0116706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf5251c28d6adb717aea5019cc35c6ac62a0764f473529b01abfa0eb308d58d. 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/USVIC0528302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7e6186137f2b20508e4b022561107087af924682fdde592a3cc2b7e5909c3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USVIC0528303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3660f88d58f60a478ddaed61227c8f4a1eb5546e012971e13724933d4c4d4b3. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USVIC0528304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c0ad71a07230e2865fdad7c3df46fe1dd41e8c8c1bb8d6803b5b0c2e5fd263. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USVIC0528307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d750b19d974341aadf033db8eea2dcdc09b177c0d29a6b017777dfcbd916f7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USVIC0528313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05529874897327d655ef258ff742373e533f86bae3efabd798e3f4c3b428510f. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/US2641423001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b9f40dda46cf9c4785333a26b09633b4269a0576951a76b268ec94dad3af30. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US2641423002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95100a40142c7129c9dd77a0c95a0f5b3c32ebe1caf96bd18933c9d350745af. 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/US2641423003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833f2795a0508cbb14ef0edab2ada818b671b3aee3dd8683d1c98760bebb6e7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US2641423004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d14fed8b18976f5b91ce72215cb1d29d62b04d77a30306d6ac4cdf99bb5c35. 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/US2641423005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924110a22fc5a8745a589911a72ee3edd76d788e522428e8bb163d9dd51b564e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US2641423006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951093bd6006d0d664a1b1bb488a75c696c98286907aeccdfaecabf440bc60ef. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/US2641423010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d0d7b6298804c661467af80c94330fa6df216363d229edae6512e98c1ff85. 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/US2641940501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d0d7b6298804c661467af80c94330fa6df216363d229edae6512e98c1ff85. 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/US2641940501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e315ed502ef234a2a559ca3a413b0558b0c274f62c16376b6f2cf40c084e585. 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/DED832300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ed90f2851683c6c3a12c6bd2428de2316f3baa77a553c10f11526e1a7efcf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DED832300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b846a2656cb5cc00dd933874045b66f2c54d0a19f1bdf4a533ef2d57deb37e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DED832300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff505ec6847d3146cfa16fcdabcda09501777bd0136b4da4887bd9d54db1704. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DED832300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa206c96e1abc089e55e332e2dd942dd333700fcb0f18b074df63227cf248eb8c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DED832300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6297aff0edca0d58522c825237544672ee254d42f9a910ffb2ce23caefcafbf. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DED832300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685b78c39df7b6ee4ccfbf0fe7453c5ff56712d963faeeed3267066aad4307fb. 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/TCACH1534394.