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 0xfbb8e12ed1cb770515d3173b2c3b6b29f37a970b69122a0f7900e1dca70f92ea. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/992bd0d7-ed94-457b-8b9e-b6447d6f5b7e.json and https://artists.proofprofile.net/proofs/artist/992bd0d7-ed94-457b-8b9e-b6447d6f5b7e.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 0xc548341f62491ee3a51fb85c4e191175535eb50f6a67f6fbe434219b859b7a4a. 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/US35U1016701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c44698fb4b4176f5b971bc1357b0b75de0f804638e4866c4b67054315dd5482. 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/US35U1016702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cbcf5c804a97f921ab1d6a1570d397b04da71d6a9b5d4ba4575305c0f846de. 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/US35U1016703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5792f12f1f88a5790a4dbed2c8a831e09e7b1e41693d01dd987be46bc3bf03. 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/US35U1016705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323cb4b02d43509ea077a83ebbb7309ff6dcde44e70f825045884e1fcfbfca8. 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/US35U1016709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c3908e13d048be8891626858cacfd596d94a244a0ca5e465eb87848054b01c. 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/US35U1016710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d506d6d291e02eb9f4a79c53a81075753432ddf7b3712e2e028b1f3157ff45e. 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/US35U1016711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae99da5821e5383a348f0950adb26b0e0379fafa21a423c530fd0283bdbc0e. 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/US35U1016712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d41234b5870f17fbd58fccc738f842e5b177955ad8080007b70562b5977c39. 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/US35U1016715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9cc178fd1a6203a445a448c1ab5795bef302f9b6ee9a8c6713bbd1019519df. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:56Z), 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/US35U1016713.
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 0xb6c283c4cc425955722a999fae087b1bad4ae59bbe03f1ee1f338ebdd72208b9. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US35U1016707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc122ecbd7a72cbd519b5d648e609c7e2c052682a4865708544fd6fdc4b57f697. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US35U1016708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24130b1a1d3e8d1f291558000fa57dc41e4405753c61e8d1072a36d9c91f0b2d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US35U1016714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bedf478f6758cdd1c4a4cb55a6f488139257237de3210c935e3742d14b71f7d. 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/US35U1016716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a707d8f808762bda3e6c89aa18f9ab3a2ce231a67020a8bedca56cbdd25cbb4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US35U1016717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf7362e038f6fd6e82ccdc9a81a4beaf152f911d70a60773667a3cd20eaf2e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US35U0896001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08d1a4931a23316431ac3b415ab7a02d81b540e4eb26186a72017712ea44ef. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US35U0896002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf465bc59e168fff9c0e1db722481cfd7325ddc0c866bea275f0f86178b611033. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US35U0896003.