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 0x26070812741793d85f96945df6677ddc2ad6753484928fed82a388febb4ba295. 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/bbae693c-b60b-493e-bfb1-77f9be5e370c.json and https://artists.proofprofile.net/proofs/artist/bbae693c-b60b-493e-bfb1-77f9be5e370c.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 0x1a51edf1dc5323ff88ce886109d9457aae55139ec71d2bfd632d1e14037a760d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAIS2480599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1f92d96cb70c5b726a00c2eab39998673177cee4682511f086e02a25fea99. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAIS2480635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831a7dd0cb0bbc699ed836ecd7ff524eca1cce59f39bec67e68eafebaab60d96. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIU2429828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2284d86ffda8d6fd84ba08df0c2db923eef278a6f757da913dca5eadfa826d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAIT2463279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9275f0900fafacfb5158a28e037837b60fdd56c6d2fe08aec1f874bf808d529a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAIT2463286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b33ed5ea3db0b8e90e6d19795258e7af2c6bf7d6f946781b9bdd6868b6c0a9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAIT2463290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58d538a900ba12acd758ef9de19808d16f5af62534941146dabaa3e084b98a9. 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/TCAIT2463296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ff75ced10f4aa840ca919fb4cab5c7698035fc50029de20fc6cdd113fa4f9f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAIT2463298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324062a1b9fdbf834504c2f0f52b855ab963cd3e34100980fe93ae3cf8220d2d. 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/TCAIU2463398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ddb5e5672236e51a58ab7c3aa82908ee28796be59bd5fd973d989c568fc06. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIU2463437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0117c8afb37939ef9a1a36a995958025b03d1bd0ff182608c4e9d43b1ed7394b. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAIT2463403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee877597e714503ee3b75d2397ac1ed28a201bf6bdb883da6e6e003b08d5eed. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAIT2463407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68c0f4f7cac1c9cde2e11408ab2cba83315a33bad3395903d6db699830ff136. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIU2463412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963506f88872f1070772f958985b2d11ee237984989acd2c2dc78c0f528b703. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAIT2463419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393bc898bb966a90b1820a88de27bc6a2105806f1bce2e197413ae6efb271d21. 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/TCAIT2463421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f28877812efa83241cf0ef1a79684f9573831981b582c51a396bda510272235. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAIU2463423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0865aa845243204b6a7770a4f2f493adac58dab662bffd5baa6232c0ceff6ab. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAIU2463426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa1d9c969f7d798b76ac2d152e7a59d528ff06001a899ec888544a8b4caabe4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAIT2463429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0312e6f8ac4d1d30fb6b6115d32d6470174a611ddcee3384258084b4eede5. 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/TCAIV2431229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03634c9973144a63b5c76e042f948c73e1c462e7f5dedfcffedce161694421a8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAIV2431242.