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 0x751b3be72c0aa1a80f2657b1d80191cd3f3f35fc1d3949312e0eccbfac29b780. 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/db4adbe2-8a02-4e6d-92f1-459377492dd4.json and https://artists.proofprofile.net/proofs/artist/db4adbe2-8a02-4e6d-92f1-459377492dd4.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 0xe211e7b9e6cb24392172273a84aa3703acd0c04904dce73129fbc365052302e3. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BX1KG2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4367f63274ada1cbaa7b65249e21fb8dedab3878a1498bf7b0ee04e22df3be8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BX1KG2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a253a10226e62a148b92748ac56b6036f1b2005d2a1084fa635ac8fa06621. 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/BX1KG2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd26d1fb5d9ebf1927482c28548d88e6f2bc4ed52fb2719279bb58fb63fa34f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BX1KG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239408c6b854d00068737ff1c4bad544808880e8466dbe45956ff9d90b923c7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BX1KG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239408c6b854d00068737ff1c4bad544808880e8466dbe45956ff9d90b923c7. 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/BX1KG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd26d1fb5d9ebf1927482c28548d88e6f2bc4ed52fb2719279bb58fb63fa34f. 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/BX1KG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a253a10226e62a148b92748ac56b6036f1b2005d2a1084fa635ac8fa06621. 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/BX1KG2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4367f63274ada1cbaa7b65249e21fb8dedab3878a1498bf7b0ee04e22df3be8. 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/BX1KG2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe211e7b9e6cb24392172273a84aa3703acd0c04904dce73129fbc365052302e3. 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/BX1KG2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd258c4b9f389b91ca96a59e65d21126c2f438d281fcbb7582642506f573e35. 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/BRRTF2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e165db9f84240f179192bb7bb9d208ef122096654f2566b0af1aca6d37de2f9. 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/BRRTF2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e5a4b0ebb3f2a298e810012e3f54fdc7cdb65f982dc49af77a3e845bb87f7. 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/BRRTF2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328ba2cf6cdebe8acc90d54ba275bc1b0a5255c3579b748ef6cc52de062f8a7. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/BRRTF2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265dab0f05608ba78a3de2cfa966a5e6af3a674eb91cfe34ee3e01cd49cf2c1. 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/BRRTF2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3303753b372fb970d32184768dad71d95e4ff9a97e90926aab1fe13f15678053. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRRTF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359cca68a0d3f6796e39d429d17b65c8763c4134979cb9c18cd17b79957ed1b2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRRTF2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe20c1fafd2b872dac65d3d81bea61752663cc8add7e2413957b98aff13b6eeb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRRTF2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0930bdeb7ed02e35a760f3f90b150101c1a30028a37a9b6ab2223d65d2a062bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRRTF2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe914ec1f69d3e9589d0048e090342c82c47f82dfbc077d9454683d91556cb4f1. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BRRTF2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8949e784b23d60bd44466646b68c1720bba369b36b2949cf73eaf47a838e0ead. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRRTF2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a3881f93847e6ba09bcff0ee365bd90c59859613d2aeaafb431d8efe770670. 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/BRRTF2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdb627aa0172d26c9032ae56f38ea9baf02ee62c77303bd9ebace896f17afce. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRRTF2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86f98f658ee35952d8dcc71206a0e87e9cdc867dcad8911af363e3b2f86d809. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/BRRTF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328ba2cf6cdebe8acc90d54ba275bc1b0a5255c3579b748ef6cc52de062f8a7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRRTF2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1474f2535b1af745f856f4934561abcd3ffd7f438029195cd9ce52b92f05d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRRTF2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42880dbd8dae8c4d4ebfd1355abdc311e1ea172b0604373b48b9e549fa1ca8e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRRTF2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3215f5b387841a2e24ada0b9a4b1263c5c09a306bfde62b3c10cc00041842412. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/BRRTF2400007.