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 0xb9eba558033a1d3bcb834fe0a3fae5c1080cdb290385f33fb79c29994bdbc2e4. 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/f1ce9274-cd95-45c1-a065-e9f5908d66ca.json and https://artists.proofprofile.net/proofs/artist/f1ce9274-cd95-45c1-a065-e9f5908d66ca.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 0xd3b3586b5d18ac4d16fdce09cdaf62e25172d0e9ea8a0b74ecef0127d15893a5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/RUB421500788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3225b276d9e8c1c60c3aa81fa49e83bdb868b797db9a44043c2262ef1d964cf. 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/RUB421500791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cfabba7387f5af90134f90388bfbf0df56e32dffc92aa7c10a4c7f4d56de8e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUB421500794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345bd938992227734df6b83ef2171ddf1736df5c04fbb999d1605627d9e0cc7a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:24Z), 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/USKEG0810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591ed846384926acf6071df3909c3faee7869004f8113c31f892942d860d2a2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:15Z), 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/USKEG0810011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d7c20759ce90b4862e8df358eae81962d32eb5e3c2a7b95794ee487847cbb6. 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/USKEG0810013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e0ceb21f44615d933800ee6d98c813b1e823a83538399baeb5e63a59a35c62. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:21:12Z), 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/RUB421500801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23c7709cc4810adb0b551021c7ef703994e186151d4d20dcc971644d97eda4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:52:46Z), 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/RUB421500806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde11d8d35a4af197a5a398eb03fea712a9dc2678c556d69b03ae616c8e292846. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB421500809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb016e59706de597f691e84e932562ab65d5d0ab70fe053e42d38cbd1b075d360. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:51:37Z), 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/USKEG0810162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2ba7d083802307352b235cb90ad260ed0ee94d7504e053360721b6f9053a15. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:46:18Z), 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/QM6N21790209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe27456dec5815f3642cb58e6d7002012fb7dc0f335cefe24e17a21dd7e88e6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:35:09Z), 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/QM6N21790210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0edf4e894a674dd9f1772d4d8c6cfe13ef3f5fc0ba5869421f9635c75a0e8d3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:43Z), 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/QM6N21790221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd92491279d682a6c5052734fa9e7ac182b2a542c4e3afbc0875502e8a11906. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUB421800899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec75d3cda79d4987bfd3bb09af55fea07cb12b33e02695785b3b2ab4fe92927. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/RUB421801313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3da943d0308d5a79d6e2ea7c77da8bf8ef0d4b304f78f2b27195ec17aade0e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUB422000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e7f431d30715ab04e2d9aafea8b097d95f1c86701befcac46caa843b471112. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUAGT2500837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78e06cbff89e59589e82c7f0b444171eb4921e7ad29345e20ef36a78a8f0e5. 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/QMFMG1513857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b445e305069148ab8dcee9e2ae151baecad73daf599e3b211dac28a55836f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMFMG1513858.
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 0x234beeb04bd093375667a98bbba9c806f2e3d87da77e0c14d162015003545427. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMG1513864.