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 0x0c468509cd5e57c1b24e1eaa0603b70e0cae9c526a97387c103d23dc570e1939. 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/b3d16301-5a8e-4435-b417-5ca61130f3d9.json and https://artists.proofprofile.net/proofs/artist/b3d16301-5a8e-4435-b417-5ca61130f3d9.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 0xb1bf0fa1f0f640e78fa22d93ed7600c22b9d84a29bd27747349b629faeb0df2f. 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/QZFZ41928998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2dc87c6d9c1239a47af45e10225f8e0ab272a5daa36b959eac07893728c0ab. 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/QZHNC1984153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0333e1e25aafcf4c14b39cbc5e6c55fa9600ba1addc5dbb34d62946d01be649. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USA2P2012146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28b55e36b3dc37979f1dff055292562303b07d7ff0836dadc67c54e921a99e6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:18Z), 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/GBKQU2115930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10e1939c05e565936d5fa9d3930bb2c2689178083816b654bca812182cc5cab. 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/USA2P2102514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc3067bfe25ecb8eb4ac05384dabc9e09167e54de442ec1db7d238121e91fbd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GBKQU2115939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a0c9e24d2c5585cfe5263c4073ddf7207c26e96999f7834e0f76a0d603df0. 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/GBWUL2323490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6329dbaec4fb376011c573e38cd6ba656787c7004f30ccfa30331ac560031e3d. 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/GBWUL2323583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc154f3bcd14f17ee2751bf1b2e2bb5abedb226a1f6ad5b67982cd599621a4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBWUL2323601.
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 0x3ca227d5eb8b2325f4f60d67d42ac4e4e5c6ab10883dc1ce2b1ceeb526262718. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:17:29Z), 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/GBWUL2323610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0513c4a88cb0d8c1fed0715cf36355d090f8b12227c72ee22136bd80580996. 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/GBRKQ2390583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba977bb7d6aa1c1adc25d2f101200973f2ecd8899d4c3cf2af55117bc132be1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBWUL2323624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484ffbf4343f91b8d52b269da28d32064c4725dd32a205be3404acf2cd7349fe. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBWUL2323633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66709b3e659a11fc2db203800086f4e7828dbcadd317783a45d2f6e4826a1252. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBWUL2323644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a0ce7e02f74c9c42bc1010e95e63bdd2fd147cdb9ac1d417bf39fec4dbb5c3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBWUL2323344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097944ae8b2f96fc53ec6b42b98a3a60fb96ae3fad8c453239511e642a2f66d0. 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/USA2P2027065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088312b6d56961dc38eeda386fd652d0f19052e67774099fcbb8b4ce2bc5887f. 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/QM4DW1835130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd034872634e0a15febff8ecb1dfe8e3c87314ef776fbd54965079bdae780e5b6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USLZJ1835937.