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 0x90db98468fda21601932f6776f4de29762f68ebc1572d72df283aec8490d83d4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9aa1620-748e-41ef-8e17-3f2a1847cc28.json and https://artists.proofprofile.net/proofs/artist/c9aa1620-748e-41ef-8e17-3f2a1847cc28.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 0x55b2556b5eeb34932193195832a7751d224b1358c29cdc3862309874004d4e83. 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/TCAIP2417079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4b24cbc26d76743b8c0d43ab6c53b42b4122cc4a9fe40c05449eb489e8cacd. 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/TCAIP2417084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec24076525c92a6c82bf3b3ed04142d7c5836215d79d99b32c9671ee7f25a5. 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/TCAIP2417089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf6194c4b1ae2f63d3f278f2b1dc858fda2d8b5744d35d3cbc301cc9ba6c91b. 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/TCAIO2417094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31e1c9faa64b9a3890e547c83bd36477250bcb7d635280ced89e657f312a3bf. 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/TCAIP2417099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc9c464683119b4a008eeaad2beb950b3d222c3aabc71d8738e3f1d94444f43. 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/TCAIP2417105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fb481a62e23c498fbd82cf440a287913a1862ad5a241fbac2acee8517207f9. 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/TCAIO2417111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe26771abb0dbc4d48f38ce7dc868967bdecb1419ffe328338c780fcdf1f424c. 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/TCAIO2417115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5839e19a461dfb94c914d6e4a7dda98d4564b706304a00ec762536532c6d619e. 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/TCAIP2417122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02732cf2906e8697ee62a0c9c93dc027b33fc3619e822e072b764af61be8d3b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7aec94d4c1eb09f06327d91bffeaa99823c8c7af9d1e23eb0d574947df4919. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c4ded6623c3cfc0e8b6862b0e749611f324230594f68174e604f6af8e26da8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9ad94190101e75df94b687151d9fa6e6ddbb93c0b355bd2556cf914026aaec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5699a9ae074ddb546081eac8b119e2eec0933bdcd8905d325218df7fb79cd11. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b35df08742da28650744cf3680d626aca156ca6abc1f8a51f4829bf018bcc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab59c9520f13e1780901806e95d8cb1866788793a046ab2d6cf19602bee9ef7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb855511e5bc1bb6e7063a0268145cbbe23596df6292132a71ae40cd02608192. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2333858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6240c52ad784d6a2191c6a0767c48418d62bf37637f750824c5581629867c003. 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/TCAGZ2340533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65954c8d4ef7f062218a8f196effbd0a3ebe8c0db6b1dfe404ec8c9145460eac. 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/TCAGZ2340542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79eba43e1b57d78a655981e25067d201f3f89ccff2a68ff05c604fa7a3995c6. 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/TCAGZ2340549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4580c25f4ddeba9b53286e958e696ef59470db6314cc4163bbb97bbb78dda15. 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/TCAGZ2340556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ce371bab8de8384208f1d05bf28ab3d9a6d35029a5933e6d8c780f845889e3. 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/TCAGZ2340560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67c4d9b53973463617a6b03a3bf58f5b642b6bb32190d125576eb9db52c127d. 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/TCAGZ2340567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f6b6bbb9cc9d2865613599fe886c4925e62cc37c2d01964f88a2147ed9a2be. 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/TCAGZ2340572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc510eeaa6ed7c967b904551267c0a10a133829880f2fc89c443b4c8fbc5fbaf. 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/TCAGZ2340578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf692e5272dd79d8f63c6666339d62cabec841ce3615bfe02490772abd91b0703. 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/TCAIN2426557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7794d4f506f93518949bacb694e863b8bf376750358d325fe1f1f1c859faad84. 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/TCAIL2453805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ec7dd65101e8ed4aa14984f9d15f5dc2250fc249e22c3202afdce1f111aee4. 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/TCAIF2414524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d38c5397deed98b6e37c940d1b7d08b87a44604c005ed1c2ae5a508ed6c24d. 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/TCAHN2314848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a292498c1b2337d438325f70e0229d8dc0f960139ec7631a007e0121240772. 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/TCAGO2271794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc87f81dd273115a31255f43df48eef560aec802c8190f5a0225362432cdf9c. 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/TCAFI2018053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb068bca57e765b3f3ced44423b76819e6ec6cd0aacdae2b8ea5a066be0758286. 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/TCAEP2034819.