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 0x61bbbf54d56d2472982b61e180f69aa5068129d930796d7226768d55be7a8871. 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/12b8df50-df81-40bd-ba8d-ba49ab617c13.json and https://artists.proofprofile.net/proofs/artist/12b8df50-df81-40bd-ba8d-ba49ab617c13.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 0x264763e13348ddc658ccec3c5e021009c4339f398e64251a8cd8900b051ff668. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/INT1O2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f4f14bb63289a3ccb5ff0b8e9a1409691783de2e52cc1717101c9e3c789b97. 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/INT1O2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d22015c0da7b60f1dbf3213fc466a6790ebdd8446de96dbe81df7fe10b3025. 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/INT1O2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477e85639ceab8091257121583c522e365f7c97f4edb09618626b8705b3c97a2. 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/INT1O2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b630c61eae598211df6d5e654cb4abd5e0c71ebdd5d2845aef29a2db080f52a. 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/INT1O2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108f66341eff5e440efedf47798ad4ca19d1cb4cd550396584b7e2a88bc3eea. 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/INT1O2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7d5a7369f0cc5affadebda0be10e9e196bd76490b11d07ec6698b783c23664. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INT1O2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7c809d93be552d1d3d7bab74d1a9fdc5e77a4cc4b76f9b0bf49ca0727c3603. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/INT1O2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7523eae3e1ee45ea3fa8135a059731c4458b59ca2371ffe2635855689fe845e4. 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/INT1O2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bd42547a1ba04c7f2fb1db2312841c33aae964b31a9b7d41f05cf2df86a43. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/INT1O2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20993429ed2062118c38636e599684e28bb6e7d0985e74a570a020eb3d57b8ba. 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/INT1O2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0116e56b81a06ff222d8ff2061e35f821be7a53cec65e4bb68ef5f0f658df4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/INT1O2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5086fb3f9498e6d7ae8c9b582c0882ff08e7c0d3c6eeabb8651e8473e811ef18. 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/FRX762234647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f7a6258e2ae8734db0f3dc2926f439d97a12530ffb932a11c67aef24537bb. 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/FRX762234648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cedeff444af58689231a122efb45401a8bb7d1b86d9cf6340eee875540ec4f6. 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/FRX762234649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61784574400e2ccb68c1650c252ddf9baac718c70508dae18cf21b955a67d22. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX762234650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875e1c45ca75c49b49e2b81d0b63f0f7e1a48000d31d053a83908b25c935ef9f. 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/FRX762234651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90803cbbce233aa1402685a53b6fb2ed537a7b5ec0e4a00df7ad61bb162d7d7b. 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/FRX762234652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2930f68b28b2842d927b84342db5a0cfcdf24e50b14b2857cc80e8d02ab755d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX762234653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fab2f864b0f35f69776b4a7521a61728ec089a7120948ab3713c19e70cde50. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FRX762234654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1782e4b07aef876ba11663dff6cadccfad4dbf10223f8acbdfacb883dbca03e. 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/FRX762234655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9090c405aaffcc95924b1bc79630cf2c1d917056ed135f3be2dc5bc07648c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX762234656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974aa48f39302491d4439f1f4190e911c0996b53b3210da8f116b91d2f0d10f6. 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/FRX762234657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef6b700c681232fdadc9ca1c9be4f8623af0105047c823da48c831df812e8e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA092432198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a362577526b711b8a2a5e935776094c7ed5df95169f644b13e318fc596197df. 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/INT1O2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd116f7eb037829c606f3b8b259a2a9856c2cdc07d4a70780ebfc9d7781cef5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRX762274552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0b8668fc2baabd1c423cda4c58c57ba31a7c1e5588bdf8a924a55da9300a9a. 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/FRX872107290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0487d2081fc32f70b0dd39b0889fddfb7da5e8f3fef9f3b06eec256b5b960a38. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762230558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d015073ad63886d7d6b489f20206725bb5302085b8a8614072dab89bfcf9da. 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/DGA052086134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2de7d2522bb25e9b71052c90b0762ac87563c4c36d00ffea60db8508996820. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DGA052086135.